Ad van den Berg
(University of Groningen)
30/07/2015, 09:00
Karl-Heinz Kampert
(Universität Wuppertal)
30/07/2015, 09:10
Prof.
Sibrand Poppema
(University of Groningen)
30/07/2015, 09:25
Stefan Westerhoff
(University of Wisconsin-Madison)
30/07/2015, 11:00
We provide an update on the continued observation of anisotropy in the arrival direction distribution of cosmic rays in the southern hemisphere. The IceCube neutrino observatory recorded more than 250 billion events between May 2009 and May 2014. Subtracting dipole and quadrupole fit maps, we can use these increased statistics to see significant small-scale structure that approaches our median...
Clemens Hoischen
(University of Potsdam)
30/07/2015, 11:00
NGC 253 is one of only two starburst galaxies that is found to emit γ-ray emission from hundreds of MeV to multiple TeV energies. An accurate measurement of the GeV and TeV spectra is crucial to determine the underlying particle accelerators, to probe the dominant emission loss mechanism(s) and to probe the importance of cosmic-ray interaction and transport. The precision of the measurement of...
Yoshitaka Ito
(Nagoya University (JP))
30/07/2015, 11:00
Observations of UHECRs' by extensive air showers rely
on understanding of hadron interactions at very high energies.
Recent LHC experiments have provided useful hadron interaction data
at the collision energy which is almost equivalent to 10**17 eV
in the laboratory frame.
Among them, the LHCf experiment is dedicated measurement of neutral particle productions at very forward region...
Dr
Lingling Ma
(Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences,)
30/07/2015, 11:00
The data recorded by ARGO-YBJ in more than 5 years have been analyzed todetermine the diffuse gamma ray emission from the Galactic plane. The spatial distribution of the diffuse gamma rays and their energy spectra at Galactic longitudes 25^o < l <100^o o and Galactic latitudes |b|<5^o have been studied. The regions with 40^o< l <100^o and 65^o < l <85^o have been focused, where Milagro...
Tycho von Rosenvinge
(NASA/Goddard Space Flight Center)
30/07/2015, 11:00
Using observations from the High Energy Telescopes on STEREO A and B and similar observations from SoHO, near-Earth, we have identified ~250 individual solar energetic particle events that include >14 MeV protons since the beginning of the STEREO mission (Richardson, et al., Solar Physics, 2014). Between the end of December 2009, when the STEREO A and B spacecraft were, respectively, ahead...
Prof.
Leon Kocharov
(University of Oulu, Finland)
30/07/2015, 11:15
We perform a comparative study of the time-profile morphology of solar high-energy particle emissions including relativistic electrons in three energy channels of SOHO/EPHIN, relativistic protons as registered by the worldwide network of neutron monitors, and ~100 MeV/n protons and helium in several energy channels of SOHO/ERNE. Based on numerical modeling of the interplanetary transport, we...
Mr
Gabriele Cologna
(LSW Heidelberg)
30/07/2015, 11:15
The BL$\,$Lac object Mrk$\,$501 was observed at Very High Energies (E$\,$>$\,$100$\,$GeV) with H.E.S.S. (High Energy Stereoscopic System) between 2004 and 2014. The source is detected with high significance above $\sim$2$\,$TeV in $\sim$13.6$\,$h livetime. The observations include periods of low flux and active phases. This led to the detection of strong flaring events, which in 2014 showed a...
Joshua Wood
(University of Maryland, College Park)
30/07/2015, 11:15
Geminga is a radio-quiet pulsar ~250 parsecs from Earth that was first discovered as a GeV gamma-ray source and then identified as a pulsar. Milagro observed an extended TeV source spatially consistent with Geminga. HAWC observes a similarly extended source. Observations of Geminga’s flux and extension will be presented.
Francesco Cafagna
(Universita e INFN, Bari (IT))
30/07/2015, 11:15
The precise knowledge of the proton-proton cross section is extremely
important to model the development, in the atmosphere, of the showers
induced by the interaction of ultra high energy cosmic rays.
The TOTEM (TOTal cross section, Elastic scattering and diffraction
dissociation Measurement at the LHC) experiment at LHC, has been
designed to measure the total proton-proton...
Dr
Masaaki Hayashida
(Institute for Cosmic-Ray Research, University of Tokyo)
30/07/2015, 11:30
RX J1136.5+6737 (z=0.1342) is a hard X-ray bright high-peaked frequency BL Lac object as listed in the MAXI 3-year catalog as well as the Swift-BAT catalog. The source has also been detected by Fermi-LAT with a hard photon index of $1.68\pm0.12$, and belongs to the first Fermi-LAT catalog of $>10$ GeV sources, showing bright (photon flux = $11.7\times10^{-11}$ ph cm$^{-2}$ s$^{-1}$) emission...
Juan Carlos Diaz Velez
(University of Wisconsin-Madison)
30/07/2015, 11:30
During the past two decades, experiments in both the Northern and Southern hemispheres have observed a small but measurable energy-dependent sidereal anisotropy in the arrival direction distribution of galactic cosmic rays. The relative amplitude of the anisotropy is $10^{−4} - 10^{−3}$. However, each of these individual measurements is restricted by limited sky coverage, and so the...
Dr
Alessandro Bruno
(Department of Physics, University of Bari, I-70126 Bari, Italy)
30/07/2015, 11:30
The PAMELA satellite experiment is providing the first direct measurements of Solar Energetic Particles (SEPs) with energies from about 80 MeV to several GeV in near-Earth space, bridging the low energy data from space-based instruments and the Ground Level Enhancement (GLE) data from the worldwide network of neutron monitors. Its unique observational capabilities include the possibility of...
1196.
Study of high muon multiplicity cosmic ray events with ALICE at the CERN Large Hadron Collider
Mario Rodriguez Cahuantzi
(Autonomous University of Puebla (BUAP, México)))
30/07/2015, 11:30
ALICE is one of four large experiments at the CERN Large Hadron Collider. Located 52 meters underground with 28 meters of overburden rock,it has also been used to detect atmospheric muons produced by cosmic ray interactions in the upper atmosphere. We present the multiplicity distribution of these cosmic ray muon events and their comparison with Monte Carlo simulation. This analysis exploits...
Mr
Hao Zhou
(Michigan Technological University)
30/07/2015, 11:30
A number of Galactic sources emit GeV-TeV gamma rays that are produced through leptonic and/or hadronic mechanisms. Spectral analysis in this energy range is crucial in order to understand the emission mechanisms. The HAWC Gamma-Ray Observatory, with a large field of view and location at 19º N latitude, is surveying the Galactic Plane from high Galactic longitudes down to near the Galactic...
Dr
Alexander Edward Herve
(Karlsruhe Institute of Technology)
30/07/2015, 11:45
The interpretation of extensive air shower measurements, produced by ultra-high energy cosmic rays, relies on the correct modelling of the hadron-air interactions that occur during the shower development. The majority of hadronic particles is produced at equivalent beam energies below the TeV range. NA61/SHINE is a fixed target experiment using secondary beams produced at CERN using the SPS....
Valentina Vacca
(Max Planck for Astrophysics)
30/07/2015, 11:45
We analyze the 6.5 year all-sky data from the Fermi Large Area Telescope restricted to gamma-ray photons with energies between 0.6-307.2 GeV. Raw count maps show a superposition of diffuse and point-like emission structures and are subject to shot noise and instrumental artifacts. Using the D3PO inference algorithm, we model the observed photon counts as the sum of a diffuse and a point-like...
Amjad Al-Sawad
(Ministry of Higher Education and Scientific Research/Iraq)
30/07/2015, 12:00
To understand what kind of solar or interplanetary events are capable of producing solar energetic particle (SEP) events with
proton energies > 90 MeV, and where and when acceleration of such protons starts. We have selected 40 energetic proton events with intensities > 10−3cm−2 sr−1 s−1 MeV−1 at 93.8–94 MeV, detected by
the Energetic and Relativistic Nuclei and Electrons (ERNE) instrument...
Andrea Chiavassa
(Universita` di Torino)
30/07/2015, 12:00
In this contribution we present the results of a search for large scale anisotropies performed,
using the East-West method, with the whole data set of the KASCADE-Grande experiment.
The counts distribution in sidereal time intervals of 20 minutes, obtained applying the East-West
analysis technique (correctly removing instrumental and atmospheric effects), is analyzed in
terms of a dipole...
423.
RCW 86 an extended SNR viewed at high energy with the new Fermi-LAT Pass 8 event reconstruction
Benjamin Condon
(CNRS)
30/07/2015, 12:00
Supernovae Remnants (SNRs) are thought to be the primary source of galactic cosmic rays observed on Earth. Detected in radio, infrared, X-rays and at high (GeV) and very high energy (TeV) gamma rays, RCW 86 is a good candidate for efficient particle acceleration and might be the remnant of the historical supernova SN 185. Using more than 6 years of data acquired by the Fermi Large Area...
Dr
Marcos Santander
(Barnard College, Columbia University)
30/07/2015, 12:00
A potential clue to finding the long-sought-after sources of cosmic rays is the recent observation of an astrophysical flux of high-energy neutrinos by the IceCube detector, since these possibly originate in hadronic interactions near cosmic-ray accelerators. While the neutrino sky map shows no indication of point sources so far, it is possible to utilize the sensitivity of TeV Cherenkov...
Dr
Ralf Matthias Ulrich
(KIT - Karlsruhe Institute of Technology (DE))
30/07/2015, 12:00
There are two main points, where the data from a fixed-target experiment with LHC beam will contribute unique information. Firstly, to better understand the inclusive flux of atmospheric neutrinos at very high, PeV, energies. Secondly, to the apparent over-abundance of GeV muons in ultra-high energy extensive air showers. To contribute towards answering these questions, the experimental...
Azadeh Keivani
(Pennsylvania State University)
30/07/2015, 12:15
We present the results of archival coincidence analyses between public neutrino data from the 40-string and 59-string configurations of IceCube (IC40 and IC59) with contemporaneous public gamma-ray data from Fermi LAT and Swift. Our analyses have the potential to discover statistically significant coincidences between high-energy neutrinos and gamma-ray signals, and hence, possible...
Roberto Iuppa
(Universita e INFN Roma Tor Vergata (IT))
30/07/2015, 12:15
Deviations from isotropy in the cosmic ray arrival direction distribution indicate the laboratory reference frame moving with respect to the cosmic radiation. When data are ordered in sidereal time, any effect is of great importance, as it may trace potential sources of cosmic rays and probe their propagation through magnetic fields. For the same reason, to decipher results implies unfolding...
Eric Christian
(NASA/GSFC)
30/07/2015, 12:15
Over the last seventy years, solar energetic particle (SEP) ground level events (GLEs) have been observed by ground-based neutron monitors and muon telescopes at a rate of slightly more than one per year. Ground-based detectors only measure secondary particles, and matching their observations with SEP in-situ measurements at lower energies from spacecraft has been difficult. Now, the Payload...
Mathieu Chrétien
(LPNHE CNRS/IN2P3)
30/07/2015, 14:00
Constraining photon dispersion relation from observations of the Vela pulsar with H.E.S.S
------------------------------------------------------------------------
*M.Chrétien, J. Bolmont, A. Jacholkowska, for the H.E.S.S. collaboration*
Some approaches to Quantum Gravity (QG) predict a modification of the dispersion relations also known as a Lorentz Invariance Violation. The effect is...
Olivier Deligny
(CNRS/IN2P3)
30/07/2015, 14:00
The large-scale distribution of arrival directions of high-energy cosmic rays is a key observable in attempts to understand their origin. The dipole and quadrupole moments are of special interest in revealing potential anisotropies. An unambiguous measurement of these moments as well as of the full set of spherical harmonic coefficients requires full-sky coverage. This can be achieved by...
Anita Reimer
(University of Innsbruck)
30/07/2015, 14:00
Neutrino production in jetted AGN is linked to hadronic processes such as photomeson production. The same interaction predicts also high-energy photons, mostly via neutral pion decay. While neutrinos escape the source unattenuated, the hadronically produced high-energy photons and pairs initiate pair cascades in most cases which re-distribute their energy to lower frequencies where photons can...
Dr
Leonid Ksenofontov
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)
30/07/2015, 14:00
A nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova
remnants (SNRs) is employed to re-examine the nonthermal properties of the
remnant of SN 1987A for an extended evolutionary period of 5-50 yr.
This spherically symmetric model is approximately applied to the different
features of the SNR which consist of a Blue Supergiant (BSG) wind and bubble,
and the swept-up...
Fabio Zandanel
(University of Amsterdam)
30/07/2015, 14:15
Cosmic-ray (CR) protons can accumulate for cosmological times in clusters of galaxies. Their hadronic interactions with protons of the intra-cluster medium (ICM) generate secondary electrons, gamma-rays and neutrinos. In light of the high-energy neutrino events recently discovered by the IceCube observatory, we estimate the contribution from galaxy clusters to the diffuse gamma-ray and...
Ms
Yayoi Tomono
(Tokai University)
30/07/2015, 14:15
Recent X-ray observations of active galactic nuclei (AGNs) have revealed the widespread existence of ultra fast outflows (UFOs), i.e. powerful outflows of baryonic material with velocities $>$10,000 km s$^{-1}$($\sim$0.03 c), seen as variable, blueshifted absorption lines of ionized heavy elements. They have been interpreted as winds driven by the accretion disk, and may be responsible for...
Kai Martens
(The University of Tokyo)
30/07/2015, 14:15
XMASS is an experimental program at the Kamioka Observatory in Japan designed for low energy, low background dark matter searches and neutrino physics. The core technology is a self shielding single-phase liquid xenon detector optimized for maximum scintillation light collection. In this talk we describe its current implementation and discuss its general performance after its 2013 refurbishment.
650.
Arrival directions of the highest-energy cosmic rays detected with the Pierre Auger Observatory
Julien Aublin
(urn:Google)
30/07/2015, 14:30
We present the results of a search for small scale anisotropies in the distribution of arrival directions of ultra-high energy cosmic rays recorded at the Pierre Auger Observatory. The data set, gathered in ten years of operation, includes arrival directions with zenith angles up to $80^\circ$, and is about three times larger than that used in earlier studies. We update the test based on...
Josefa Becerra Gonzalez
(NASA GSFC)
30/07/2015, 14:30
The detection of Flat Spectrum Radio Quasars (FSRQs) in the Very High Energy (VHE, E>100 GeV) range is challenging, mainly because of their steep soft spectra in this energy band. Up to now only four FSRQs have been detected in VHE, three of them discovered by MAGIC. The gamma-ray observations observations at such high energies are crucial to understand their emission, especially to constrain...
Atsushi Takeda
(University of Tokyo)
30/07/2015, 14:30
XMASS-I, the first phase of the XMASS project, is a direct detection dark matter experiment using 832 kg of liquid xenon.
The key idea to reduce the background at low energies in XMASS is to use liquid xenon itself as a shield.
In this analysis the clean core of the 832 kg liquid xenon volume is used as sensitive fiducial volume by eliminating the volume near the wall which suffers from beta...
Dr
Takashi SAKO
(Institute for Cosmic Ray Research, University of Tokyo)
30/07/2015, 14:30
The Crab Nebula is the standard calibration candle for TeV cosmic
gamma-ray experiments.
None of those experiments has detected gamma rays above 100 TeV from the Crab Nebula,
and the best upper limits have been given by the CASA-MIA experiment.
In the circumstances, it is a common understanding that the energy spectrum of
the Crab Nebula can be reproduced well by a mechanism based on the...
Francisco Salesa Greus
(The Pennsylvania State University)
30/07/2015, 14:45
The High Altitude Water Cherenkov (HAWC) Observatory is a TeV gamma-ray detector which has been completed in early 2015. HAWC started science operations in August 2013 with a fraction of the detector taking data. Several known gamma-ray sources have been already detected with the first HAWC data. Among these sources, the Crab Nebula, the brightest steady gamma-ray source at very high energies...
Dr
Maria Petropoulou
(Purdue University)
30/07/2015, 14:45
The recent IceCube discovery of 0.1-1 PeV neutrinos
of astrophysical origin opens up a new era for high-energy astrophysics. There are various astrophysical candidate sources, including active galactic nuclei (AGN) and starburst galaxies. Yet, a firm association of the detected neutrinos with one (or more) of them is still lacking. This talk will focus on the possible association of
IceCube...
Hiroyuki Sagawa
(RIKEN),
Igor Tkachev
(Russian Academy of Sciences (RU)),
Peter Tinyakov
(Universite Libre de Bruxelles (ULB))
30/07/2015, 14:45
The Telescope Array has collected 7 years of data and accumulated the largest UHECR data set in the Northern hemisphere. We make use of these data to search for large- and small-scale anisotropy of UHECR. At small angular scales we examine the data for clustering of events and correlations with various classes of putative sources. At large angular scales we will present a blind search for...
Joao de Mello Neto
(Federal University of Rio de Janeiro)
30/07/2015, 14:45
The DAMIC (Dark Matter in CCDs) experiment uses high resistivity scientific grade CCDs to search for dark matter. The CCD's low electronic noise allows an unprecedently low energy threshold of few tens of eV that makes it possible to detect silicon recoils resulting from interactions of low mass WIMPs. In addition the CCD's high spatial resolution and the excellent energy response ...
Dr
Lili Yang
(University of Nova Gorica)
30/07/2015, 15:00
Accelerated ultrahigh-energy cosmic rays (UHECRs) in long-lived gamma-ray burst (GRB) blast waves are expected to interact with X-ray to optical-infrared photons of GRB afterglow to produce PeV-EeV neutrinos. These long-lived neutrino fluxes can last for a time scale of days to years, in contrast to the prompt neutrino fluxes under the internal shocks model with a time scale of seconds to...
Prof.
Justin Vandenbroucke
(University of Wisconsin - Madison)
30/07/2015, 15:00
The excess of positrons in cosmic rays above ∼10 GeV has been a puzzle since it
was discovered. Possible interpretations of the excess include acceleration of positron
secondaries in local supernova remnants or pulsars, or the annihilation or decay of dark
matter particles. To distinguish between these interpretations, the measurement of the
positron fraction must be extended to higher...
320.
Search for Dark Matter annihilations in the Sun using the completed IceCube neutrino telescope.
Mohamed Rameez
(Universite de Geneve (CH))
30/07/2015, 15:00
If Dark Matter consists of Weakly Interacting Massive Particles (WIMPs), these might be gravitationally captured in the Sun where they could self-annihilate into standard model particles. Terrestrial neutrino detectors such as IceCube can observe this as an enhanced neutrino flux in the direction of the Sun. Sensitivity has improved with respect to previous searches due to better analysis...
Dr
Kevin Meagher
(Université libre de Bruxelles)
30/07/2015, 15:00
The Crab Nebula is the brightest source in the very-high-energy (VHE) gamma-ray sky and one of the best studied non-thermal objects. The dominant VHE emission mechanism is believed to be inverse Compton scattering of low energy photons on relativistic electrons. While it is unclear how the electrons are accelerated to energies of 1016 eV, it is general consensus that the ultimate...
Kazumasa Kawata
(ICRR, University of Tokyo)
30/07/2015, 15:00
The Telescope Array Experiment has observed a cluster of ultrahigh energy cosmic rays, $E>57$ EeV, called the Hotspot. This was reported in (Abbasi et al., ApJ, 790, L21 (2014)), and was centered in Ursa Major. Using the first five years of data collected by the TA surface detector, the chance probability of this hotspot in an isotropic cosmic-ray sky was calculated to be 3.4$\sigma$. In this...
Dr
Antonio Marinelli
(Physics Institute, Pisa University)
30/07/2015, 15:15
During the last decade the innermost part of our galaxy has been observed as a gamma-ray emitting region described by a ridge-like surface. In particular, in 2005 the H.E.S.S. collaboration reported the measurement of a power-law spectrum with index close to -2.3, between 0.1 and 10 TeV, strongly correlated with dense molecular clouds in that region. Last year the VERITAS collaboration...
Christoph Tönnis
(Universitat de Valencia)
30/07/2015, 15:15
The indirect search for dark matter is a topic of utmost interest in neutrino telescopes. The ANTARES detector is located on the bottom of the Mediterranean Sea 40 km off the southern french coast. ANTARES has been taking data since 2007 when the first half of the detector was installed. In this talk the results of the different analyses for dark matter signals from different potential...
Roberta Zanin
(Universitat de Barcelona)
30/07/2015, 15:15
The Crab pulsar wind nebula (PWN) is one of the best studied astrophysical objects. Due to its brightness at all wavelengths, precise measurements are provided by different kind of instruments, allowing for many discoveries, later seen in other non-thermal sources, and a detailed examination of its physics. Most of the theoretical models for PWN emission are, in fact, based on Crab nebula...
Silvia Dalla
(University of Central Lancashire)
30/07/2015, 15:30
In recent years, a wealth of spacecraft measurements of heavy ion solar energetic particles have become available, thanks to data from the ACE and STEREO spacecraft. Interesting features in heavy ion time intensity profiles, such as the decay of the Fe/O ratio over time in some events, have been observed. Heliospheric propagation effects have been invoked in the literature as a possible cause...
Vladimir Novotny
(Charles University in Prague)
30/07/2015, 15:30
We introduce a simple branching model for the development of hadronic showers in the Earth's atmosphere.
Based on this model, we show how the size of the pionic component followed by muons can be estimated.
Several aspects of the subsequent muonic component are also discussed.
We focus on the energy evolution of the muon production depth.
We also estimate the impact of the primary...
Prof.
Kenji Yoshida
(Shibaura Institute of Technology)
30/07/2015, 15:30
The Fermi-LAT 3rd source catalog (3FGL) provides spatial, spectral, and temporal properties for 3033 gamma-ray sources. While 2041 sources in the 3FGL are associated with AGNs (58% of the total), pulsars (5%) and the other classes (4%), 992 sources (33%) remain as unassociated sources. In recognizing source classes for unassociated gamma-ray sources of the Fermi-LAT source catalogs, various...
Mathieu Boudaud
(LAPTh Annecy France)
30/07/2015, 15:30
Antiprotons are regarded as a powerful probe for Dark Matter (DM) indirect detection and indeed current data from PAMELA have been shown to lead to stringent constraints. However, in order to exploit their constraining/discovery power properly and especially in anticipation of the exquisite accuracy of upcoming data from AMS, great attention must be put into effects (linked to their...
Dr
Renat Sibatov
(Ulyanovsk State University, Ulyanovsk, Russia)
30/07/2015, 15:30
Cosmic Ray anisotropy is a key element in the quest to find the origin of the enigmatic particles. A well known problem is that although most of the likely sources are in the Inner Galaxy, the direction from which the lowest energy particles (less than about 1 PeV) come is largely from the Outer Galaxy. We show that this can be understood taking into account a possible reflection of charged...
Stefan Klepser
(DESY)
30/07/2015, 15:30
Brian Wundheiler
(Instituto de Tecnologias en Deteccion y Astroparticulas)
30/07/2015, 15:30
Although the nature of ultra high energy cosmic rays is still largely unknown, significant progress has been achieved in last decades with the construction of the large arrays that are currently taking data. One of the most important pieces of information comes from the chemical composition of primary particles. It is well known that the muon content of air showers generated by the interaction...
Mr
Ori Weiner
(Columbia University)
30/07/2015, 15:30
In imaging atmospheric Cherenkov telescope arrays (IACTs), the standard method of statistically inferring the existence of a source is based on the maximum likelihood method of Li&Ma (1983). We will present a new statistical approach, also based on maximum likelihood theory, which takes into account a priori knowledge of the source light curve. This approach is especially useful for...
Ralph Richard Engel
(KIT - Karlsruhe Institute of Technology (DE))
30/07/2015, 15:30
The event generator Sibyll can be used for the simulation of hadronic
multiparticle production up to the highest cosmic ray energies. It is
optimized for providing an economic description of those aspects of
the expected hadronic final states that are needed for the calculation
of air showers and atmospheric lepton fluxes. New measurements from
fixed target and collider experiments, in...
Mr
Thomas Pöschl
(Technische Universität München)
30/07/2015, 15:30
Measuring cosmic antimatter fluxes probes many astrophysical processes. The abundancies and energy spectra of antiparticles support the understanding of the creation and propagation mechanisms of cosmic rays in the Universe. Deviations from theoretical predictions may hint to exotic sources of antimatter or inaccuracies in our understanding of the involved processes. Specifically,...
Xi Luo
(SIGMA Weather Group, State Key Laboratory of Space Weather, Center for Space Science and Applied Research, CAS, Beijing, China)
30/07/2015, 15:30
Based on a hybrid galactic cosmic ray transport model, which incorporated MagnetoHydroDynamics (MHD) global heliospheric data into Parker's cosmic ray transport equation, we studied the behaviour of the transport of galactic cosmic rays near the heliopause (HP). We found that: (1) By increasing the ratio of the parallel diffusion coefficient to the perpendicular diffusion coefficient in the...
Kai Krings
(Technische Universität München, Physik-Department)
30/07/2015, 15:30
A next generation of IceCube is under design targeting the Precision IceCube Next Generation Upgrade (PINGU) for the neutrino mass ordering and an extended array for astrophysical neutrino sources. A new level of precision is needed in order guarantee improved performances respect IceCube. A better calibration system will enable a better understanding of the ice and will therefore...
Dr
Sergio Dasso
(Instituto de Astronomía y Física del Espacio (UBA-CONICET), Buenos Aires, Argentina. Departamento de Ciencias de la Atmósfera y los Océanos and Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina)
30/07/2015, 15:30
The Latin American Giant Observatory (LAGO) consist in a network of water-Cherenkov detectors (WCD) located in nine countries of Latin America, to study with extreme detail the flux of cosmic rays (CRs) from ground level. The main scientific aims are oriented to address several problems of astrophysics, space physics and atmospheric physics. In particular, LAGO has started to develop an...
Felix Spanier
(North-West University)
30/07/2015, 15:30
Active Galactic Nuclei have been in the focus of gamma-ray telescopes for the past years. With the ever growing sample of AGN the need for physically motivated, self-consistent modeling is also growing.
The major questions to be answered by models are: What are the main constituents of AGN jets? What are the acceleration mechanisms? Are AGN possible accelerators for UHECR and possible...
Dr
Hans Peter Dembinski
(Bartol Institute, Dept of Physics and Astronomy, University of Delaware)
30/07/2015, 15:30
The IceCube MasterClass is an outreach project of the IceCube experiment at South Pole for 9th to 12th grade school students. The MasterClass is designed to provide an authentic astrophysics research experience by demonstrating typical elements of IceCube research. It is a full-day experience of engaging activites, eductional talks, and scripted analyses, where students can reproduce the main...
Mr
Firas Al-Hamadani
(University of Turku and University of Basrah)
30/07/2015, 15:30
On March 17-18, 2003 the Energetic and Relativistic Nuclei and Electrons (ERNE) instrument on board the Solar and Heliospheric Observatory (SOHO) spacecraft observed three solar energetic particle (SEP) events in rapid succession (within 26 hours) from the same active region of the Sun. The first event was weak and proton intensity enhancement was observed only below 25 MeV. No coincident...
Marcos López Moya
(University Complutense of Madrid)
30/07/2015, 15:30
The MAGIC telescopes were built with the aim of achieving the lowest possible energy threshold among the current generation of Cherenkov telescopes. This was mandatory to detect sources with emission mainly below 100 GeV, as distant AGNs and pulsars. In 2009, the second MAGIC telescope started operation, and in the last years, a major upgrade of the system took place. One of the main...
Dr
Toshiyuki Nonaka
(Institute for Cosmic Ray Research, University of Tokyo)
30/07/2015, 15:30
The Telescope Array (TA) experiment is located in the western desert of Utah, USA and observes ultra high energy cosmic rays in the northern hemisphere. In the highest part of the energy region, the cosmic ray energy spectrum shape carries information of the source density distribution. We search for directional differences in the energy spectrum shape. In this study, observed cosmic ray...
Michael Alania
(Siedlce University), Dr
Renata Modzelewska
(Siedlce University)
30/07/2015, 15:30
We study seasonal distributions of the visually observed cloudless days (CD) and cloudless nights (CN) at Abastumani Astrophysical Observatory (41.75N, 42.82E; Georgia) and the galactic cosmic ray (GCR) intensity in 1957-1993. The annual variations of monthly numbers of CD and CN have been observed, with maximum in August for CD and in September for CN. During geomagnetic disturbances it is...
Simon Bacholle
(APC- Paris Diderot university)
30/07/2015, 15:30
Using an integrated propagation code that takes into account particle energy losses, nuclear photo-dissociation and deflections by Galactic and extragalactic magnetic fields, we simulate representative sky maps of ultra-high-energy cosmic rays over the entire sky, for a wide range of astrophysical scenarios, with different source density, spectrum and composition. We analyze these sky maps...
carlos medina-hernandez
(colorado school of mines)
30/07/2015, 15:30
The Fluorescence Detector (FD) at the Pierre Auger Observatory measures the intensity of the scattered light from laser tracks generated by the Central Laser Facility (CLF) and the eXtreme Laser Facility (XLF) to monitor and estimate the aerosol optical depth (tau(z,t)). These measurements are important to have unbiased and reliable FD reconstruction of the energy of the primary cosmic ray,...
Abdullrahman Maghrabi
(King Abdulaziz City For Science and Technology)
30/07/2015, 15:30
To study the dependence of the muon rate flux on temperature we need to have some measure of atmospheric temperature above the detection site. Atmospheric weighted temperature, known also as the effective temperature, is defined as the temperature of an isothermic atmosphere that reflects the temperature of the real atmosphere with its varying conditions. In this paper, the influence of the...
Andreas Haungs
(Karlsruhe Institute of Technology)
30/07/2015, 15:30
The findings so far of the Pierre Auger Observatory and those of the Telescope Array define some requirements for a possible next generation global cosmic ray observatory: it needs to be considerably increased in size, it needs good sensitivity to composition, and it has to cover the full sky. At the Pierre Auger Observatory, AugerNext aims to conduct some innovative initial research studies...
Gaetano Salina
(Istituto Nazionale di Fisica Nucleare)
30/07/2015, 15:30
The quality of the physics results, derived from the analysis of the data collected at the Pierre Auger Observatory depends heavily on the calibration and monitoring of the components of the detectors. It is crucial to maintain a database containing complete information on the absolute calibration of all photomultipliers and their time evolution. The low rate of the physics events implies that...
Mr
Jorge Cotzomi
(FCFM BUAP)
30/07/2015, 15:30
For the study of Extensive Atmospheric Showers (EAS) is essential the reconstruction method of Cherenkov radiation produced by charged secondary particles. In the recent studies it was shown that to greater accuracy of the reconstruction parameters of the EAS appears as a dependence of the spatial distribution of Cherenkov radiation as function of the azimuth angle, this due to the influence...
Dr
Thomas Weisgarber
(for the HAWC Collaboration)
30/07/2015, 15:30
The High Altitude Water Cherenkov (HAWC) Gamma Ray Observatory monitors the gamma-ray sky in the 100 GeV to 100 TeV energy range with >95% uptime and unprecedented sensitivity for a survey instrument. The HAWC Collaboration has implemented an online flare monitor that detects episodes of rapid flaring activity from extragalactic TeV sources in the declination band from -26 to 64 degrees. This...
Richard Bartels
(University of Amsterdam)
30/07/2015, 15:30
In the paradigm of ΛCDM, structures form hierarchically, implying that large structures contain smaller substructures. These so-called subhalos can enhance the dark matter annihilation signal that one expects to see from a given host halo, the effect of which is called the boost factor. In the literature this boost factor is typically calculated assuming a density profile for the substructure,...
Anastasia Petukhova
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy)
30/07/2015, 15:30
Acceleration of solar energetic particles by the shock generated by the coronal mass ejection is calculated. The external boundary of coronal mass ejection and the shock front are specified as the segments of spherical surfaces with the different radii moving in coordination. Nonstationarity of process, spherical symmetry and adiabatic losses of particle energy in the extending environment are...
Paolo Brogi
(Universita degli studi di Siena (IT))
30/07/2015, 15:30
CALET is a space mission currently in the final phase of preparation for a launch to the International Space Station (ISS), where it will be installed on the Exposed Facility of the Japanese Experiment Module (JEM-EF). In addition to high precision measurements of the electron spectrum, CALET will also perform long exposure observations of cosmic nuclei from proton to iron and will detect...
Gabriele Bigongiari
(Universita degli studi di Siena (IT))
30/07/2015, 15:30
CALET is a space mission currently in the final phase of preparation for a launch to the International Space Station (ISS), where it will be installed on the Exposure Facility of the Japanese Experiment Module (JEM-EF). One of the main science goals of the experiment is the measurement of the inclusive electron (+positron) spectrum.
By integrating a sufficient exposure on the ISS, CALET will...
Dr
Alberto Carramiñana Alonso
(INAOE)
30/07/2015, 15:30
The Latin American Giant Observatory (LAGO) is an international network of water-Cherenkov detectors (WCD) set in different sites across Latin America. In México, on the top of the Sierra Negra volcano at 4530 m a.s.l., LAGO has completed its first instrumented detector of an array, consisting of a cylindrical WCD with 7.3 m in diameter and 1 m of height, with a total detection area of $40$...
Mr
Motoki Hayashi
(Shinshu University)
30/07/2015, 15:30
The main calibration items of Fluorescence Detector (FD) observation are the fluorescence yield, the atmospheric attenuation and the detector sensitivity.
In 2012-2013, we conducted a joint TA-Auger calibration campaign by a flying device mounted with an ultraviolet LED as a standard light source. This device is called an octocopter, and was built by KIT. An octocopter has excellent...
Jörg Hörandel
(Ru Nijmegen/Nikhef)
30/07/2015, 15:30
Extensive air showers create short nanosecond-scale pulses in the radio frequencies. These pulses have been measured successfully in the past years at the Low-Frequency Array (LOFAR).
Due to the short duration and emission of the signal in the atmosphere, methods based on flux calibration of known sources as used in radio astronomical observations cannot be applied to establish an absolute...
Bokkyun Shin
(Hanyang University)
30/07/2015, 15:30
The Electron Light Source (ELS) is a linear accelerator used to perform energy calibration of the fluorescence detectors (FD) in the Telescope Array experiment. The ELS shoots a beam of 40 MeV electrons into the atmosphere 100 m in front of the Black Rock Mesa FD. Air fluorescence light is detected from nitrogen molecule excitation by the ELS electron beam. An end-to-end calibration from...
Alexandre Creusot
(Universite de Paris VII (FR))
30/07/2015, 15:30
KM3NeT is the next generation neutrino telescope being installed in the Mediterranean Sea. The first detection unit of the telescope is ready for installation in the deep Mediterranean Sea in the summer of 2015. Eighteen digital optical modules have been mounted on a vertical string for the detection of the Cherenkov light emitted by muons induced by up-going neutrinos. This paper reports on...
Prof.
Rostislav Kokoulin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
30/07/2015, 15:30
Measurements of the energy spectra of cascade showers generated due to interactions of penetrating cosmic ray particles in massive water/ice detectors is one of the main methods of the study of the energy characteristics of the fluxes of muons and neutrinos. In the present paper, results of investigations of cascades initiated by inclined muons in the Cherenkov water detector NEVOD with a...
German Gomez-Vargas
(Pontifical Catholic University of Chile)
30/07/2015, 15:30
The positron fraction measured by the space-based detectors PAMELA, {\it Fermi}-LAT and AMS-02 presents anomalous behaviour as energy increase. In particular AMS-02 observations provide compelling evidence for a new source of positrons and electrons. Its origin is unknown, it can be non-exotic (e.g. pulsars), be dark matter (DM) or maybe a mixture. We test the gravitino of bilinear R-parity...
Prof.
Vladimir Vassiliev
(University of California Los Angeles)
30/07/2015, 15:30
The design of a 9.5-m prototype Schwarzschild-Couder telescope (pSCT) with an aplanatic two-mirror optical system has been developed to evaluate its capabilities for the future Cherenkov Telescope Array Observatory (CTAO). The construction of this novel imaging atmospheric Cherenkov telescope (IACT) is scheduled for early autumn of 2015 at the Fred Lawrence Whipple Observatory in Southern...
Stephen Kahler
(Air Force Research Laboratory)
30/07/2015, 15:30
We review recent work on 111 Fe-rich impulsive solar energetic (~3 MeV/nuc) particle (SEP) events observed from 1994 to 2013. Strong elemental abundance enhancements scale with A/Q, the ion mass-to-charge ratio, as (A/Q)^(a), where 2 < a < 8 for different events. Most Fe-rich events are associated with both flares and coronal mass ejections (CMEs), and those with larger a are associated with...
Mr
Hari Haran Balakrishnan
(HECR Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India and GRAPES-3 Experiment, Cosmic Ray Laboratory, Ooty 643 001, India)
30/07/2015, 15:30
For the analysis of the GRAPES-3 Muon data, large scale Monte Carlo simulations are required. These simulations are performed using the CORSIKA simulation package developed by the KIT group. However, the geomagnetic cutoff rigidity varies with direction, therefore, a constant threshold for selection of primary energy results in generation of a large number of events that are subsequently...
Prof.
Kumar Rajiv
(Government Pench Valley post Graduate College Parasia)
30/07/2015, 15:30
ABSTRACT: In this paper,we have provided an overview of effects of cosmic radiation on terrestrial processes such as cloud formation,cloud coverage, lightning,global electrical circuit ,etc.It is evolved empirically that cosmic rays control short-term and long-term variations in climate.we also explained that how additional ionization produced by cosmic rays could enhance charging rate and...
Susumu Inoue
(Institute for Cosmic Ray Research, University of Tokyo)
30/07/2015, 15:30
There is mounting evidence for the widespread existence of ultra-fast outflows in active galactic nuclei, which are powerful outflows of baryonic material approaching mildly relativistic velocities, observed as variable, blue-shifted X-ray absorption lines of ionized heavy elements. Occurring in both radio-loud and radio-quiet objects, they are plausibly interpreted as winds driven by the...
Mr
Jon Paul Lundquist
(Telescope Array Project)
30/07/2015, 15:30
A simple cosmic ray track finding pattern recognition analysis (PRA) method for fluorescence detectors (FD) has been developed which significantly improves Xmax resolution and its dependence on energy. Events which have a clear rise and fall in the FD view contain information on Xmax that can be reliably reconstructed. Shower maximum must be extrapolated for events with Xmax outside the field...
Ms
Xilu Wang
(University of Illinois at Urbana and Champaign)
30/07/2015, 15:30
In star-forming galaxies, gamma rays are mainly produced through the collision of high-energy protons in cosmic rays and protons in the interstellar medium (ISM) (i.e. cosmic ray-induced π0 γ-radiation). For a “normal” star-forming galaxy like the Milky Way, most cosmic rays escape the Galaxy before such collisions, but in starburst galaxies with dense gas and huge star formation rate, most...
Catia Grimani
(University of Urbino "Carlo Bo")
30/07/2015, 15:30
Positrons were discovered in cosmic rays 50 years ago.
During the last 25 years, reliable magnetic
spectrometer observations consistently revealed an excess of these particles above a few GeV with respect to the expected secondary component. The most recent measurements of the positron flux and the e+/(e++e-) ratio carried out by the Pamela and AMS experiments confirm the average trend of...
Amanda Weinstein
(Iowa State University)
30/07/2015, 15:30
The Cygnus region hosts one of the most remarkable star-forming regions in the Milky Way. Indeed, the total mass in molecular gas of the Cygnus X complex exceeds 10 times the total mass of all other nearby star-forming regions. Surveys at all wavelengths, from radio to gamma-rays, reveal that Cygnus contains such a wealth and variety of sources---supernova remnants (SNRs), pulsars, pulsar...
Dennis Cazar Ramírez
(Universidad San Francisco de Quito)
30/07/2015, 15:30
Nowadays, one of the most challenging scenarios scientists and scientific communities are facing is the huge amount of data emerging from vast networks of sensors and from computational simulations performed in a diversity of computing architectures and e-infrastructures. In this work we present the strategy of the Latin American Giant Observatory (LAGO) to catalog and preserve a vast amount...
Prof.
Guiming Le
(National Satellite Meteorological Administration, CMA, China)
30/07/2015, 15:30
To investigate the possible acceleration mechanism for high energy (E>100 MeV) protons, the correlation coefficients (CCs) are calculated between the prompt component intensity (PCI) of E>100 MeV solar proton events (SPEs) and the speed of coronal mass ejections (CMEs), and the soft X-ray (SXR) emission of solar flares. Data analysis shows that the CCs between the PCI of E>100 MeV SPEs and the...
Stephany Vargas
(Escuela Politécnica Nacional)
30/07/2015, 15:30
The Latin American Giant Observatory (LAGO) Project is an extended Cosmic Ray Observatory mainly oriented to perform basic research in three branches: high energy phenomena, space weather and atmospheric radiation at ground level. To observe the high energy component (over 10 GeV) of Gamma Ray Bursts (GRBs), the LAGO Collaboration is installing Water Cherenkov Detectors (WCDs) in high altitude...
Karl-Heinz Kampert
(Universität Wuppertal)
30/07/2015, 15:30
Fluorescence telescopes are an important technique to measure extensive air showers initiated by ultra-high energetic cosmic rays. They detect the longitudinal profile of the energy deposited in the atmosphere by
the de-excitation of nitrogen molecules in the UV-range. In the past years the development of photomultiplier tubes (PMT) has led to an increase of more than $30\%$ in photon...
Nepomuk Otte
(Georgia Institute of Technology)
30/07/2015, 15:30
We present a development of a novel 11328 pixel silicon photomultiplier (SiPM) camera for use with a ground-based Cherenkov telescope with Schwarzschild-Couder optics as a possible mid-size telescope for the Cherenkov Telescope Array (CTA), which is the next generation very-high-energy gamma-ray observatory. . The finely pixelated camera samples air-shower images with more than twice the ...
Asato Orii
(University of Tokyo)
30/07/2015, 15:30
Super-Kamiokande (SK) is a 50-kiloton water Cherenkov detector. It is one of the most sensitive neutrino detectors and can be used for supernova observations by detecting supernova burst neutrinos.
Recently, it is reported that Betelgeuse (640ly) is shrinking 15% in 15 years (C. H. Townes et al., 2009). Although this report does not immediately imply the supernova explosion of Beteleuse, it...
Shoichi Ogio
(Osaka City University)
30/07/2015, 15:30
TALE, the Telescope Array Low Energy extension is designed to lower the energy threshold to about $10^{16.5}$ eV. The TALE surface detector will include an infill array of 76 scintillation counters (40 with 400 m spacing and 36 with 600 m spacing) and an addition to the TA SD of 27 counters. We have already deployed 35 counters with 400 m spacing in April 2013. For the additional 68 counters,...
Keiichi Mase
(Chiba University)
30/07/2015, 15:30
The Askaryan effect is the coherent radio emission of an electron excess in a particle cascade.
ARA (Askaryan Radio Array) is being built to observe the Askaryan radiation
from ultra high energy neutrino (E > 10PeV) induced showers in ice around the South Pole.
In order to study further the characteristics of the coherent emission,
and also validate ARA detection system response, we set up...
Yoichi Asaoka
(Waseda University (JP))
30/07/2015, 15:30
The CALET project aims at a long duration observation of high energy cosmic rays onboard the International Space Station (ISS). The CALET detector features a very thick calorimeter of 30 radiation-lengths which consists of imaging and total absorption calorimeters. It will directly measure the cosmic-ray electron spectrum in the energy range of 1GeV--20TeV with 2-% energy resolution.
...
Olivier Deligny
(CNRS/IN2P3)
30/07/2015, 15:30
The transport of Galactic cosmic rays in both turbulent and regular magnetic fields can be described in terms of diffusion and drift motions. These produce gradients of cosmic-ray densities. The anisotropy resulting from these gradients for an observer located anywhere in the Galaxy is commonly described in terms of a pure dipole moment, the amplitude of which is proportional to the gradient...
Dr
Sergey Aleksandrin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe shosse, 115409 Moscow, Russia)
30/07/2015, 15:30
The results of the observation of short-term and long-term variations of relativistic electron flux in the region of outer radiation belt in satellite experiments ARINA and VSPLESK are presented. Scintillation spectrometers ARINA (on board the Resurs-DK1 Russian satellite, since 2006) and VSPLESK (on board the International Space Station, since 2008), developed by MEPhI, provide continuous...
Dr
Charles Timmermans
(Nikhef/Radboud University)
30/07/2015, 15:30
The scale and scope of the physics studied at the Pierre Auger Observatory continue to offer significant opportunities for original outreach work. Education, outreach and public relations of the Auger Collaboration are coordinated in a dedicated task whose goals are to encourage and support a wide range of efforts that link schools and the public with the Auger scientists and the science of...
Alexander Mishev
(INRNE-BAS)
30/07/2015, 15:30
An important topic in the field of space weather research is estimation of the expected effective dose of aircrew at flight altitudes due to cosmic rays of solar and galactic origin. The primary cosmic ray particles induce a complicated nuclear-electromagnetic-muon cascade in the Earth atmosphere. The secondary particles form the main source of increased exposure at flight latitudes compared...
Paolo Desiati
(University of Wisconsin - Madison)
30/07/2015, 15:30
Cosmic ray anisotropy has been observed to be present in a wide energy range by a variety of experiments such as Milagro and the IceCube Observatory. However, a satisfactory explanation has been elusive for more than fifteen years now. A possible solution for the TeV-PeV cosmic ray anisotropy is the introduction of turbulent magnetic interactions on the arrival direction. We perform test...
OLEG DALKAROV
(P.N.Lebedev Physical Institute)
30/07/2015, 15:30
107 cascades, created by secondary particles of astroparticle interaction at $10^{16}$ eV, were detected in the stratospheric emulsion chamber. Their azimuth
distribution reveals a distinct anisotropy. Estimation of
the elliptic flow coefficient v2 gives a value 0.35 $\pm$ 0.02.
The distribution of cascade p(t) is also azimuth anisotropic and its maximal value coincides with...
Daisuke Ikeda
(Institute for Cosmic Ray Research, University of Tokyo), Dr
William Hanlon
(University of Utah)
30/07/2015, 15:30
The energy spectrum and mass composition of Ultra-High Energy Cosmic Rays (UHECRs) measured using a hybrid analysis will be presented. TA consists of three FD stations and 507 SDs. A hybrid analysis reconstructs the position and direction of the air shower more accurately than the monocular FD analysis and measures the longitudinal development and calorimetric energy of the shower precisely....
Toshihiro FUJII
(University of Chicago, University of Tokyo)
30/07/2015, 15:30
The Telescope Array (TA) experiment is the largest hybrid detector to observe ultra-high energy cosmic rays (UHECRs) in the northern hemisphere. We report on results of the energy spectrum of UHECRs covering a wide energy range, and the mass composition using the maximum shower depth, from analyzing data collected in monocular mode by the fluorescence detectors of TA during the first seven years.
Mr
Luiz Augusto Stuani Pereira
(Unicamp)
30/07/2015, 15:30
One of the first improvements of the Pierre Auger Observatory is the Auger Muons and Infill for the Ground Array (AMIGA) detector, in order to measure the cosmic ray spectrum and the chemical composition in the energy range from $10^{17}$eV. The muon detectors of the AMIGA *infill* count muons from extensive air showers observed by Auger Observatory, which are then reconstructed by the surface...
Sami Caroff
(Centre National de la Recherche Scientifique (FR))
30/07/2015, 15:30
The Alpha Magnetic Spectrometer AMS-02 is a high energy particle physics detector, operational on the International Space Station since May 2011. The AMS-02 goal is the fundamental physics research in space with high energy cosmic rays, during its 20 year duration mission.
The latest published results, with 30 months of data, show an excess of high energy positrons whose origin is still...
Raphaël Chalmé-Calvet
(LPNHE)
30/07/2015, 15:30
In 2012, the High Energy Stereoscopic System (H.E.S.S.) was expanded by a fifth telescope (CT5). With an enormous effective mirror diameter of 28 m, CT5 is able to detect the Cherenkov light of very faint gamma-ray air showers, thereby significantly lowering the energy threshold of this telescope compared to the other four telescopes. Extracting as much information as possible from the...
Silvia Vernetto
(Istituto Nazionale di Astrofisica)
30/07/2015, 15:30
The gamma ray sky at energies above a few tens of TeV is almost completely unexplored. Sources of photons above ~30 TeV must however exist because cosmic rays are accelerated in the Milky Way at least up to the knee energy. Photon emission in this energy range, with a high degree of confidence, has an hadronic origin and traces the proton and nuclei acceleration sites. Gamma ray astronomy...
Dr
Dorothee Hildebrand
(ETH Zurich)
30/07/2015, 15:30
FACT is the first Imaging Air Cherenkov Telescope to use solid-state photosensors
(G-APD/SiPM) in order to measure the light flashes induced by air-showers.
A vital part of the telescope system is the atmosphere.
Typically, external devices such as LIDARs are used to quantify the quality of the atmospheric condition.
Due to the exceptional stability of G-APD sensors, a different...
Dominik Neise
(ETH Zurich)
30/07/2015, 15:30
The First G-APD Cherenkov Telescope (FACT) is the first operational test of the performance of silicon photomultipliers (SiPM) in Cherenkov Astronomy. These novel photon detectors promised to be an inexpensive and robust alternative for vacuum photomultiplier tubes, but had never been applied in an imaging airshower cherenkov telescope (IACT) up to now. For more than three years FACT has...
Mr
Jens Buß
(TU Dortmund)
30/07/2015, 15:30
The First G-APD Cherenkov telescope (FACT) is the first operational telescope of its kind with a camera equipped with silicon photon detectors (G-APD aka. SiPM). SiPMs have a high photon detection efficiency (PDE), while being more robust to bright light conditions than the commonly used photo-multiplier tubes. This technology has allowed us to increase the duty cycle beyond that of the...
523.
FACT – Novel mirror alignment using Bokeh and enhancement of the VERITAS SCCAN alignment method
Sebastian Mueller
(ETH Zuerich)
30/07/2015, 15:30
Imaging Air Cherenkov Telescopes, including the First G-APD Cherenkov Telescope (FACT), use
segmented reflectors. These offer large and fast apertures for little resources.
However, one challenge of segmented reflectors is the alignment of the single mirrors to gain a
sharp image. For Cherenkov telescopes, high spatial and temporal resolution is crucial to
reconstruct air shower events...
Thomas Bretz
(RWTH Aachen)
30/07/2015, 15:30
The FAMOUS telescope is a prove-of-concept study for the usage of
silicon based photo sensors (SiPMs) in fluorescence telescopes. Such
telescopes detect the fluorescence light emitted by ultra-high energy
cosmic ray particles impinging on the Earth's atmosphere. Available
instruments, like the fluorescence telescopes of the Pierre Auger Observatory in
Argentina, are using photo multiplier...
Francesco Loparco
(Universita e INFN, Bari (IT))
30/07/2015, 15:30
We have measured the gamma-ray emission spectrum of the Moon using a the data collected by the Large Area Telescope onboard the Fermi satellite during its first 77 months of operation, in an energy range from 30 MeV up to a few GeV. We have developed a full Monte Carlo simulation describing the interactions of cosmic rays with the Moon surface and the subsequent production of gamma rays using...
Nepomuk Otte
(Georgia Institute of Technology)
30/07/2015, 15:30
Low-cost and low-power digitization systems become increasingly important in particle-physics
and particle-astrophysics experiments as the number of channels is continuously rising. Specialized readout concepts have been developed in the past that aimed at lower costs and made detector systems with many ten thousand channels feasible. As the number
of channels in experiments is still on the...
Prof.
Huanyu Jia
(Southwest Jiaotong University)
30/07/2015, 15:30
The shadow that the Sun casts on high energy cosmic rays is affected by the interplanetary and solar magnetic fields and has been shown to vary according to the solar rotation and activity cycle. Using the data of the ARGO-YBJ experiment, a large-area air shower detector located at high mountain altitude (4300 m a.s.l., in Tibet, China), the deficit of \sim 5 TeV cosmic rays due to the Sun...
Patrick Kühl
(University of Kiel)
30/07/2015, 15:30
The solar modulation of galactic cosmic rays (GCR) can be studied in detail by long term variations of the GCR energy spectrum (e.g. on the scales of a solar cycle). With almost 20 years of data, the Electron Proton Helium INstrument (EPHIN) aboard SOHO is well suited for these kind of investigations.
Although the design of the instrument is optimized to measure proton and helium isotope...
Tova Yoast-Hull
(University of Wisconsin-Madison)
30/07/2015, 15:30
Regions of intense star-formation naturally generate high number densities of cosmic rays and as such, they are of particular interest as potential contributors to the extragalactic gamma-ray background (EGRB) and as potential sources of very high-energy cosmic rays (VHECRs). While models of the starburst contribution to the EGRB often assume cosmic rays are confined in starbursts, cosmic...
Mr
Rafal Wojaczynski
(Department of Astrophysics, University of Lodz)
30/07/2015, 15:30
We present results of the analysis of the Fermi-LAT data from low-luminosity Seyfert galaxies, whose X-ray spectra are consistent with predictions of the hot flow (ADAF) model. We use our precise hot flow model (fully GR and with a Monte Carlo computation of radiative processes) to fit the X-ray data and then we estimate the gamma-ray flux from hadronic processes in the two-temperature plasma...
Wlodek Bednarek
(University of Lodz)
30/07/2015, 15:30
We consider a simple scenario for the accretion of matter onto rotating, magnetised neutron star in order to understand the processes in the inner pulsar magnetosphere during the transition stage between different accretion modes. We analyse a quasi-spherical accretion process onto rotating, magnetized compact object in order to search for radiative signatures which could accompany the...
Michael DuVernois
(University of Wisconsin)
30/07/2015, 15:30
With recent exciting observations of astrophysical TeV- to PeV-energy neutrinos and new competitive measurements of GeV-energy atmospheric neutrino oscillations in the IceCube neutrino observatory at the South Pole, the design of a second generation Antarctic neutrino observatory, IceCube-Gen2, is underway. The design calls for two new instrumented volumes, one a denser in-fill array to extend...
Dr
Pankaj Kumar Shrivastava
(Govt.Model Science College,Rewa(M.P.))
30/07/2015, 15:30
The Coronal Mass Ejections generally occur in large numbers during the period of high solar activity carry large amount of 1025 J and 1013 kg of plasma into interplanetary medium]. The fast CMEs coming from the Sun into interplanetary space are the solar coronal features that contain high magnetic field having the capability to produce interplanetary disturbances. CMEs travelling at different...
Dr
Satoru Takahashi
(Kobe University)
30/07/2015, 15:30
The observation of high-energy cosmic gamma-rays provides us with direct information of high-energy phenomena in the universe. Currently, AGILE and Fermi-LAT are observing gamma-ray sky and many understandings are being brought to us. However, past and current observations have significant limitations. The improvement of angular resolution and polarization sensitivity is one of keys for a...
Mr
Keita OZAKI
(Kobe University)
30/07/2015, 15:30
GRAINE is a balloon-borne experiment to observe cosmic gamma-ray with precise angular resolution and polarization sensitivity.
Main gamma-ray detector is nuclear emulsion which can record three dimensional charged particle track with sub-micron position accuracy. We use multi-stage shifter technique in order to give time information to penetrating tracks of nuclear emulsion. Arrival...
Dr
Julie Saikia
(Pub Kamrup College)
30/07/2015, 15:30
Thermodynamic study is the common approach to understand dark energy (DE) and dark matter (DM) riddle. The respective approach is still not comparatively matured in loop quantum cosmology (LQC). Our present work follows the study of the status of generalized second law (GSL) in unified DE-DM dominated LQC scenario.
Heike Prokoph
(Linnaeus University)
30/07/2015, 15:30
Blazars are the most abundant class of known extragalactic very-high-energy (VHE, E>100 GeV) gamma-ray sources. However, one of the biggest difficulties in investigating their VHE emission resides in their limited number, since less then 60 of them are known by now.
In this contribution we report on the H.E.S.S. observations of the BL Lac object PKS 1440-389. This source has been selected...
Andrew Smith
(University of Maryland, College Park)
30/07/2015, 15:30
The High-Altitude Water Cherenkov (HAWC) Observatory was completed and began full operation in early 2015. The detector consists of an array of 300 water tanks, each containing ~200 tons of purified water and instrumented with 4 PMTs. Located at an elevation of 4100m a.s.l. near the Sierra Negra volcano in central Mexico, HAWC has a threshold for gamma-ray detection well below 1 TeV and a...
Tadahisa Tamura
(Kanagawa University (JP))
30/07/2015, 15:30
We will report testing and calibration of the heavy-ion energy and charge resolution of the CALET cosmic-ray instrument that will fly on the International Space Station in 2015. The beam tests were carried out using a test instrument that is functionally equivalent to CALET. CALET will measure the energy spectra and arrival directions of cosmic-ray electrons to 20 TeV and hadrons to 1 PeV with...
Jean-Francois Glicenstein
(CEA)
30/07/2015, 15:30
PKS 1830-211 is a lensed blazar located at z=2.5. The recent addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity towards low energies, providing access to gamma-ray energies down to 30 GeV. Data towards PKS1830-211 were taken with CT5 in August 2014, following a flare alert by the Fermi collaboration at the beginning of the month. The...
Mr
Dennis Soldin
(University of Wuppertal)
30/07/2015, 15:30
Cosmic ray air showers with primary energies above $\sim 1$ TeV can produce muons with high transverse momentum ($p_\mathrm{T} > 2$ GeV). These isolated muons can have large transverse separations from the shower core up to several hundred meters. Together with the muon bundle they form a double track signature in km$^3$-scale neutrino telescopes such as IceCube. These muons originate from the...
Piotr Banasiński
(University of Lodz)
30/07/2015, 15:30
During the quiet $\gamma$-ray state of blazars the high energy emission is likely to be produced in the extended part of the inner jet in which the conditions can change significantly. Therefore, homogeneous SSC model is not expected to describe correctly the quiet state emission features. We consider inhomogeneous SSC model for the large part of the inner jet in which synchrotron and IC...
Masaki Mori
(Ritsumeikan University)
30/07/2015, 15:30
The microquasar 1E 1740.7-2942, discovered by the Einstein satellite, is located near the Galactic Center at an angular distance of 50' from Sgr A*, and the brightest X-ray source above 20 keV in the Galactic Center region. It has extended radio lobes reaching distances of up to a few parsecs and its core radio emission is variable. In X-ray energies it shows the spectral and timing properties...
Dr
Olga Malandraki
(IAASARS, National Observatory of Athens, Athens, Greece)
30/07/2015, 15:30
Solar energetic particles are of prime astrophysical interest, but are also a space weather hazard motivating the development of predictive capabilities. The HORIZON 2020 project 'HESPERIA' will produce two novel Solar Energetic Particle (SEP) operational forecasting tools based upon proven concepts (UMASEP, REleASE). At the same time it will advance our understanding of the physical...
Patrick Kühl
(University of Kiel)
30/07/2015, 15:30
In order to improve the separation of helium isotopes 3He and 4He measured by the Electron Proton Helium Instrument (EPHIN) aboard the Solar and Heliospheric Observatory (SOHO), we used Monte Carlo simulations to understand the instrument’s response to incoming particles. The identification of different isotopes is based on the dE/dx-E-method. For an ideal telescope with the energy loss ΔE...
Xiaoting Qin
(Universita e INFN, Perugia (IT))
30/07/2015, 15:30
The AMS-02 detector is a large acceptance magnetic spectrometer operating on the International Space Station since May 2011. More than 60 billion events have been collected by the instrument as of today. One of the key subdetectors of AMS-02 is the silicon microstrip Tracker, designed to precisely measure the trajectory and absolute charge of cosmic rays in the GeV-TeV energy range. In...
Colin Baus
(KIT - Karlsruhe Institute of Technology (DE))
30/07/2015, 15:30
The inelastic cross section has been measured in proton-proton and proton-lead collisions at centre-of-mass energies per nucleon up to 8 TeV at the LHC. Nuclear scaling effects play an important role in the simulation of cosmic ray interactions and are studied in collisions with lead nuclei. Furthermore, the probability of diffractive interactions influences the efficiency of the energy...
Allan Labrador
(California Institute of Technology)
30/07/2015, 15:30
Mean ionic charge states for SEP events can reflect source temperatures, stripping during acceleration and transport, and the composition of source material. Multi-spacecraft measurements of mean ionic charge states for single SEP events can also demonstrate longitudinal dependence. At previous conferences, we have reported estimates of inferred high-energy ionic charge states for SEP events....
Ryuji Takeishi
(Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba, Japan)
30/07/2015, 15:30
The Pierre Auger Observatory (Auger) in Mendoza, Argentina and the Telescope Array (TA) in Utah, USA aim at unraveling the origin and nature of Ultra-High Energy Cosmic Rays (UHECR). At present, there appear to be subtle differences between Auger and TA results and interpretations. Joint working groups have been established and have already reported preliminary findings. From an experimental...
Yernar Tautayev
(Institute of Physics and Technology, Almaty, Kazakhstan)
30/07/2015, 15:30
Cosmic ray measurements are carried out on at a detector station located in the Tian Shan mountains at an altitude of 3340 meters above sea level using the complex installations "Hadron-9" and "Hadron-44". The main objective of these studies is the interaction of cosmic rays with nuclei, in particular the study of anomalous events occurring in the cores of extensive air showers (EAS). Analysis...
Prof.
Igor Yashin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
30/07/2015, 15:30
An excess of multi-muon events in comparison with simulations performed in frame of widely used hadron interaction models was found in several cosmic ray experiments at very- and ultra-high energies of primary particles. In order to solve this so-called ‘muon puzzle’, investigations of the energy characteristics of EAS muon component are required. A possible approach to such investigations is...
Dr
Semen Khokhlov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
30/07/2015, 15:30
Results of investigation of the near-horizontal muons are presented in the range of zenith angles of 85 – 95 degrees. In this range, so-called ‘albedo’ muons (atmospheric muons scattered in the soil into the upper hemisphere) are detected.
Measurements have been conducted with the NEVOD-DECOR experimental complex located on the campus of MEPhI. The basis of the complex is the Cherenkov water...
Eino Valtonen
(University of Turku)
30/07/2015, 15:30
We have surveyed the SOHO/ERNE data from the beginning of the mission until the end of 2014 for solar particle events with enhancements in the Fe/C and Fe/O intensity ratio in energy ranges 5-15 MeV per nucleon and 50-150 MeV per nucleon. We have studied the relative abundances and spectral properties of heavy ions (C, N, O, Ne, Mg, Si, S, Ca, Fe) in these events. We have also studied the...
Victor Martin-Lozano
(IFT-UAM/CSIC)
30/07/2015, 15:30
In this work we study the phenomenological aspects of Stückelberg portals where the mediator between the Standard Model and the dark matter (DM) is a massive Z' boson. Those scenarios are well motivated by certain string theory constructions and naturally lead to i sospin violating interactions of DM particles with nuclei. We show that within this construction the relations between the DM...
Karoly Kecskemety
(Wigner Research Centre, Budapest, Hungary)
30/07/2015, 15:30
Simultaneously with 27-day variations of Jovian electrons of MeV energies, observed during the deep solar minimum in 2007-2008 in 14 consequent solar rotations, short duration (2-3 days) enhancements of the fluxes of 0.1-1 MeV electrons and protons were registered. These enhancements took place at each solar rotation simultaneously at SOHO (EPHIN and LION) and ACE (EPAM) and appeared earlier...
Stephany Vargas
(Escuela Politécnica Nacional)
30/07/2015, 15:30
The Latin American Giant Observatory (LAGO) is an astroparticle network focused in the study of the phenomenology of Cosmics Rays (CR) in different energy ranges, using water Cherenkov Detectors(WCD). Ecuador has been working in the LAGO project for almost 3 years in which three detectors had been placed in different universities of the country (one in the city of Riobamba and two in the city...
Rahul Kumar
(Ben Gurion University)
30/07/2015, 15:30
The expected anisotropy in the 1 to 104 TeV energy range is calculated for Galactic cosmic rays with both anisotropy
in the diffusion tensor and source discreteness taken into account.We find that if the sources are distributed radially
(but with azimuthal symmetry) in proportion to Galactic pulsars, the expected anisotropy almost always exceeds
the observational limits by one order of...
Sun Zhandong
(Southwest Jiaotong University)
30/07/2015, 15:30
To fulfill the requirements of testing the photomultiplier tubes (PMTs) of the electromagnetic detector at the Large
High Altitude Air Shower Observatory, a multifunctional PMT test bench with a two-dimensional (2D) scanning
system is developed. With this 2D scanning system, 16 PMTs are scanned simultaneously to test their uniformity
and cathode transit time difference. The di-distance...
Dr
Chong Wang
(Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences)
30/07/2015, 15:30
Wide Field-of-view air Cherenkov Telescope Array (WFCTA) is an essential component of the Large High Altitude Air Shower Observatory (LHAASO). WFCTA comprises 24 movable identical telescopes specialized for measuring the energy spectrums of the cosmic ray ingredients. In this paper, we describe the synthesis optimization design of the optical system, including the mirror segments, the camera...
Karl-Heinz Kampert
(Universität Wuppertal)
30/07/2015, 15:30
As part of the Auger Engineering Radio Array, an extension of the Pierre Auger Observatory with antennas in the MHz range, it is necessary to monitor the local atmospheric conditions. These have a large influence on the radio emission induced by air showers. In particular, amplified signals up to an order of magnitude have been detected as an effect of thunderstorms. For a more detailed...
Mr
Mikhail Amelchakov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
30/07/2015, 15:30
The system of calibration telescopes (SCT) of the Cherenkov water detector (CWD) NEVOD is used as a shower array. SCT consists of two planes (80 m^2) with 40 scintillation counters (40×20×2 cm^3) in each. One plane is located on the roof of the CWD, and another one on its bottom. The distance between two planes is 9.45 m. Each registration channel of SCT is able to evaluate the counter...
Mr
LIU Cheng
(IHEP, CAS), Mr
QIAN Xiangli
(IHEP, CAS)
30/07/2015, 15:30
The underground muon detector with water Cherenkov technique is constructed as the upgrad of the Tibet air shower array, aiming at a higher sensitivity for gamma-ray observation. In one of the modules (MD-A), the full-sealing large Tyvek bag is used as a closed? container. As the MD-A has been operated for more than one year, the long term stability of the performance of such detector is reported.
Ms
Priyadarshini Bangale
(MPI for Physics, Munich)
30/07/2015, 15:30
M 87 is the closest extragalactic VHE object located in the Virgo cluster of galaxies at a distance of ~16 Mpc (redshift z=0.00436). It is the first and brightest radio galaxy detected in the TeV regime, well studied from radio to X-ray energies. The structure of its relativistic plasma jet, which is misaligned with respect to our line of sight, is spatially resolved in X-ray (Chandra),...
Prof.
Hanrong Wu
(Institute of High Energy Physics, CAS), Prof.
Huihai He
(Institute of High Energy Physics, CAS)
30/07/2015, 15:30
Detection of GeV photons from GRBs is crucial in understanding the most violent phenomenon in our universe. Due to the limited effective area of space-born experiment, very few GRBs are detected with GeV photons. Large area EAS experiments at high altitude can reach a much larger effective area around 10 GeV, for which single particle technique is usually used to lower the threshold energy but...
Francisco Diogo
(LIP (Lisboa))
30/07/2015, 15:30
In addition to the standard $X_\mathrm{max}$ and energy, the longitudinal profiles of extensive air showers contain some more interesting information. For energies above $10^{17.8}$ eV, we present the average profiles as a function of depth measured for the first time at the Pierre Auger Observatory. The profile shapes for different energy ranges are all well reproduced by a Gaisser-Hillas...
Wolfgang Menn
(University of Siegen)
30/07/2015, 15:30
The cosmic-ray hydrogen and helium (1H,2H,3He,4He) isotopic composition between 100 MeV/n and 1.4 GeV/n has been measured with the satellite-borne experiment PAMELA. The rare isotopes 2H and 3He in cosmic rays are believed to originate mainly from the interaction of high energy protons and helium with the galactic interstellar medium. The energy spectrum of these components carries...
Dr
Tescaro Diego
(Instituto de Astrofísica de Canarias, Tenerife, Spain)
30/07/2015, 15:30
One of the key characteristic of Alpha Magnetic Spectrometer (AMS-02) is its capability to measure the relative abundances and absolute fluxes of the nuclear components of the galactic cosmic rays (CRs), from hydrogen up to iron (Z=26), in a kinetic energy range from GeV/n to TeV/n. In this contribution we discuss the methodology for the precise identification ions with AMS-02, which is...
Andreas Obermeier
(Rheinisch-Westfaelische Tech. Hoch. (DE))
30/07/2015, 15:30
Since May 2011 the AMS-02 experiment is installed on the ISS and is observing cosmic radiation. It consists of several state-of-the-art sub-detectors, which redundantly measure charge and energy of traversing particles. Due to the long exposure time of AMS-02 of many years the measurement of cosmic-ray energy spectra is mainly limited not by statistics, but by detector response. The...
Hershal Pandya
(University of Delaware)
30/07/2015, 15:30
IceTop, the surface component of the IceCube Neutrino Observatory, detects air showers initiated by cosmic ray nuclei and gamma rays. The ground level muons are correlated with the energy and mass of the primary particle. This correlation is enhanced by resolving those muons which are produced early in the shower. The muon production depth (MPD) is reconstructed as a function of muon arrival...
Lev Pustilnik
(Israel Cosmic Ray Center, and Tel Aviv University)
30/07/2015, 15:30
Temperature effect of mountain muon detectors which exceeds a little that expected theoretically, was studied in this work. Meteorological effects of such detectors have their own peculiarities and practically were not investigated before. Data from multidirectional detectors YangBaJing, Moussala, Bure, Mt. Hermon, Yerevan (2000 м) were used for calculations from the created in IZMIRAN...
Blahoslav Pastirčák
(Institute of Experimental Physics SAS, Košice, Slovakia)
30/07/2015, 15:30
The SecondaryCR model evaluates particle fluxes and spectra of secondary
e-, e+, mu+, mu-, gammas, protons, neutrons, Cherenkov light etc. at
different positions, altitudes and times in the Earth atmosphere.
We developed this model of secondary cosmic rays production in the Earth's
atmosphere in the previous studies. It is based on existing models evaluating
particles transport in...
Konstantin Herbst
(Christian-Albrechts-Universität zu Kiel)
30/07/2015, 15:30
Cosmogenic radionuclides such as 10Be, 14C and 36Cl are a product of the interaction of high energetic primary cosmic ray particles, in particular galactic cosmic rays (GCR), with the Earth’s atmosphere. Because GCRs are modulated on their way through the interplanetary medium the GCR-induced production of these radionuclides is anti-correlated to the solar cycle. In addition, during phases of...
Matteo Sanguineti
(INFN Genova - Università di Genova)
30/07/2015, 15:30
The ANTARES detector is the largest neutrino telescope currently in operation in the North Hemisphere.
One of the main goals of the ANTARES telescope is the search for point-like neutrino sources. For this reason both the pointing accuracy and the angular resolution of the detector are important and a reliable way to evaluate these performances is needed.
One possibility to measure the...
Lew Classen
(University Erlangen-Nuremberg)
30/07/2015, 15:30
Following the first observation of astrophysical high-energy neutrinos by IceCube, planning for a next-generation neutrino detector at the South Pole is under way, which will expand IceCube's sensitivity both towards high and low neutrino energies. In parallel to upgrading the proven IceCube design, new optical sensor concepts are explored which have the potential to further significantly...
Peter Zelina
(University of Central Lancashire)
30/07/2015, 15:30
Solar Energetic Particles (SEPs) released during flares and coronal mass ejections can be detected by spacecraft widely separated in longitude. The mechanism by which this transport across the magnetic field takes place remains unclear.
Studies of SEP events simultaneously detected by multiple spacecraft have mostly focussed on electron and proton data. Here we consider multi-spacecraft...
Dr
Lucy Fortson
(University of Minnesota)
30/07/2015, 15:30
Intermediate-frequency-peaked BL Lacertae objects (IBLs) are a class of blazars characterized by a spectral energy distribution (SED) with a lower-energy synchrotron peak than a majority of extragalactic sources detected by ground-based imaging atmospheric Cherenkov telescopes (IACTs). Because of this shift in the SED, the peak gamma-ray flux falls outside the very-high-energy regime (VHE,...
Victor Zabalza
(University of Leicester)
30/07/2015, 15:30
The ultimate goal of the observation of nonthermal emission from astrophysical
sources is to understand the underlying particle acceleration and evolution
processes, and few tools are publicly available to infer the particle
distribution properties from the observed photon spectra from X-ray to VHE gamma
rays. Naima is an open source Python package that provides models for
non-thermal...
Simon Thomas
(University College London)
30/07/2015, 15:30
Galactic cosmic ray (GCR) flux is modulated by both particle drift patterns and solar wind structures on a range of time scales. Over solar cycles, GCR flux varies as a function of the total open solar magnetic flux and the latitudinal extent of the heliospheric current sheet. Over time-scales of hours, drops of a few percent in near-Earth GCR flux (Forbush decreases, FDs) are well known to be...
Jean-Francois Glicenstein
(CEA)
30/07/2015, 15:30
NectarCAM is a camera proposed for the medium-sized telescopes of the Cherenkov Telescope Array (CTA) covering the central energy range of ~100 GeV to ~30 TeV. It has a modular design and is based on the NECTAr chip, at the heart of which is a GHz sampling Switched Capacitor Array and 12-bit Analog to Digital converter. The camera will be equipped with 265 7-photomultiplier modules, covering...
Dr
Nikolay Volodichev
(D.V.Skobeltsyn Institute of Nuclear Physics, M.V.Lomonosov Moscow State University)
30/07/2015, 15:30
The results presented in the report are based on the measurements of thermal neutrons flux produced by the Earth’s surface during the experiment carried out in Pamir region at the altitude of 4200 m above sea level for the period from August 1 till August 14, 1994.
The neutrons in the Earth’s atmosphere are produced mainly during the interactions between the primary cosmic rays nucleons and...
Bayarto Lubsandorzhiev
(Institute for Nuclear Research of RAS)
30/07/2015, 15:30
We present new concepts of timing calibration systems for large-scale Cherenkov arrays in astroparticle physics experiments like Cherenkov arrays detecting extensive air showers (EAS) and water Cherenkov neutrino arrays. The concepts are based on a fast powerful LED light source on board of a pilotless remotely controlled helicopter in case of EAS Cherenkov arrays and on multiple LED sources...
James Beatty
(Ohio State University)
30/07/2015, 15:30
The surface detector array of the Pierre Auger Observatory consists of 1660 water Cherenkov
detectors that sample the charged particles and photons of air showers initiated by energetic
cosmic rays at the ground. Each detector records data locally with timing obtained from GPS
units and power from solar panels and batteries. In the framework of the planned upgrade of
the Auger Observatory,...
Marco Ricci
(Istituto Nazionale Fisica Nucleare Frascati (IT))
30/07/2015, 15:30
Donald Ngobeni
(Vaal University of Technology)
30/07/2015, 15:30
Low-energy galactic electrons (1-200 MeV) are significantly modulated, almost extraordinary, in the heliosheath in contrast to the rest of the heliosphere, indicating that modulation conditions in the heliosheath are quite different for these particles. In addition, Jovian electrons completely dominate galactic electrons at Earth below about 30 MeV. Low-energy protons and helium (1-100...
Mrs
Stefania Vitillo
(Universite de Genève)
30/07/2015, 15:30
The Alpha Magnetic Spectrometer (AMS-02) is an astroparticle physics detector installed on the International Space Station (ISS) on May 16th 2011 during the STS-134 NASA Endeavour Shuttle mission. The purpose of the experiment is to study with unprecedented precision and statistics charged particles and nuclei in an energy range from 0.5 GeV to few TeV. The AMS-02 Tracker System accurately...
Dr
Laurent Bouchet
(IRAP)
30/07/2015, 15:30
We present $^{26}Al$ map distribution throughout the Galaxy measured by the SPI spectrometer aboard the INTEGRAL observatory. This emission at 1.809 MeV is associated with the $^{26}Al$ decay and to the production of heavy elements in the Galaxy.
The only available $^{26}Al$ map to date has been released, more than fifteen years ago, thanks to the COMPTEL instrument.
However, at the...
Eino Valtonen
(University of Turku)
30/07/2015, 15:30
We investigate associations of solar energetic particle events with multiple solar eruptions incorporating both coronal mass ejections (CMEs) and intense flares. Searching through the time period from 1996 to the end of 2013 we found three series of eruptions with start times occurring in a time window of less than two days and consisting of at least three fast and wide CMEs from the same...
Lev Pustilnik
(Israel Cosmic Ray Center, and Tel Aviv University)
30/07/2015, 15:30
The discussion on the principal possibility of a causal chain from solar activity – Space Weather to the earth climate and up to agriculture response continues over 200 years (Herschel,1801). We show that the root of the critics of this possibility lies in the conception (accepted default) of the universality of the solar-terrestrial connection (STC). This default paradigm of universality of...
Prof.
Maria Giller
(University of Lodz)
30/07/2015, 15:30
We calculate analytically the correlation coefficient of the scattering angle and the lateral deflection for electrons being multiply scattered by small angles while losing energy.
We show that when average losses are assumed for the bremsstrahlung process the behaviour of the correlation coefficient with electron energy is completely different from that
when only the...
Dr
Olga Kryakunova
(Instutute of Ionosphere, Almaty, Kazakhstan)
30/07/2015, 15:30
Changes of indices of geomagnetic activity, and also cosmic ray density and anisotropy in high-speed streams of a solar wind from various solar coronal holes are studied. About 350 coronal holes observed in 1996-2013 were divided into groups taking into account their polarity and heliolatitude. It is shown that northern holes with negative polarity and the southern holes with positive polarity...
Max Ludwig Ahnen
(ETH Zurich)
30/07/2015, 15:30
The On-Off problem, aka. Li-Ma problem, is a statistical problem where a measured rate is the sum of two parts. The first is due to a signal and the second due to a background, both of which are unknown. Mostly frequentist solutions are being used, but they are only adequate for high count numbers. When the events are rare such an approximation is not good enough. Indeed, in high-energy...
Du Toit Strauss
(North-West University, South Africa)
30/07/2015, 15:30
Observations show that solar energetic particles, even those accelerated during smaller impulsive events, are transported very effectively across the background magnetic field; at 1 AU, particle intensities may extend up to 360 degrees in longitude in extreme cases. We present modeling results of such events, examining the effectiveness of mainly perpendicular diffusion. In our model, we...
Ulisses Barres
(Centro Brasileiro de Pesquisas Físicas)
30/07/2015, 15:30
n 2012, Fermi/LAT gamma-ray and radio observations have registered the largest ever recorded flaring episodes from the blazar Markarian 421.
The unprecedented activity state of the source has remained high, and much above the normal behaviour seem from the source also for the year 2013, characterising a dramatic and long-lasting change of behaviour in the emission of the object. This unique...
Dr
Alessandro Bruno
(Department of Physics, University of Bari, I-70126 Bari, Italy)
30/07/2015, 15:30
Data from the PAMELA satellite experiment were used to measure the geomagnetic cutoff for high-energy (above 80 MeV) protons during the solar particle events on 2006 December 13 and 14. The variations of the cutoff latitude as a function of rigidity were studied on relatively short timescales, corresponding to single spacecraft orbits (about 94 minutes). Estimated cutoff values were...
Dr
Alessandro Bruno
(Department of Physics, University of Bari, I-70126 Bari, Italy)
30/07/2015, 15:30
Data from the PAMELA satellite experiment were used to perform a detailed measurement of under-cutoff protons at low Earth orbit. On the basis of a trajectory tracing approach using a realistic description of the magnetosphere, protons were classified into geomagnetically trapped and albedo. The former includes stably-trapped protons in the South Atlantic Anomaly, which were analyzed in the...
Leonardo Dominguez
(Departamento de Computación de Alta Prestación - Comisión Nacional de Energía Atómica)
30/07/2015, 15:30
In this work we introduce different parallelization schemes implemented in the AIRES (AIR-shower Extended Simulations) software, in order to perform simulations, without thinning algorithm, in HPC clusters.
The AIRES's particle stack was modified to define a new structure allowing its parallelization using MPI library.
Adopting this new structure, three different parallelization tactics were...
Toshiyuki Nonaka
(Institute for Cosmic Ray Research, University of Tokyo)
30/07/2015, 15:30
Measurement of shower particles using scintillators at ground level, with different absorber thicknesses, enables detailed studies of the Telescope Array experiment’s energy scale and of hadronic interaction models. We designed and constructed two types of such detectors. In this report, we present their performance and operational status.
Dr
Jean-Laurent Dournaux
(GEPI. CNRS, Observatoire de Paris)
30/07/2015, 15:30
The Cherenkov Telescope Array (CTA) project aims to create the next generation Very High Energy gamma-ray telescope array. It will be devoted to the observation of gamma rays over a wide band of energy, from 20 GeV to 300 TeV. Two sites are foreseen, one in the northern and the other in the southern hemisphere, allowing the viewing of the whole sky. The southern site will be equipped with...
Dr
Deliang Zhang
(University of Science and Technology of China)
30/07/2015, 15:30
The DAMPE (DArk Matter Particle Explorer) is a scientific satellite mainly aimed at indirectly searching for dark matter in space. One critical sub-detector of the DAMPE payload is an electromagnetic calorimeter, which consists of 308 BGO (Bismuth Germanate Oxid) crystal bars and 616 PMTs (photomultiplier tubes), for precisely measuring the energy of cosmic rays from 5 GeV to 10 TeV. The...
608.
Performance studies of the new stereoscopic Sum-Trigger-II of MAGIC after one year of operation
Dr
Francesco Dazzi
(Max-Planck-Institute for Physics Munich)
30/07/2015, 15:30
MAGIC is a stereoscopic system of two Imaging Air Cherenkov Telescopes (IACTs) located at La Palma (Canary Islands, Spain) and working in the field of very high energy gamma-ray astronomy. It makes use of a traditional digital trigger with an energy threshold of around 55 GeV. A novel trigger strategy, based on the analogue sum of signals from partially overlapped patches of pixels, leads to a...
Alexandre Creusot
(Universite de Paris VII (FR))
30/07/2015, 15:30
The KM3NeT collaboration aims to build a km3-scale neutrino telescope in the Mediterranean Sea. The first phase of construction comprises the deep-sea and onshore infrastructures at the KM3NeT-It (100 km offshore Capo Passero, Italy) and KM3NeT-Fr (40 km offshore Toulon, France) sites and the installation of 31+7 detection units. For the next step (KM3NeT 2.0) completion of two detectors are...
Markus Holler
(LLR - Ecole Polytechnique)
30/07/2015, 15:30
The High Energy Stereoscopic System (H.E.S.S.) is an array of five Imaging Atmospheric Cherenkov Telescopes (IACTs) designed to detect and image cosmogenic gamma-rays with very high energies. Originally consisting of just four identical IACTs (CT1-4) with an effective mirror diameter of 12$\,$m each, it was expanded with a fifth IACT (CT5) with a mirror diameter of 28$\,$m in 2012. Being the...
Carsten Rott
(Sungkyunkwan University),
Debanjan Bose
(Sungkyunkwan University)
30/07/2015, 15:30
IceCube is the world’s largest neutrino telescope located at the geographic South Pole, that utilizes more than 5000 optical sensors to observe Cherenkov light from neutrino interactions. A hot water drill was used to melt holes in the ultra-pure Antarctic ice, in which strings of optical sensors were deployed at a depth of 1500m to 2500m. The recent observation of high energy neutrinos...
Karel Kudela
(IEP SAS Kosice, Slovakia)
30/07/2015, 15:30
The main scientific task of JEM-EUSO is to observe the ultra high energy cosmic rays by looking the atmosphere from space. On one hand the detailed description and study of various sources of the background is important (e.g. Bertaina et al., 2014). On the other hand, the study of selected magnetospheric and ionospheric processes leading to temporal and spatial variability of UV on the orbit...
Dr
Brian Flint Rauch
(NASA-Natl. Aeronaut. & Space Admin. (US))
30/07/2015, 15:30
The CALorimetric Electron Telescope (CALET) is a Japanese-Italian-US astroparticle observatory expected to be installed on the ISS in 2015. The main calorimeter (CAL) on CALET is comprised from top to bottom of a charge detector (CHD) with two crossed layers of scintillator paddles, an imaging calorimeter (IMC) with planes of scintillating fibers interleaved with tungsten sheets, and a total...
Dustin Hebecker
(Humboldt Universität zu Berlin / DESY)
30/07/2015, 15:30
We report on the development of a photon sensor sensitive to single photons that employs wavelength-shifting and light-guiding techniques to maximize the collection area and to minimize the dark noise rate. The sensor is tailored towards applications in ice-Cherenkov neutrino detectors using inert and cold, low-radioactivity and UV transparent ice as a detection medium, such as IceCube-Gen2 or...
Sun Zhandong
(Southwest Jiaotong University)
30/07/2015, 15:30
A prototype array for the LHAASO-KM2A, which consists of 39 detector units, was set up at the Yangbajing cosmic ray observatory(4300m a.s.l., Tibet, P.R. China) and has been in stable operation since Octoter 2014. In this paper, we present the performances of the prototype electromagnetic particle detector and the prototype array.
Yernar Tautayev
(Institute of Physics and Technology, Almaty, Kazakhstan)
30/07/2015, 15:30
Estimation of physical properties of exited fireball from complex final pattern of produced particles is key challenge in nucleus-nucleus collisions at high energies. Effective way to better understanding and interpretation of results consists in analyses of interaction of smaller systems, created in proton-proton or in proton-nucleus collisions.On the basis of such approach interactions of...
Prof.
Bernd Heber
(University of Kiel),
Patrick Kühl
(University of Kiel)
30/07/2015, 15:30
Ground Level Enhancements (GLEs) are solar energetic particle (SEP) events that are recorded by ground-based instrumentation. The energy of the particles is so high that they produce secondary particles, i.e. protons and neutrons, which are detected as sudden increases in cosmic ray intensities measured by e.g. neutron monitors. Since the launch of SOHO in December 1995 the neutron monitor...
Dr
Zhaoyang Feng
(IHEP,CAS)
30/07/2015, 15:30
In order to study ultra-high-energy cosmic-ray (UHECR) sources, we need not only to know their direction, energy and chemical composition, but also large statistics of experimental data, which requires that the detector should have a large effective area and a high duty cycle. Radio antennas present some attractive aspects in this perspective, with very low unit costs, easiness of deployment...
Dr
Rolf Bütikofer
(Physikalisches Institut, University of Bern / HFSJG, Bern, Switzerland)
30/07/2015, 15:30
The investigation of solar cosmic ray events based on neutron monitor measurements requires detailed knowledge about the trajectories of charged particles in the Earth's magnetic field. This information is needed with a high time resolution and for the current level of disturbance of the geomagnetic field. The determination of cutoff rigidities and asymptotic directions by the standard...
Dr
Nachiketa Chakraborty
(Max-Planck-Institut fuer Kernphysik)
30/07/2015, 15:30
Flaring states of the BL Lac object, Mrk 501 were observed by the High Energy Stereoscopic System (H.E.S.S.) during 2012 and 2014. Observations in 2014 recorded flux levels higher than one Crab unit and revealed rapid variability at very high energies ($\sim$ 2-20 TeV). The high statistics afforded by the flares allowed us to probe the presence of minutes timescale variability and study its...
Gregory Richards
(Georgia Institute of Technology)
30/07/2015, 15:30
In recent years, the Fermi-LAT gamma-ray telescope has detected a population of over 160 gamma-ray pulsars, which has enabled the detailed study of gamma-ray emission from pulsars at energies above 100 MeV. Further, since the surprising detection of the Crab pulsar in very high-energy (VHE; E > 100 GeV) gamma rays by the MAGIC and VERITAS collaborations, there has been an ongoing effort in the...
Dr
Paolo Goldoni
(APC/CEA-Irfu)
30/07/2015, 15:30
Blazars are active galactic nuclei, and the most numerous High Energy (HE) and Very High Energy (VHE)gamma-ray emitters. Their optical emission is often dominated by non-thermal, and, in the case of BL Lacs, featureless continuum radiation. This renders the determination of their redshift extremely difficult. Indeed as of today only about 50% of gamma-ray blazars have a measured spectroscopic...
Temir Zharaspayev
(National Research Nuclear University MEPhI)
30/07/2015, 15:30
Various local geophysical phenomena, like thunderstorms and earthquakes can be the cause for particle precipitation from Earth radiation belt. Longitudinal particle drift period is known to be dependent from its energy, due to this fact: using particles energy spectrum data change in time, it is possible to determine distances between locations of precipitation and registration on board of...
Mr
Ramin Marx
(MPIK Heidelberg)
30/07/2015, 15:30
The Cherenkov Telescope Array (CTA) will be a ground-based gamma-ray observatory with full-sky coverage in the very-high energy (VHE) regime. It is proposed to consist of more than 100 telescopes and should produce large amounts of data, possibly exceeding the volume of current VHE Imaging Atmospheric Cherenkov Telescopes by ~two orders of magnitude. This volume of data represents a new...
tokonatsu yamamoto
(Konan University)
30/07/2015, 15:30
Hard X-ray bremsstrahlung, gamma-ray lines, and >100 MeV gamma-ray emission were observed by Fermi during a 50 s burst from the M2-class X-ray flare (Ackermann et. 2012). The neutron-capture line was also observed (25 gamma/cm2 indicating that tens of MeV neutrons were produced at the Sun. From this measurement we estimate that the neutron fluence at Earth would have been about 5 neutrons/cm2...
Dr
Tobias Winchen
(Bergische Universität Wuppertal)
30/07/2015, 15:30
Energy-dependent patterns in the arrival directions of cosmic rays could arise from deflections in galactic and extragalactic magnetic fields. We report on searches for such patterns in the data of the surface detector of the Pierre Auger Observatory at energies above E = 5 EeV in regions within approximately 15° of the arrival directions of events with energy E > 60 EeV. No significant...
Prof.
Tokonatsu Yamamoto
(Konan Univeristy)
30/07/2015, 15:30
We report a search for 12.5 GHz microwave radiation from electron beams in the atmosphere. Ultrahigh-energy cosmic rays (UHECRs) are observed indirectly through extensive air showers (EASs) by particle detectors on the ground or fluorescence detectors using a remote sensing method. If isotropic radiation of microwave from EAS is detected, it can be used for future observation of the UHECR...
Katsuya Yamazaki
(University of Tokyo)
30/07/2015, 15:30
In order to understand sources of ultra high energy cosmic rays, we search for ultra high energy photons with the Telescope Array experiment. The Telescope Array is a hybrid detector consisting of an array of scintillation detectors, which measure the lateral profile of air showers, and fluorescence detectors, which measure the longitudinal profile of air showers. This information is used to...
TOSHIHIRO FUJII
(University of Chicago, University of Tokyo)
30/07/2015, 15:30
Ultra-relativistic magnetic monopoles, possibly a relic of phase transitions in the early universe, would deposit an amount of energy comparable to UHECRs in their passage through the atmosphere, producing highly distinctive air shower profiles. We have performed a search for ultra-relativistic magnetic monopoles in the sample of air showers with profiles measured by the Fluorescence Detector...
marcos lopez
(University Complutense of Madrid)
30/07/2015, 15:30
Geminga pulsar appears to be one of the most promising candidates to emit VHE gamma-ray pulsed emission.
In order to detect the third pulsar with power-law spectral component above of the measured cutoff,
after Crab and Vela, we analyzed 63 hours of data taken with MAGIC. To discuss the connection with
HE gamma rays, 6 years of Fermi-LAT data were also analyzed. No significant pulsation was...
Prof.
Rostislav Kokoulin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
30/07/2015, 15:30
Experimental data accumulated in a 3-year long series of measurements (from May 2012 to April 2015) of cosmic ray muon bundles with the coordinate-tracking detector DECOR are analyzed. It has been found that the measured rate of the events exhibits clear seasonal variations, repeated every year of observations. The amplitude of the first annual harmonic of the event rate has been estimated as...
Saptashwa Bhattacharyya
(Waseda University)
30/07/2015, 15:30
Future space based experiments such as CALET and DAMPE will measure the electron and positron cosmic-ray spectrum with better energy resolution and up to higher energy, making detection of small features in the spectrum, which might originate from Dark Matter annihilation or decay in the galactic halo, possible. For precise prediction of these features, the numerical cosmic ray propagation...
Dr
Bo Gao
(Institute of High Energy Physics,CAS), Dr
Hanrong Wu
(Institute of High Energy Physics,CAS), Mr
Huicai Li
(Naikai University), Dr
Mingjun Chen
(Institute of High Energy Physics,CAS), Prof.
Zhiguo Yao
(Institute of High Energy Physics,CAS)
30/07/2015, 15:30
The Large High Altitude Air Shower Observatory (LHAASO) will be constructed at Mt. Haizi in Sichuan Provice, China. As a major component of the LHAASO project, the Water Cherenkov Detector Array (WCDA) is designed to record air showers produced by cosmic rays and gamma rays in the energy range from 100 GeV to 100 TeV. Complementing the Imaging Atmospheric Cherenkov Telescopes with large...
Anita Reimer
(University of Innsbruck)
30/07/2015, 15:30
The non-thermal spectra of jetted Active Galactic Nuclei
(AGN) show a variety of shapes and degrees of curvature in
their low and high energy components. From some of the
brightest Fermi-LAT blazars prominent spectral breaks at
a few GeV have been regularly detected which is
inconsistent with conventional cooling effects. We
propose that the broad variety of spectral shapes
including...
Prof.
Kazuoki Munakata
(Shinshu University, Nagano, Japan)
30/07/2015, 15:30
The IceCube experiment presented in 2012 the declination dependence of the first and second harmonic coefficients of the sidereal cosmic-ray anisotropy at 20 TeV and 400 TeV. In this presentation, we calculate the coefficients for the comic ray data observed by the Tibet ASgamma experiment at median energies of 12 TeV and 300 TeV during a period between November 1999 and May 2010. By using...
Alexander Ziegler
(ECAP, University of Erlangen-Nuremberg, Germany)
30/07/2015, 15:30
Observations of the Galactic Center with the H.E.S.S. instrument have led to the detection of an extended region of diffuse TeV $\gamma$-ray emission.
The origin of this emission is not yet fully understood, although the spatial correlation between the density distribution of giant molecular clouds located at the center of our Galaxy and the intensity of the observed $\gamma$-ray excess...
Yosui Akaike
(University of Tokyo (JP))
30/07/2015, 15:30
CALorimetric Electron Telescope (CALET) is a detector for the precise measurement of cosmic ray electrons, gamma-rays and nuclei on the International Space Station. CALET has an imaging and a thick calorimeter, which provide excellent energy resolution and particle identification. For the on-orbit calibration, we plan to use the minimum ionizing particles of cosmic rays such as protons and...
Dr
Andrii Tykhonov
(Universite de Geneve (CH))
30/07/2015, 15:30
An overview is given for the offline software framework and reconstruction software of the DAMPE (DArk Matter Particle Explorer) gamma-ray telescope. DAMPE is one of the five satellite missions in the framework of the Strategic Pioneer Research Program in Space Science of the Chinese Academy of Sciences, with a launch date scheduled for the fall 2015. The telescope consists of silicon-tungsten...
Stephen Kahler
(Air Force Research Laboratory)
30/07/2015, 15:30
Prompt onsets and short rise times to peak intensities Ip have been noted in a few solar energetic (E > 10 MeV) particle (SEP) events from far behind the west limb. We discuss 14 archival and recent examples of these prompt events, giving their source longitudes, onset and rise times, and associated CME speeds. Their timescales and CME properties are not exceptional in comparison to a larger...
Eino Valtonen
(University of Turku)
30/07/2015, 15:30
We investigate occurrence and characteristics of solar energetic particle (SEP) events related to full halo coronal mass ejections (FHCMEs) from source locations close to the central meridian of the Sun. From the halo CME catalog of Gopalswamy et al (2010) we selected CMEs detected between 1996 and end of 2014 which originated from source locations between longitudes E10 and W10 and divided...
tokonatsu yamamoto
(Konan University)
30/07/2015, 15:30
In association with three large solar flares observed in 2012 March 5th (X1.1), 7th (X5.4) and 9th (M6.3), the solar neutron detector SEDA-FIB onboard the International Space Station has detected several events from solar direction. In this paper we present the time profiles of those neutrons and discuss the physics that may be related with a possible acceleration scenario of ions over the...
Dr
Grigory Protopopov
(Branch JSC URSC-ISDE)
30/07/2015, 15:30
In the paper we are presenting processing results of flight data from METEOR-M spacecraft, which are been supplying in the Roscosmos space radiation exposure on electronic components Monitoring System by Fedorov Institute of Applied Geophysics. METEOR-M spacecraft operates in polar orbit 832 km altitude with inclination of ~99 degrees. The spacecraft contains spectrometers to measure particle...
Renier Burger
(North-West University)
30/07/2015, 15:30
Ab initio modulation models require a number of turbulence quantities as input for any reasonable diffusion tensor. While turbulence transport models describe the radial evolution of such quantities, they in turn require observations in the inner heliosphere as input values. To study long-term modulation requires turbulence data over at a least a solar magnetic cycle. As a start we analyze...
Michael DuVernois
(University of Wisconsin)
30/07/2015, 15:30
The Askaryan Radio Array (ARA) is an ultra-high energy >100 PeV cosmic neutrino detector which is in phased construction near the South Pole. ARA searches for radio Cherenkov-like emission from particle cascades induced by neutrino interactions in the ice using radio frequency antennas (~150-800MHz) deployed at a design depth of 200m in the Antarctic ice. A prototype ARA Testbed station was...
Mr
Johannes Schulz
(Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, The Netherlands)
30/07/2015, 15:30
The Auger Engineering Radio Array (AERA) is a low-energy extension of the Pierre Auger Observatory. It is used to detect radio emission from extensive air showers in the 30 - 80 MHz frequency band. A focus of interest is the dependence of the radio emission on shower parameters such as the energy and the distance to the shower maximum. After three phases of deployment, AERA now consists of 153...
Bo Gao
(Institute of High Energy Physics, Chinese Academy of Sciences), Dr
Mingjun Chen
(Institute of High Energy Physics, Chinese Academy of Sciences)
30/07/2015, 15:30
A Large High Altitude Air Shower Observatory (LHAASO) is planned to be built in next year. As an important component of LHAASO project, Water Cherenkov Detector Array (WCDA) is a high sensitivity gamma ray and cosmic ray detector, which is mainly to survey the northern sky for VHE gamma ray sources. Currently, the R&D is quite finished, including a prototype water Cherenkov detector and an...
Mr
Jon Paul Lundquist
(Telescope Array Project)
30/07/2015, 15:30
The seven year Telescope Array (TA) Middle Drum hybrid composition measurement shows agreement between Ultra-High Energy Cosmic Ray (UHECR) data and a light composition obtained with QGSJetII-03 or QGSJet-01c models. The data are incompatible with a pure iron composition, for all models examined, for energies log10(E/eV)>18.2. This is consistent with previous TA results. This analysis is...
Mr
RAJIV KUMAR
(GOVERNMENT PENCH VALLEY POST GRADUATE COLLEGE PARASIA)
30/07/2015, 15:30
A detailed investigation on geoeffectiveness of Coronal Mass Ejections [CMEs] associated with Magnetic Clouds [ MCs ] observed during 1996-2009 have been studied. The collected sample events are divided into two groups based on their association with CMEs related to geomagnetic storms, Dst ≤ -50 nT eg. 1. geoeffective events & 2. For nongeoeffective events, Dst ≥ -50 nT. Other field parameters...
Prof.
Luobu Danzeng
(Tibet University), Prof.
Tianlu Chen
(Tibet University)
30/07/2015, 15:30
Sub-100GeV to TeV is a crucial energy window in gamma ray astronomy because of its important role connecting the space experiments and the ground-based observations. The observations in this energy range are expected to provide rich information about the high energy emission from GRBs and AGNs, with which EBL can be measured, and knowledge about the galaxy formation and the evolution of the...
Javier Gonzalez
(Bartol Research Institute, Univ Delaware)
30/07/2015, 15:30
In this contribution we will consider the methods at our disposal to estimate the mass of primary cosmic rays on an event-by-event basis using IceTop, the surface component of the IceCube detector at the geographical South Pole. We reconstruct the events using two lateral distribution functions, one for the muon component and one for the electrons and gamma rays. This results in a few...
Karoly Kecskemety
(Wigner Research Centre, Budapest, Hungary)
30/07/2015, 15:30
Ion energy spectra and abundance ratios were studied in 0.04-2 MeV/nucleon ion fluxes using ACE/ULEIS data during the solar minimum between solar cycles 23 and 24. The unique prolonged minimum of 2006-2009 permitted to select 35 quiet time periods when suprathermal ion fluxes from near equatorial coronal holes (CH) were observed at 1 AU. The values of relative ion abundances indicate the...
Dr
Francesco de Palma
(INFN and Pegaso University)
30/07/2015, 15:30
While supernova remnants (SNRs) are widely thought to be powerful cosmic-ray accelerators, indirect evidence comes from a small number of well-studied cases. Here we systematically determine the gamma-ray emission detected by the Fermi Large Area Telescope (LAT) from all known Galactic SNRs, disentangling them from the sea of cosmic-ray generated photons in the Galactic plane. Using LAT data...
Prof.
Leonid Kuzmichev
(SINP MSU)
30/07/2015, 15:30
The aim of the TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) is to construct in the Tunka Valley (50 km from Lake Baikal) a complex, hybrid array for multi–TeV gamma-ray astronomy and CR studies. The array will consist of a wide angle Cherenkov array - Tunka-HiSCORE with ~3 km2 area, a net of IACT telescopes and muon detectors with total area of up to 2000 m2....
Prof.
Jiwoo Nam
(LeCosPA and Department of Physics, National Taiwan University)
30/07/2015, 15:30
TAROGE is an antenna array on the high mountains of Taiwan’s east coast for the detection of ultra-high energy cosmic ray (UHECR) in energy above 10^19 eV. The antennas will point toward the ocean to detect radiowave signals emitted by the UHECR-induced air-shower as a result of its interaction with the geomagnetic field. Looking down from the coastal mountain, the effective area is enhanced...
Dr
Thomas Stroman
(University of Utah), Dr
Yuichiro Tameda
(Institute for Cosmic Ray Research, University of Tokyo)
30/07/2015, 15:30
The chemical composition of ultra-high-energy cosmic rays (UHECRs) affects the observable distribution of air-shower $X_{\rm max}$ values, the atmospheric slant depth at which the number of secondary shower particles reaches its maximum. The observed $X_{\rm max}$ distributions at various primary UHECR energies can be compared with the distributions predicted by detailed detector simulations...
Anatoly Ivanov
(Shafer Institute for Cosmophysical Research & Aeronomy)
30/07/2015, 15:30
Arrival directions of ultra-high energy cosmic rays (UHECRs) exhibit mainly isotropic distribution with a hint of small deviations in particular energy bins. In this paper available UHECR data are tested for circular uniformity of arrival directions using methods developed in directional statistics.
Wlodek Bednarek
(University of Lodz)
30/07/2015, 15:30
Recently very energetic millisecond pulsar, J1823-3021A, has been discovered to emit pulsed GeV gamma-rays in the globular cluster NGC 6624. Assuming that this pulsar injects relativisitic leptons into its surrounding (as expected from modelling of radiative processes within the inner pulsar magnetosphere), we calculate the minimum level of expected TeV gamma-ray emission produced by these...
Dr
Brian Wundheiler
(Instituto de Tecnologías en Detección y Astropartículas)
30/07/2015, 15:30
The AMIGA enhancement (Auger Muons and Infill for
the Ground Array) of the Pierre Auger Observatory consists of a 23.5 km$^2$
infill area where air shower particles are sampled by water-Cherenkov
detectors at the surface and by 30 m$^2$ scintillation counters
buried 2.3 m underground. The Engineering Array of AMIGA, completed since
February 2015, includes 37 scintillator modules (290...
Veronique Van Elewyck
(Universite Paris Diderot)
30/07/2015, 15:30
KM3NeT is a network of deep-sea neutrino telescopes to be deployed in the Mediterranean Sea, that will perform neutrino astronomy and oscillation studies. It consists of three-dimensional arrays of thousands of optical modules that detect the Cherenkov light induced by charged particles resulting from the interaction of a neutrino with the surrounding medium.
The performance of the...
John Krizmanic
(USRA/CRESST/NASA/GSFC)
30/07/2015, 15:30
The Non-Imaging CHErenkov Array (NICHE) will eventually measure the flux and nuclear composition of cosmic rays from below $10^{15}$ eV to $10^{18}$ eV by using measurements of the amplitude and time-spread of the air-shower Cherenkov signal to achieve a robust event-by-event measurement of XMax and energy. NICHE will have sufficient area and angular acceptance to have significant overlap with...
Douglas Bergman
(University of Utah)
30/07/2015, 15:30
Observing UHECR air showers in stereo mode provides a precise measurement of their longitudinal profiles. The Gaisser-Hillas function fits air shower profiles well on average. The range of shower widths can be sensitive to details of average inelasticity and multiplicity in the early part of the shower. Such a measurement can then also be used to constrain the interaction models used in...
Mr
Mohammad Sabouhi
(Department of Physics , Semnan University, P.O. Box 35196-45399, Semnan, Iran)
30/07/2015, 15:30
Abstract: Different type of mechanisms are involved in generation and propagation of radio signals from cosmic ray air showers. The geomagnetic origin is one of such mechanisms which is very important especially in low frequency band studies. Based on CORSIKA and CoREAS we investigate the influence of earth magnetic field parameter on filtered peak radio amplitude patterns in 32–64 MHz...
Mr
Satoshi Tsuchida
(Ritsumeikan University)
30/07/2015, 15:30
The Kaluza-Klein (KK) particles, which are the feasible candidate for the dark matter, produce electrons and positrons when they annihilate in the Galactic halo. When the electrons and positrons propagate in the Universe, their direction is randomaized by the Galactic magnetic field, and energy is reduced by some energy loss mechanisms. We calculate the electron and positron spectrum expected...
Andrea De Franco
(University of Oxford)
30/07/2015, 15:30
The Gamma-ray Cherenkov Telescope (GCT) is proposed to be part of the Small Size Telescope (SST) array of CTA (the Cherenkov Telescope Array).
Its dual mirror optical design allows the use of a compact camera of diameter roughly 0.4m, the curved focal plane of which is equipped
with 2048 pixels of ~0.2° angular size, resulting in a field of view of ~9°.
The GCT camera is designed to...
Dr
Troy Porter
(Stanford University)
30/07/2015, 15:30
The Fast Radiation transport Numerical Kalculation for Interstellar Emission (FRaNKIE) code is a Monte Carlo code for calculating the electromagnetic emissions in galaxies. The code is highly parallel and optimised for both CPUs and co-processor accelerators. The code takes into account the interaction of the photon field with the interstellar medium in a self-consistent way, providing a...
Christian Sarmiento-Cano
(Universidad Industrial de Santander)
30/07/2015, 15:30
The Space Weather program of the Latin American Giant Observatory (LAGO) is based on the installation of single or small arrays of water-Cherenkov detectors (WCD) spanned across Latin America. The Guane Array is one of the LAGO detection network nodes and it is located in the city of Bucaramanga, Colombia, at $986$ m a.s.l. The array is composed of three autonomous LAGO WCD installed at the...
Dr
Fabian Schüssler
(Irfu, CEA-Saclay)
30/07/2015, 15:30
Based on fundamental particle physics processes like the production and subsequent decay of pions in interactions of high-energy particles, close connections exist between the acceleration sites of high-energy cosmic rays and the emission of high-energy gamma rays, high-energy neutrinos and other messengers like gravitational waves. In most cases these connections provide both spatial and...
Oleh Kobzar
(Institute of Nuclear Physics, Polish Academy of Sciences)
30/07/2015, 15:30
Active galactic nuclei (AGN) are considered as one of the most appropriate sources of cosmic rays with energy exceeding $~\sim 10^{18}~$eV. Virgo$~$A (M87 or NGC 4486) is the second closest to the Milky Way active galaxy. According to existing estimations it can be a prominent source of ultra high energy cosmic rays (UHECR). However not many events have been registered in the sky region near...
Dr
Daan van Eijk
(Nikhef),
R Bruijn
(Nikhef)
30/07/2015, 15:30
The KM3NeT collaboration is currently constructing the first phase of a
cubic kilometer-scale neutrino detector in the Mediterranean Sea. The basic detection
element, the Digital Optical Module (DOM), houses 31 three-inch PMT’s inside
a 17 inch glass sphere. This multi-PMT concept yields a factor three increase in
photocathode area, compared to a design with a single 10 inch PMT,...
Christian Sarmiento-Cano
(Universidad Industrial de Santander)
30/07/2015, 15:30
The Latin American Giant Observatory (LAGO) is an extended Cosmic Ray (CR) observatory operating in nine Latin American countries. Within the LAGO framework, several scientific and academic programs are being developed and conducted. One of them, the LAGO Space Weather program, aims to produce real time, high time resolution and high quality data of the flux of secondary particles at each site...
Justin Bray
(University of Manchester)
30/07/2015, 15:30
The lunar Askaryan technique, which involves searching for Askaryan radio pulses from particle cascades in the outer layers of the Moon, is a method for using the lunar surface as an extremely large detector of ultra-high-energy particles. The high time resolution required to detect these pulses, which have a duration of around a nanosecond, puts this technique in a regime quite different...
Dr
Alberto Dominguez
(Clemson University)
30/07/2015, 15:30
The extragalactic background light (EBL) contains fundamental cosmological and galaxy evolution information. Very high energy observations of extragalactic sources, such as blazars, can be used to extract this information because of the pair-production interaction between gamma-ray and EBL photons. We present (almost) simultaneous broad-band data of a dozen BL Lacs that allow us to make the...
Prof.
Paul Kooijman
(University of Amsterdam)
30/07/2015, 15:30
In this paper we provide a detailed description of the mechanical structure of the 750 m high KM3NeT detection unit. The choices made for the different materials and their behaviour under the loads expected during deployment an during the lifetime of the experiment will be discussed, as will the motion of the unit under influence of the sea currents. The unique method of deployment, which...
Jean-Noël CAPDEVIELLE
(CNRS)
30/07/2015, 15:30
GHOST (1) is .an extension of HDPM (Hybrid dual parton model) originally implemented in CORSIKA(2). It reproduces the pseudo-rapidity charged distribution for NSD events measured by LHCb, CMS and TOTEM …up to √s = 8TeV. At this energy, two pairs of normal generators are centered symmetrically, respectively at small rapidity 1.05 and mid rapidity 4.1, with respective widths 0.95 and 1.8 units...
Christine Peters
(RWTH Aachen University)
30/07/2015, 15:30
Precise measurements of the muon content of extensive air showers are essential for the identification of the chemical composition of ultra-high-energy cosmic rays. We therefore propose a new scintillator detector prototype, the Aachen Muon Detector (AMD). It can complement existing ground arrays composed of e.g. water Cherenkov detector stations. The detector consists of 64 scintillator tiles...
Douglas Bergman
(University of Utah)
30/07/2015, 15:30
The Non-Imaging CHErenkov Array (NICHE) will be a low energy extension to Telescope Array and TALE using an array of closely spaced (~200 m) light collectors covering an area of ~2 square km. It will be deployed in the field of view of TALE and will overlap it in energy range. Showers with energies 1-100 PeV will be reconstructed using both the Cherenkov light Lateral Distribution and the...
Dr
Alexander Karelin
(NRNU MEPhI)
30/07/2015, 15:30
The north-south asymmetry of galactic cosmic rays has been measured in the PAMELA experiment during the time period 2010-2014. Inside this period the solar magnetic field has been flipped. This gave the opportunity to follow the variation of the asymmetry effect. The variation of high energy cosmic rays ratio for particles arriving from Nord and South has been measured with aid of PAMELA...
Mr
Satoshi Tsuchida
(Ritsumeikan University)
30/07/2015, 15:30
The lightest Kaluza-Klein particle (LKP), which appears in the theory of universal extra dimensions, is one of the good candidates for cold dark matter. We assume the LKP mass ranges from 500 GeV to 1000 GeV. We focus on the LKP annihilation modes which contain gamma-rays as final products. The gamma-ray spectrum from LKP annihilation has a characteristic peak structure near the LKP mass...
Dr
Alberto Carramiñana Alonso
(INAOE)
30/07/2015, 15:30
The Latin American Giant Observatory (LAGO) is an extended cosmic ray observatory, which consists in a wide network of water Cherenkov detectors (WCDs) located in nine different countries. The geographic distribution of the LAGO sites, with different altitudes and geomagnetic rigidity cut-offs, combined with the new electronic system for control, atmospheric sensing and data acquisition on...
Dr
Sergey Aleksandrin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
30/07/2015, 15:30
Dynamics of flux of high-energy charged particles trapped by geomagnetic field has been studied in this paper. As is known the Earth's magnetic field changes in direction and magnitude, as a result of this the South Atlantic Anomaly (SAA) region drifts. Using data of satellite experiments ARINA and VSPLESK geographical distributions of proton flux (80-100 MeV) were studied since 2006 to 2014....
Ruben Lopez-Coto
(Institut de Fisica d'Altes Energies - IFAE)
30/07/2015, 15:30
Imaging atmospheric Cherenkov telescopes such as the MAGIC telescopes are built to achieve the lowest possible energy threshold. The trigger system of these telescopes is one of the most important parts to achieve it. The main problem when decreasing the energy triggered by an IACT is the rapid increase of accidental triggers caused by the ambient light and the after pulses of the...
Mario Pimenta
(LIP Laboratorio de Instrumentaco e Fisica Experimental de Particulas)
30/07/2015, 15:30
In this work we study the energy evolution of the number of muons in air showers. Motivated by future plans for UHECR experiments, the analysis developed here focus on how the evolution of the moments of the shower observables distributions (Xmax and the number of muons at ground) can be used to assess the validity of a mass composition scenario, surpassing the current uncertainties on the...
Dr
Masato TAKITA
(Institute for Cosmic Ray Research, the University of Tokyo)
30/07/2015, 15:30
We plan to build a large (approximately 10,000 m**2) water Cherenkov-
type muon detector array under the existing Tibet air shower array at
4,300 m above sea level, to observe 10-1000 TeV gamma rays from
cosmic-ray accelerators in our Galaxy with wide field of view
at very low background level. A gamma-ray induced air shower has
significantly less muons compared with a cosmic-ray induced...
Dr
Leonid Tkachev
(JINR, Dubna)
30/07/2015, 15:30
The TUS space experiment is aimed to study energy spectrum and arrival distribution of UHECR at energy range above 1020 eV by the measurement of the EAS fluorescent radiation in atmosphere. The TUS mission is planned for launch at the end of 2015 at the dedicated “Lomonosov” satellite. TUSSIM program package was developed to simulate the TUS detector performance including the Fresnel mirror...
Elisa Prandini
(University of Geneva)
30/07/2015, 15:30
The blazar PG1553+113 is an active galaxy with uncertain redshift detected at very high energies (VHE; E > 100 GeV) both during high and quiescent states. We have observed with the MAGIC telescopes from La Palma PG 1553+113 at VHE since 2005, making this blazar one of the best studied MAGIC sources.
Recently, the Fermi/LAT collaboration has reported the detection of a hint of a ~2-year...
Bair Shaybonov
(JINR)
30/07/2015, 15:30
The first stage of the Baikal-GVD neutrino telescope will be composed of more than two thousand light sensors, Optical Modules (OMs), installed deep underwater in Lake Baikal. We describe developed calibration methods which use OM LEDs, the calibration laser source, atmospheric muons etc. and discuss the performance of these methods.
Ignacio Minaya
(urn:Google)
30/07/2015, 15:30
The asymmetry in the risetime of signals in Auger surface detector stations with respect to the direction of an incoming air shower is a source of information on shower development. The asymmetry is due to a combination of the longitudinal evolution of the shower and geometrical effects related to the angles of incidence of the particles into the detectors. The magnitude of the effect depends...
Dr
Bo Gao
(Institute of High Energy Physics, Chinese Academy of Sciences), Dr
Hanrong Wu
(Institute of High Energy Physics, Chinese Academy of Sciences), Mr
Huicai Li
(School of Physics, Nankai University), Dr
Mingjun Chen
(Institute of High Energy Physics, Chinese Academy of Sciences), Ms
Xiaojie Wang
(Institute of High Energy Physics, Chinese Academy of Sciences), Prof.
Zhiguo Yao
(Institute of High Energy Physics, Chinese Academy of Sciences)
30/07/2015, 15:30
As a major component of the LHAASO project, the main physical goal of the Water Cherenkov Detector Array (WCDA) is to survey the northen sky for VHE gamma ray sources. One of the key issues to fulfill this goal is the angular resolution and the pointing precision of the detector, which depends much on the time calibration of the whole array. In this paper, a new time calibration technique...
Matteo Duranti
(Universita e INFN, Perugia (IT))
30/07/2015, 15:30
In this contribution we present the calculation of a realistic, time dependent geomagnetic cutoff along the International Space Station orbit, at ?400 km above the Earth?s surface with an inclination of 51.6 degrees. For this work, based on the analysis of data collected by the AMS02 experiment during the first year of operation, the TS05 and IGRF models have been employed, including the...
Dr
Mieke Bouwhuis
(NIKHEF)
30/07/2015, 15:30
The KM3NeT neutrino telescope is a next generation Cherenkov array containing thousands of optical modules being installed in deep sea at a depth larger than 2500 m and more than 40 km distance from the shore. For the precise event reconstruction sub-nanosecond precision synchronization between modules is required. Its realization exploits the White Rabbit system to synchronize clocks between...
Vladimir Mikhailov
(NRNU MEPHI)
30/07/2015, 15:30
The PAMELA and the ARINA experiments onboard satellite RESURS-DK1 are carried out since 2006 up to now. PAMELA instrument in the first place is intended to measure of high energy antiparticles in cosmic rays while main purpose of the ARINA instrument is study of high-energy charged particle bursts in the magnetosphere. Both these experiments have possibility to study protons in the inner...
Pavel Motloch
(University of Chicago)
30/07/2015, 15:30
Detection of transition radiation from neutrino-induced showers escaping a dense medium is a
promising technique which might be employed in future generations of ultra-high energy
neutrino detectors. Using the well-known Zas-Halzen-Stanev (ZHS) Monte Carlo simulation,
we have computed the electric field created by showers crossing a dense medium-air interface.
Our calculations show that...
Dr
Bo Gao
(IHEP, Beijing), Dr
Hanrong Wu
(IHEP, Beijing), Mr
Huicai Li
(School of Physics, Univeristy of Nankai), Dr
Mingjun Chen
(IHEP, Beijing), Ms
Xiaojie Wang
(IHEP, Beijing), Prof.
Zhiguo Yao
(IHEP, Beijing)
30/07/2015, 15:30
The Water Cherenkov Detector Array (WCDA) of the LHAASO project is to be built in Daocheng, Sichuan Province of China. It comprises of 4 neighboring ponds, each in dimension of 150 m $\times$ 150 m, and divided into 900 cells, with a PMT in each cell. A triggerless scheme is to be adopted for the data acquiring system, in which all the single channel signals are synchronized and transferred to...
Dr
Vladimir Makhmutov
(Lebedev Physical Institute of the Russian Academy of Sciences)
30/07/2015, 15:30
We present and discuss the cosmic ray increases detected with the CARPET cosmic ray instruments during several solar flares in 2011-2013. The CARPET cosmic ray detectors were installed at El Leoncito Astronomical Complex (CASLEO; Argentina) in 2006 and at CERN (Switzerland) in 2009. We compare the CARPET data with the X-ray and proton data from GOES and Fermi LAT/GBM measurements as well as...
Dr
Donghwa Kang
(Karlsruhe Institute of Technology)
30/07/2015, 15:30
KASCADE-Grande was a multi-detector array to measure individual air showers of cosmic rays in the energy range of 10 PeV up to 1 EeV. Based on full data sets measured by KASCADE-Grande, an upper limit to the flux of ultra-high energy gamma rays in primary cosmic rays is determined. The analysis is performed by selecting air showers with low muon contents due to a small fraction of secondary...
Henrike Fleischhack
(DESY)
30/07/2015, 15:30
The cores of Ultra-Luminous InfraRed Galaxies (ULIRGs) are very dense environments, with a high rate of star formation and hence supernova explosions. They are thought to be sites of cosmic-ray acceleration, and are predicted to emit $\gamma$-rays in the GeV to TeV range. So far, no ULIRG has been detected in $\gamma$-rays. Arp 220, the closest ULIRG to Earth, has been well studied, and...
David Kieda
(University of Utah)
30/07/2015, 15:30
In this talk, we report the VERITAS discovery of very high energy (E > 100 GeV) gamma ray emission from RGB J2243+204, previously detected in radio and X-ray. This source is also consistent with the Fermi-LAT gamma-ray source 1FHL J2244.0+2020. RGB J2243+204 has been classified both as an intermediate-frequency-peaked BL Lac object and as a high-frequency-peaked BL Lac object in the past....
Matteo Cerruti
(Harvard-Smithsonian Center for Astrophysics)
30/07/2015, 15:30
The high-frequency-peaked BL Lac object 1ES 0806+524 (z=0.138) was discovered as a source of very-high-energy (VHE, E>100 GeV) gamma-ray photons in 2008 with the VERITAS telescope array, at a level of 1.8% of the Crab Nebula flux above 300 GeV. Since then, VERITAS has continued observing the source over multiple seasons, significantly improving the significance of the detection. We report the...
Karlen Shahinyan
(University of Minnesota)
30/07/2015, 15:30
HESS J1943+213 is a very-high-energy (VHE; > 100 GeV) gamma-ray point source detected during the H.E.S.S. Galactic Plane Survey. Radio, infrared, X-ray, and GeV gamma-ray counterparts have been identified for HESS J1943+213; however, the classification of the source is still uncertain. Recent publications have argued primarily in favor of either an extreme BL Lac object behind the Galactic...
Dr
Bo Gao
(Institute of High Energy Physics, CAS), Prof.
Chunxu Yu
(School of Physics, Nankai University), Dr
Hanrong Wu
(Institute of High Energy Physics, CAS), Mr
Huicai Li
(School of Physics, Nankai University), Dr
Mingjun Chen
(Institute of High Energy Physics, CAS), Ms
Xiaojie Wang
(Institute of High Energy Physics, CAS), Prof.
Zhiguo Yao
(Institute of High Energy Physics, CAS)
30/07/2015, 15:30
The Large High Altitude Air Shower Observatory (LHAASO) project is to be built at Daocheng, Sichuan Province, 4400 m a.s.l., in a few years. As one of the major components of the LHAASO project, LHAASO-WCDA, a water Cherenkov detector array with an area of 90000 m2, contains around 400,000 tons of purified water. To gain full knowledge of the water Cherenkov technique and to investigate the...
Prof.
Edward Stone
(Caltech)
30/07/2015, 16:30
After a thirty-five year journey, Voyager 1 began observing the properties on the very local interstellar medium on August 25, 2012, at a radial distance of 121.6 AU. Now at 132 AU, Voyager 1 has been exploring the region where the interstellar wind and magnetic field are perturbed by the flow of interstellar ions around the heliosphere and the formation of a wall of H atoms. The plasma...
Mathieu de Naurois
(CNRS)
30/07/2015, 17:00
After nearly a decade of operation, the three major arrays of atmospheric Cherenkov telescopes have revolutionized our view of the Very High Energy Universe, unveiling more than 100 sources of various types. MAGIC, consisting of two 17m diameter telescopes on the Canary island of La Palma, and VERITAS, with four 12m telescopes installed in southern Arizona, USA, largely explored the...
Miguel Pato
(OKC Stockholm)
30/07/2015, 17:30
The presence of dark matter in spiral galaxies was inferred long ago by measuring the rotational speed of the gas across each galaxy. Applying the same technique to the Milky Way, a spiral itself, is much more challenging due to our peculiar position and thus the Galactic distribution of dark matter remains poorly constrained to this day. In this talk, I shall introduce two important...
Samuel Ting
(Massachusetts Inst. of Technology (US))
30/07/2015, 18:00
In four years on the International Space Station, the AMS experiment has collected more than 65 billion cosmic rays up to TeV energies. The latest results will be summarized.
Prof.
Felix Aharonian
(DIAS Ireland and MPI Heidelberg)
31/07/2015, 09:00
Gamma-rays observations are believed to play a crucial role in the solution to the long standing problem of origin of cosmic rays (CRs). The results obtained over the last decade with the space and ground based detectors have demonstrated the great potential of gamma-ray astronomy, in particular in the context of the search and identification of major contributors to the flux of...
Dr
Richard Tuffs
(Max-Planck-Institut fuer Kernphysik)
31/07/2015, 11:00
We present a solution for the interstellar radiation fields
(ISRF) in the Milky Way from UV to submm wavelengths
based on axisymmetric radiation transfer modelling of the
panchromatic SED of the galaxy in direct and dust-reradiated
starlight as constrained by all-sky imaging by the
IRAS, COBE and Planck satellites. This is the first self-consistent
model of the spatial and spectral...
Chris Gordon
(University of Canterbury)
31/07/2015, 11:00
The High-Energy Stereoscopic System (HESS) has detected diffuse TeV emission correlated
with the distribution of molecular gas along the Ridge at the Galactic Center. Diffuse, nonthermal
emission is also seen by the Fermi large area telescope (Fermi-LAT) in the GeV range
and by radio telescopes in the GHz range. Additionally, there is a distinct, spherically symmetric excess of gamma rays...
Dr
Emiliano Mocchiutti
(INFN, Sezione di Trieste, Italy),
Vladimir Mikhailov
(NRNU MEPHI)
31/07/2015, 11:00
Precise measurements of electron and positron fluxes in energy range from 80 MeV to several GeV below the geomagnetic cutoff rigidity were carried out using the PAMELA magnetic spectrometer. The instrument was launched on June 15th 2006 onboard the Resurs-DK satellite on an orbit with the inclination 70 degrees and the altitude 350-600 km. It is continue to collect data so far. The...
Stefan Ferreira
(North-West University)
31/07/2015, 11:00
The time-dependent modulation of galactic cosmic rays in the heliosphere is studied over different polarity cycles by computing 2.5 GV proton intensities using a two-dimensional, time-dependent modulation model. By incorporating recent theoretical advances in the relevant transport parameters in the model we showed in previous work that this approach gave realistic computed intensities over a...
Prof.
Glennys Farrar
(New York University)
31/07/2015, 11:00
Our understanding of the Galactic magnetic field (GMF) has improved tremendously in recent years. The Jansson-Farrar (2012) (JF12) GMF model is currently the most realistic and comprehensive model available. It was constrained by fitting all-sky Faraday Rotation Measures of ~40k extragalactic sources, simultaneously with WMAP polarized (Q,U) and total synchrotron emission maps, which together...
Gero Müller
(Phys. Institute 3A, RWTH Aachen University)
31/07/2015, 11:15
We propose to perform an independent test of recent galactic magnetic
field parameterizations, and to obtain information on the origin of
cosmic rays. Based on 3D simulations of cosmic nuclei from their sources
to observation, we determine the average expected arrival direction for
protons. As energy decreases, the average direction is expected to move
away from the source line of...
Dr
Troy Porter
(Stanford University)
31/07/2015, 11:15
The inner region of the Milky Way is one of the most interesting and complex regions of the gamma-ray sky. The intense interstellar emission and resolved point sources, as well as potential contributions by other sources such as unresolved source populations and dark matter, complicate the interpretation of the data. In this talk, we report on the Fermi-LAT team analysis of a 15x15 degree...
Prof.
Jacek Niemiec
(Institute of Nuclear Physics PAN, Krakow, Poland)
31/07/2015, 11:15
The nearly circular band of energetic neutral atom (ENA) emission dominating the
field of view of the Interplanetary Boundary EXplorer satellite (IBEX), is most
commonly attributed to the effect of charge exchange of secondary pickup ions
(PUIs) gyrating about the magnetic field in the outer heliosheath and the
interstellar space beyond.
The main difficulty with this model is the problem...
Vladimir Mikhailov
(NRNU MEPHI)
31/07/2015, 11:15
The PAMELA magnetic spectrometer is continuously gathering data about cosmic ray positrons and electrons on board the Resurs DK satellite since July 2006. Below about 10 GeV cosmic rays are strongly modified by charge-sign dependent solar modulation effects.
In this work the time variation of the positron fraction as observed by the PAMELA experiment is presented. The large data set, about...
Ms
Xilu Wang
(University of Illinois at Urbana and Champaign)
31/07/2015, 11:15
A Galactic type Ia supernova(SN Ia) event would go entirely unnoticed to us due to the large optical extinction in the Milky Way plane, the weak neutrinos signal from a SN Ia, as well as the dim soft X-rays signal. But the recent SN2014J confirms that SN Ia emit gamma-ray lines, which lasts for weeks, from the 56Ni → 56Co → 56Fe decay. The lines span from 158 keV to 2.6 MeV, which occur just...
Dr
Yanping Chen
(NYU Abu Dhabi)
31/07/2015, 11:30
Studies discerning whether there is a significant correlation between UHECR arrival directions and optical AGN are hampered by the lack of a uniformly selected and complete all-sky AGN catalog. To remedy this, we are preparing such a catalog based on the 2MASS Redshift Survey (2MRS), a spectroscopic sample of ~45,000 galaxies complete to a K magnitude of 11.75 over 91% of the sky. We have...
Behrouz Khiali
(University of São Paulo)
31/07/2015, 11:30
Cosmic Ray (CR) acceleration is still challenging in high energy astrophysics. A first-order Fermi mechanism within magnetic reconnection layers has been demonstrated to be a powerful CR accelerator in recent studies. In this work we have investigated this acceleration process in the nuclear region of radio-galaxies and microquasars and found that the very high energy (VHE) emission from these...
Du Toit Strauss
(North-West University, South Africa)
31/07/2015, 11:30
When the Voyager 1 spacecraft crossed the heliopause, energetic particle observations showed unexpectedly large anisotropies in the local interstellar medium. For high energy galactic cosmic rays, the anisotropy is such that a deficiency of particles near pitch-angles of 90 degrees was recorded. For low energy anomalous cosmic rays, the anisotropy is completely different; an enhancement near...
Matteo Duranti
(Universita e INFN, Perugia (IT))
31/07/2015, 11:30
We present a measurement of the cosmic ray (e$^{+}$+e$^{−}$) flux in the range 0.5 GeV to 1 TeV based on the analysis of 10.6 million (e$^{+}$+e$^{−}$) events collected by AMS. The statistics and the resolution of AMS provide a precision measurement of the flux. The flux is smooth and reveals new and distinct information. AMS measurements of individual e$^{+}$ and e$^{−}$ fluxes show neither...
Francesca Calore
(University of Amsterdam)
31/07/2015, 11:30
Recently, a spatially extended excess of gamma rays collected by the *Fermi*-LAT from the inner region of the Milky Way has been claimed by different and independent groups. I will present a robust characterisation of the morphology and spectral properties of such an extended diffuse emission, including systematic uncertainties that are related to the high density of cosmic rays, gas, magnetic...
Dr
Xiaocheng Guo
(University of Alabama in Huntsville)
31/07/2015, 11:45
We investigate the possibility of the modulation of galactic cosmic ray (GCR) in the outer heliosheath (OHS) by means of the numerical simulations. The transport of GCR in the heliosphere is simulated by solving the Parker transport equation through a stochastic method, and the plasma background of the heliosphere is obtained from a global MHD-neutral simulation. The results confirm that no...
Dr
Alfredo Urbano
(SISSA - International School for Advanced Studies)
31/07/2015, 11:45
A GeV gamma-ray excess has possibly been individuated in Fermi-LAT data from the Galactic Center, and interpreted in terms of Dark Matter annihilations, either in hadronic or leptonic channels.
However, the identification of such an excess strongly relies on the capability of carefully assessing the background over which the excess is supposed to emerge. For this reason, it is crucial to...
Andrei Kounine
(Massachusetts Inst. of Technology (US))
31/07/2015, 11:45
A precision measurement by AMS of the positron fraction in primary cosmic rays in the energy range from 0.5 to 500 GeV based on 10.9 million positron and electron events is presented. The measured positron fraction shows a rapid decrease from 1 to ∼8 GeV followed by a steady increase and reaching a maximum value at 275+-32 GeV. The new results show, for the first time, that above ~275 GeV the...
Luís H. S. Kadowaki
(University of Sao Paulo (IAG-USP))
31/07/2015, 11:45
Fast magnetic reconnection events can be a very powerful mechanism operating in the core region of microquasars and active galactic nuclei (AGNs). In earlier work, it has been suggested that the power released by fast reconnection events between the magnetic field lines lifting from the inner accretion disk region and the lines anchored into the central black hole (BH) could accelerate...
Radomir Smida
(Karlsruhe Institute of Technology)
31/07/2015, 11:45
Arrival directions of ultra-high energy cosmic rays
from the direction to one of the brightest radio source Virgo A were studied with recent models of the Galactic magnetic field. The obtained image of this radiogalaxy is similar for all studied models and it is unique in the comparison with images of other
possible point source candidates. We present a method suitable for identifying cosmic...
Gregory Tarle
(University of Michigan),
JIm Musser
(Indiana University), Mr
Joseph Gennaro
(U. Michigan), Dr
Mathew Geske
(Penn. State U.), Dr
Michael Schubnell
(U. Michigan), Prof.
Muller Dietrich
(U. Chicago), Prof.
Scott Nutter
(N. Kentucky U.), Prof.
Scott Wakely
(U. Chicago),
Stephane Coutu
(Penn State University),
nahee park
(University of Chicago)
31/07/2015, 12:00
Electrons at energies greater that 1 TeV must originate in the local Galactic neighborhood, within a kpc or so, owing to their rapid energy loss rates during propagation. Only a few candidate acceleration sites exist within this horizon, such as the Vela, Monogem or Cygnus Loop supernova remnants, and thus a measurement of the multi-TeV cosmic-ray electron flux would be a very useful probe of...
Prof.
Wlodek Bednarek
(University of Lodz)
31/07/2015, 12:00
The central engines in active galaxies are immersed in huge central stellar clusters and also surrounded by spherical halos with radii of a few tens of kpc containing from a few hundred up to several tausend globular clusters. We investigate the acceleration of particles on the shocks formed in collisions of different compact objects at the kpc distances with jet plasma. We show that...
880.
Northern sky Galactic Cosmic Ray anisotropy between 10-1000 TeV with the Tibet Air Shower Array
Zhaoyang Feng
(IHEP)
31/07/2015, 12:00
We report on the observation of the large-scale sidereal anisotropy of Galactic Cosmic Rays (GCRs) between 10 TeV and 1 PeV, with the data collected by the Tibet Air Shower experiment between October 1995 and February 2010. The energy resolution is improved and the data with zenith angle up to 60 degrees is used.The two-dimensional intensity map with declination from -30 degree to 90 degree at...
Christoph Weniger
(University of Amsterdam)
31/07/2015, 12:00
We present a new, powerful and background-independent technique to constrain the luminosity function of point source populations that might contribute to the observed GeV excess emission around the Galactic center. Using this technique, we search for indications of such a population in the latest Fermi LAT data and discuss, for the case of milli-second pulsars, the implications for...
Dr
David Staszak
(McGill University)
31/07/2015, 12:15
Cosmic-ray electrons and positrons (CREs) at GeV-TeV energies are a unique probe of our local Galactic neighborhood. CREs lose energy rapidly via inverse Compton scattering and synchrotron processes while propagating in the Galaxy, effectively placing a maximal propagation distance for TeV electrons of order $\sim$1 kpc. Within this window, production of CREs can come from a handful of known,...
Dr
Noemie Globus
(Tel-Aviv University)
31/07/2015, 12:15
We present a simple theoretical and phenomenological model accounting for the evolution of the cosmic-ray spectrum and composition with energy, based on the available data over the entire spectrum. We show that there is no need to postulate any additional component, other than one single Galactic component depending on rigidity alone, and one extragalactic component, whose characteristics are...
Mr
Adrian Vogt
(University of Kiel)
31/07/2015, 12:15
Although the main processes are well known, the transport of charged particles in the inner heliosphere is still under investigation. Because of a GPU-accelerated algorithm to solve Parker's transport equation by means of stochastic differential equations (SDEs), our newly developed code offers the possibility to perform extensive parameter studies. In this study we use counting rates of...
Matthieu Kieffer
(LPNHE, Paris)
31/07/2015, 12:15
Most of results from astrophysical observations point to a 27% contribution of non-baryonic dark matter to the mass-energy budget of the universe. Although still undetermined, strongly motivated candidates in form of weakly interactive massive particles could explain its nature and their annihilations or decays would give rise to detectable signatures in gamma rays. In 2012, the H.E.S.S....
Prof.
Soebur Razzaque
(University of Johannesburg)
31/07/2015, 12:15
Gamma-ray bursts (GRBs), the most powerful sources of gamma rays in the universe, have been detected at energies up to 95 GeV. This energy is at the verge of what is known as the Very High Energy (VHE, above 100 GeV) emission regime. VHE sources are targets for currently running and upcoming ground-based Cherenkov telescopes. It is therefore very important to understand the VHE emission...
Kenichi Sakai
(NASA/GSFC/CRESST/UMBC)
31/07/2015, 14:00
The energy spectra of cosmic-ray protons and helium near solar minimum were precisely measured with BESS-Polar II (Balloon-borne Experiment with a Superconducting Spectrometer) during a long-duration flight over Antarctica in December 2007 and January 2008.The absolute fluxes and spectral shapes of primary protons and helium probe the origin and the propagation history of cosmic rays in the...
Dr
Razmik Mirzoyan
(Max-Planck-Institute for Physics)
31/07/2015, 14:00
Abstract
MAGIC is a ground-based astrophysics instrument for measuring gamma rays in the energy range ~ 35 GeV – 50 TeV. It is the first instrument, which paved the road into the sub-100 GeV gamma-ray sky. MAGIC consists of two 17m diameter, F/1.03 imaging atmospheric Cherenkov telescopes, which are separated by 85m distance and are located at 2200m a.s.l. in the Roque de los Muchachos...
Michael Unger
(NYU & KIT)
31/07/2015, 14:00
The atmospheric depth $X_\mathrm{max}$ at which the particle number of an air shower
reaches its maximum is a good indicator for the mass of the
primary particle. We present a comparison of the energy evolution
of the mean of $X_\mathrm{max}$ as measured by the Telescope Array and Pierre
Auger Collaborations. After accounting for the different resolutions,
acceptances and analysis...
Katsuki Hiraide
(the University of Tokyo)
31/07/2015, 14:00
XMASS-I, the first phase of the XMASS project, is a direct detection dark matter
experiment using 832 kg of liquid xenon at Kamioka in Japan. One of the signatures
of dark matter in direct detection experiments is the annual modulation of the
event rate due to the relative motion of the Earth around the Sun. We have continuously
collected data with a low trigger threshold of 0.3 keVee for...
Ken Clark
(University of Toronto)
31/07/2015, 14:00
Scientists have created the world's largest neutrino telescope, the IceCube Neutrino Observatory, in one of the planet’s most extreme environments at South Pole Station Antarctica. Completed in 2010, and instrumenting more than a cubic-kilometre of ice, IceCube also includes a low-energy detector array, called DeepCore, that has performed world-leading indirect dark matter searches and very...
Dr
Alexey Yushkov
(University of Siegen)
31/07/2015, 14:15
We report for the first time on the measurement of the correlation between the depth of shower maximum and the signal in water-Cherenkov stations for events reconstructed by both the fluorescence and surface detectors of the Pierre Auger Observatory. Such a correlated measurement is a unique feature of a hybrid air shower observatory and allows us to determine the purity of the cosmic-ray...
Dr
Nicolas PICOT-CLEMENTE
(Institute for Physical Science and Technology, University of Maryland)
31/07/2015, 14:15
The Balloon-Borne Experiment with a Superconducting Spectrometer (BESS-Polar II) flew successfully over Antarctica for 24.5 days in December 2007 through January 2008 during a period of minimum Solar activity. BESS-Polar II is configured with a solenoidal superconducting magnet and a suite of various particle detectors. It allows to accurately identify hydrogen and helium isotopes among the...
Dr
Darko Veberic
(Karlsruhe Institute of Technology (DE))
31/07/2015, 14:15
In case dark matter consists of hidden-sector photons which kinetically mix with regular photons, a tiny oscillating electric-field component is present wherever we have dark matter. In the surface of conducting materials this induces a small amount of radiation being emitted almost perpendicular to the surface, with the corresponding photon frequency approximately matching the mass of the...
Gareth Hughes
(ETH Zurich)
31/07/2015, 14:15
Markarian 501 is a nearby (z=0.034) Very High Energy (>100GeV, VHE) emitting high-synchrotron-peaked BL Lac object. It is the third source discovered at VHE, by the Whipple Telescope in 1996, and it has been regularly observed since then. From 2008 onward, these observations have taken the form of organized multi-wavelength (MWL) campaigns where the source has been monitored for several...
Dr
Holger Motz
(Waseda University)
31/07/2015, 14:30
The Calorimetric Electron Telescope (CALET) will be launched to the ISS within this year and measure the energy and direction distribution of electron+positron cosmic rays well into the TeV range during a 5 year mission. With a 1:10$^5$ proton rejection rate and an energy resolution of 2%, it is capable of detecting even small features in the spectrum. Combining the measurement of the total...
Vitaly Choutko
(Massachusetts Inst. of Technology (US))
31/07/2015, 14:30
A precision measurement of the proton flux in primary cosmic rays with rigidity 1 GV to 1.8 TV is presented based on 300 million events. The results show that proton flux is smooth and exhibits no sharp structures with rigidity. The detailed variation with rigidity of the flux spectral index is presented for the first time. The spectral index is progressively hardening at high rigidities.
John Belz
(University of Utah)
31/07/2015, 14:30
We study the chemical composition of ultrahigh energy cosmic rays primarily using the Xmax technique. The reconstruction techniques use events either seen by two of the TA fluorescence detectors (stereo mode), or by one fluorescence detector, and one fluorescence detector and the TA surface detector (hybrid mode). Each technique has its own acceptance imprinted on the data. We compare the...
Emma de Ona Wilhelmi
(CSIC-IEEC)
31/07/2015, 14:30
The last six years have witnessed major revisions of our knowledge about the Crab Pulsar, the central engine of the remnant of the supernova explosion that occurred in 1054 AD. The pulsed high-energy emission is believed to be due to synchrotron-curvature radiation in the pulsar magnetosphere, reaching a maximum energy of a few hundreds of GeV. However, new measurements obtained with the MAGIC...
Ruben Lopez-Coto
(Institut de Fisica d'Altes Energies - IFAE)
31/07/2015, 14:45
The pulsar wind nebula (PWN) 3C 58 has been proposed as a good candidate for detection at VHE (VHE; E>100 GeV) for many years. It is powered by one of the highest spin-down power pulsars known (5% of Crab pulsar) and it has been compared to the Crab Nebula due to its morphology. This object was previously observed by imaging atmospheric Cherenkov telescopes (Whipple, VERITAS and MAGIC), and...
Dr
Alessio Porcelli
(Universite de Geneve (CH))
31/07/2015, 14:45
For the first time the Pierre Auger Collaboration presents $\langle X_\mathrm{max}\rangle$ and $\sigma(X_\mathrm{max})$ measurements covering nearly three decades of energy. In this analysis we include new $X_\mathrm{max}$ data obtained with the Pierre Auger High Elevation Fluorescence Telescopes (HEAT) enhancement. The HEAT telescopes cover a field of view ranging from $30^\circ$ to...
Sadakazu Haino
(Academia Sinica (TW))
31/07/2015, 14:45
A precision measurement of the Helium flux in primary cosmic rays with rigidity 2 GV to 3 TV is presented based on 50 million events. The detailed variation with rigidity of the spectral index is presented for the first time. The helium spectral index is progressively hardening at high rigidities. The precise ratio of the proton to Helium flux is also presented. Surprisingly, above ~25 GV...
Valentina Gallo
(Universite de Geneve (CH))
31/07/2015, 14:45
The DAMPE (DArk Matter Particle Explorer) is one of the five satellite missions in the framework of the Strategic Pioneer Research Program in Space Science of the Chinese Academy of Science (CAS).
DAMPE is a powerful space telescope for high energy gamma-rays, electrons and cosmic rays detection.
The detector consists of a double layer of plastic scintillator strips detector (PSD) that...
Erik Blaufuss
(University Of Maryland)
31/07/2015, 14:54
Given recent observations of an astrophysical flux of neutrinos by the IceCube neutrino observatory, the design of the next generation Antarctic neutrino observatory is well underway. The IceCube Gen2 high-energy array will instrument a $\sim10\,\mathrm{km}^3$ volume of clear glacial ice at the South Pole to deliver substantial increases in the observed astrophysical neutrino sample for all...
Mr
David Michael Green
(UMD/NASA)
31/07/2015, 15:00
The Pass 8 gamma-ray simulation and reconstruction package for the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope
has dramatically enhanced the ability of the LAT to perform gamma-ray science. The Pass 8 improvements have also allowed for the development
of a new cosmic-ray proton analysis. Using the new Pass 8 direction and energy reconstruction, we create a new proton...
Xin Wu
(Universite de Geneve (CH))
31/07/2015, 15:00
DAMPE (DArk Matter Particle Explore) is a satellite mission of the Chinese Academy of Science dedicated to high energy particle detections in space. The main scientific objective of DAMPE is to detect electrons and photons in the range of 5 GeV-10 TeV with unprecedented energy resolution in order to identify possible Dark Matter signatures. It will also measure the flux of nuclei up to 100 TeV...
Prof.
George Wei-Shu Hou
(National Taiwan University)
31/07/2015, 15:12
By separating $\nu_{\tau}\to\tau$ conversion from $\tau$-shower generation,
the Earth-skimming $\nu_{\tau}$ method allows for huge target mass and
detection volume simultaneously. In part motivated by recent IceCube
astrophysical PeV neutrino events, the planned NTA observatory will
have three site stations watching the air mass surrounded by Mauna Loa,
Mauna Kea, and Hualalai on...
Pierre Colin
(MPI fuer Physik)
31/07/2015, 15:15
Galaxy clusters are the largest and most massive gravitationally bound structures known in the Universe. Cosmic-ray hadrons (CR) accelerated at structure formation shocks and injected by galaxies, are confined in galaxy clusters where they accumulate for cosmological times. The presence of diffuse synchrotron radio emission in several clusters proves the existence of high-energy electrons, and...
Bayarto Lubsandorzhiev
(Institute for Nuclear Research of RAS)
31/07/2015, 15:15
We present results of extensive studies of CaMoO4 crystals for dark matter experiments. Light emission kinetics and absolute light yield of the crystals were measured thoroughly at room temperature. The temperature dependence of the crystals parameters were measured in the wide range of 1-300K. It is shown that CaMoO4 crystals are very interesting for dark matter experiments and for...
Sergey Koldobskiy
(NRNU MEPhI)
31/07/2015, 15:15
The results of measurements of trapped and albedo cosmic ray deuteron fluxes obtained in the PAMELA experiment are presented in this work. The PAMELA is an international experiment aimed to measurements of cosmic ray particle fluxes in wide energy range. In particular, Analysis of PAMELA data gives possibility to identify deuterons and then to reconstruct deuteron spectra of different origin...
Stijn Buitink
(Vrije Universiteit Brussel (VUB))
31/07/2015, 15:15
The LOFAR radio telescope measures the radio emission from air showers with unprecedented precision. In the dense core individual air showers are detected by hundreds of dipole antennas. The complicated radio pattern on the ground is accurately reproduced by modern radio simulation codes and contains information about the longitudinal shower development. With a hybrid reconstruction technique,...
Mirko Boezio
(Universita e INFN, Trieste (IT))
31/07/2015, 16:30
The nine years of data taking in space of the experiment PAMELA are
providing interesting information concerning the origin and
propagation of both galactic and solar cosmic rays.
The measured antiparticle component of the cosmic radiation shows
features that can be interpreted in terms of dark matter annihilation or
pulsar contribution. The precise measurements of the energy spectra...
Steven Barwick
(University of California)
31/07/2015, 17:00
Evidence is growing for the existence of a diffuse flux of astrophysical neutrinos with energies up to a few x 10^15 eV. This has spurred considerable interest in developing new techniques that can extend the search to even higher neutrino energies. Promising new efforts over the past half-decade focus on the radio-Cherenkov technique in polar regions with cold, highly transparent ice. I...
Dr
Marco Ajello
(Clemson University)
31/07/2015, 17:30
The Fermi Large Area Telescope (LAT) has been routinely gathering science data since August 2008, surveying the full sky every three hours. The first Fermi-LAT catalog of sources detected above 10 GeV (1FHL) relied on three years of data to characterize the $>$10 GeV sky. The improved acceptance and point-spread function of the new Pass 8 event reconstruction and classification together with...
Michel Spiro
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
31/07/2015, 18:30
Tim M.P. Tait
(University of California, Irvine)
01/08/2015, 09:00
The identity of the dark matter is perhaps the most pressing question confronting particle physics, and is likely to transform our understanding of fundamental particles. A wide array of theoretical ideas exist, though there is currently little experimental guidance as to which are correct. I will review the current status of the leading candidates to play the role of the dark matter,...
Claudio Kopper
(University of Alberta)
01/08/2015, 09:45
With the recent discovery of high-energy neutrinos of extra-terrestrial origin by the IceCube neutrino observatory, neutrino-astronomy is entering a new era. The highest energy neutrinos observed to date exceed 1 PeV in energy, a regime of particular interest because the neutrinos should point back to the still elusive accelerators of the highest energy Galactic and extragalactic cosmic rays....
Julian Sitarek
(University of Łódź)
01/08/2015, 11:00
S3 0218+35 is a blazar located at a cosmological redshift of z=0.944.
It is gravitationally lensed by a spiral galaxy at a redshift of z=0.68.
The blazar and its lens are well studied in the radio through X-ray bands,
and several blazar outbursts were detected by Fermi-LAT at energies above
100 MeV.
Strong gravitational lensing was invoked to explain the two components
apparent in the...
Dr
Ivan Petukhov
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)
01/08/2015, 11:00
Acceleration of solar energetic particles by the shock accompanying a coronal mass ejection is considered. Influence of the region behind the shock front on particle acceleration process is investigated. The external boundary of coronal mass ejection and the shock front are specified as the segments of spherical surfaces with the different radii moving in coordination. Nonstationarity of...
Wolfgang Menn
(University of Siegen)
01/08/2015, 11:00
On the 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since that time. The apparatus comprises a time-of-flight system, a magnetic spectrometer ( permanent magnet) with an silicon-microstrip tracking system, an imaging calorimeter built from layers of silicon -microstrip detectors interleaved with plates of...
Mr
BALAKRISHNAN HARI HARAN
(HECR Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India and GRAPES-3 Experiment, Cosmic Ray Laboratory, Ooty 643 001, India)
01/08/2015, 11:15
The GRAPES-3 experiment measures directional flux 1 GeV muons with very high precision. For a precise simulation of the measured flux of 1GeV muons in GRAPES-3, the energy spectrum of primary cosmic rays should be accurately known. We have used the data from several balloon and satellite based experiments to determine the proton and helium spectrum in the energy range from 10GV to 10TV. Since...
Christian Mariaud
(LLR - Ecole Polytechnique)
01/08/2015, 11:15
LS 5039 is a gamma-ray binary system observed in a broad energy range, from radio to TeV energies, which exhibits both flux and spectral modulation folded on its orbital period of $\sim 3.9$~d. The X-ray and very-high-energy (VHE, E > 100 GeV) gamma-ray fluxes display a maximum/minimum at inferior/superior conjunction, with spectra becoming respectively harder/softer, a behavior which is...
Veronica Bindi
(University of Hawai'i at Manoa (US))
01/08/2015, 11:15
The Alpha Magnetic Spectrometer (AMS-02) with its acceptance of about 0.45 m^2 sr, is the largest Solar Energetic Particle (SEP) detector in space. It was installed on the International Space Station (ISS) on May 19, 2011, where it will take data for the duration of the station (≈ 2024). In the first 3 years of operations, AMS-02 detected and measured the highest energy SEPs produced during M-...
Dr
Eugenio Bottacini
(Stanford University)
01/08/2015, 11:15
Results from surveys show that most galaxies underwent one or more eras of Active Galactic Nucleus (AGN) activity throughout their existence. During the AGN era the central region of the galaxy becomes very bright up to soft gamma-ray energies due to inverse-Comptonization by relativistic electrons. However, survey studies can not draw definite conclusions on what switches on the AGN activity...
Prof.
Jing Huang
(Institute of High Energy Physics, CAS),
for the Tibet ASgamma Collaboration for the Tibet ASgamma Collaboration
(Institute of High Energy Physics, CAS)
01/08/2015, 11:30
We have started a new hybrid air shower experiment in Yangbajing (4300m a.s.l.) in Tibet since February 2014. This new hybrid experiment consists of the YAC-II comprising of 124 core-detectors placed on a grid of about 500 m2, the Tibet-III AS array with the total area of about 50000 m2 and the underground MD array comprising of 5 clusters with 800 m2 each below underground 2.5m. This...
Laurent Yves Marie Derome
(Centre National de la Recherche Scientifique (FR))
01/08/2015, 11:30
Lithium nuclei in cosmic rays are produced by the spallation of heavier cosmic rays on the interstellar medium. Thus, the abundance of Lithium constitutes a very sensitive observable for the modeling of cosmic rays propagation in the Galaxy. A precision measurement of the Lithium flux with rigidities from 2 GV to 3 TV by AMS, based on 1.6 million events, is presented for the first time. The...
Mr
Claudio Corti
(University of Hawai'i at Manoa (US))
01/08/2015, 11:30
Galactic Cosmic Rays (GCRs) entering the heliosphere are disturbed by the magnetic field of the Sun, which varies with a period of 11 years. The solar modulation affects the GCR fluxes up to few tens of GeV, modifying the shape and the intensity of the local interstellar spectrum (LIS). The time variation of the galactic cosmic protons at Earth can be studied indirectly on ground with the...
Matteo Cerruti
(Harvard-Smithsonian Center for Astrophysics)
01/08/2015, 11:30
During May 2013, a gamma-ray flare from the BL Lac object 1ES 1727+502 (z=0.055) has been detected with the VERITAS Cherenkov telescopes. This detection represents the first evidence of very-high-energy (E>100 GeV) variability from this blazar and has been achieved using a reduced-high-voltage configuration which allows observations under bright moonlight. The integral flux is about five times...
Alba Fernandez-Barral
(Institut de Fisica d'Altes Energies (IFAE))
01/08/2015, 11:30
Transient and variable stellar objects provide a proper environment for particle acceleration and radiation of GeV-TeV gamma-rays. MAGIC Collaboration has carried out deep observations of different transient and variable stellar objects. Here we highlight 5 of them: LS I +61 303, MWC 656, SS 433, Cygnus X-1 and SN 2014J. We present the results of those observations, including long-term...
Pol Bordas
(Max-Planc-Institut fur Kernphysik)
01/08/2015, 11:45
SS433 features the most energetic jets known in our Galaxy. A large fraction of the jet kinetic power is delivered to the surrounding W50 nebula at the jet termination shock, from which high-energy emission and cosmic-ray production have been anticipated. Here we report on the possible detection of a persistent gamma-ray signal from a source located within the 99.9 % confidence level contours...
Michal Dyrda
(Institute of Nuclear Physics PAS)
01/08/2015, 11:45
Most of the extragalactic objects detected so far in the very high energy (VHE) regime are blazars, but detected nearby radio galaxies: M87, Cen A and NGC 1275 of type FRI seem to constitute a new class of VHE emitters. The radio galaxy PKS 0625-354 was observed with the H.E.S.S. phase I telescopes in 2012, above the energy threshold of 250 GeV. The time-averaged TeV energy spectrum is well...
Dr
Zhang Shoushan
(Institute of High Energy Physics)
01/08/2015, 11:45
The measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach in finding their origin. Locating the “knees” of the spectra is an important part of the approach and has yet to be achieved. Here we report a measurement of the mixed Hydrogen and Helium spectrum using the combination of the ARGO-YBJ experiment and of a prototype Cherenkov telescope...
Alberto Oliva
(Centro de Investigaciones Energ. Medioambientales y Tecn. - (ES)
01/08/2015, 11:45
A precision measurement by the Alpha Magnetic Spectrometer of the Boron to Carbon fluxes ratio with energies from 0.5 GeV/nucleon to 1 TeV/nucleon based on 10 million events is presented. Precision measurement of the Boron flux, based on 2 million events, together with the variation of the flux spectral index with rigidity is also presented.
Dr
Timo Laitinen
(Jeremiah Horrocks Institute, University of Central Lancashire, Preston, UK)
01/08/2015, 11:45
Multi-spacecraft observations of Solar Energetic Particles (SEPs) show that SEPs related to a single solar eruption can be observed over a wide range of heliolongitudes. The SEP anisotropy observations suggest that interplanetary transport significantly contributes to this spreading of SEPs across the mean Parker Spiral field. However, the current transport models that describe the cross-field...
Dr
Olaf Reimer
(Innsbruck University)
01/08/2015, 12:00
Eta Carinae, the so-far only colliding wind binary detected at high-energy gamma-rays, has been observed over its first complete orbit since launch of the Fermi Gamma-ray Space Telescope. Different emission scenarios are proposed to explain the temporal and spectro-temporal features, by either postulating strong dominance of hadronic particle populations, a single emitting particle population...
Ivan De Mitri
(Univ. of Salento and INFN, Lecce, Italy)
01/08/2015, 12:00
The CR spectrum has been studied by the ARGO-YBJ experiment in a wide energy range (TeVs→ PeVs) . This study is particularly interesting because not only it allows a better understanding of the so called ’knee’ of the energy spectrum and of its origin, but also provides a powerful cross-check among very different experimental techniques.
The unique detector features (full coverage, time...
Karl-Ludwig Klein
(Observatoire de Paris)
01/08/2015, 12:00
The highest energies of solar energetic nucleons detected in space or through gamma-ray emission in the solar atmosphere are in the GeV range. Where and how these particles are accelerated is still controversial. The candidate processes are related to magnetic reconnection in a flare or a coronal mass ejection (CME), and to the shock wave driven by a fast CME. We search for observational...
Melanie Heil
(Massachusetts Inst. of Technology (US))
01/08/2015, 12:00
A precision measurement of the flux ratio of Carbon to Helium in primary cosmic rays with rigidities from 2 GV to 2 TV is presented. Precision measurement of the Carbon flux, based on 8 million events, together with the variation of the flux spectral index with rigidity is also presented.
Mr
Thomas Armstrong
(Department of Physics, University of Durham, South Road, Du rham, DH1 3LE, UK)
01/08/2015, 12:00
The 6-year *Fermi* data set contains some 8000 extragalactic events with E > 100GeV. To search fo the sources of these events, we applied a clustering algorithm (DBSCAN), using a search radius based on the *Fermi*-LAT point spread function, to events from > 10 degrees above and below the Galactic plane. This analysis revealed 49 significant clusters. Of these, 21 correspond to known Very High...
Floriana Zefi
(LLR - Ecole Polytechnique)
01/08/2015, 12:15
We report on evidence of correlated gamma-ray variability from the BL Lac source B2 1215+30, detected by VERITAS (E > 100 GeV) and the Fermi Large Area Telescope (100 MeV < E <100 GeV). The source was observed by VERITAS during an exceptional flaring state in February 2014. Further investigations of flux variability in the energy range covered by Fermi-LAT, quasi-simultaneous with VERITAS...
Paolo Montini
(INFN Roma Tor Vergata)
01/08/2015, 12:15
The measurement of the cosmic ray (CR) spectrum plays a fundamental role in the understanding of the production and acceleration mechanisms of high energy CR. Moreover the determination of the CR composition at energies > 100 TeV could provide a better understanding of the origin of the knee in the all-particle CR spectrum.
The ARGO-YBJ experiment is a full coverage air shower detector...
Dr
Yutaka Matsubara
(Solar-Terrestrial Environment Laboratory, Nagoya University)
01/08/2015, 12:15
During the second period of maximum solar activity (October 2013 through October 2014) of the current solar cycle we have searched for solar neutron events.
When a solar flare occurs, ions are sometimes accelerated. Those ions interact with the solar atmosphere and produce solar neutrons. We examined recent data from five stations of the International Network of Solar Neutron Telescopes...
Victor Zabalza
(University of Leicester)
01/08/2015, 12:15
Eta Carina is the only colliding-wind binary for which
non-thermal emission is detected from hard X-rays to high-energy gamma
rays. Although the physical conditions in the shock region change on
timescales of hours to days, the variability seen at GeV energies is
quite weak and on significantly longer timescales. The gamma-ray
spectrum exhibits two spectral features that can be...
Alan Cummings
(California Institute of Technology)
01/08/2015, 12:15
Voyager 1 (V1) has been in the local interstellar medium (LISM) since August, 2012. We present the galactic cosmic-ray (GCR) energy spectra of most elements from H through Ni, and also of electrons, for a period exceeding two years. The V1 energy spectra define the newly-revealed, low-energy part of the interstellar spectra of nuclei down to $\sim$1 MeV/nuc and of electrons down to $\sim$8...
Hamish Silverwood
(University of Amsterdam)
01/08/2015, 14:00
Determination of the Dark Matter density at the solar position is critical to direct dark matter searches. Additionally, it is important to make this determination with as few assumptions as possible, as results from direct detection searches are used to explore a wide variety of theoretical models, and hidden astrophysical assumptions could bias theoretical searches. Here we present a Jeans...
Jan Auffenberg
(RWTH Aachen University)
01/08/2015, 14:00
IceCube is the world’s largest high-energy neutrino observatory, built at the geographic South Pole. For neutrino astronomy, a large background-free sample of well-reconstructed astrophysical neutrinos is essential. The main backgrounds for this signal are muons and neutrinos, which are produced in cosmic-ray air showers in the Earth’s atmosphere. The coincident detection of these air showers...
Prof.
Martin Israel
(Washington University in St Louis)
01/08/2015, 14:00
The Cosmic Ray Isotope Spectrometer (CRIS) on the ACE spacecraft has been measuring the isotopic composition of Galactic Cosmic Rays (GCRs) since October 1997. Using selected data from the past seventeen years, we have a set of 3.55 x 10^5 Fe nuclei in the energy interval ~240 to ~470 MeV/nucleon with excellent mass resolution characterized by sigma = 0.24 amu. In this data set we have...
David Staszak
(McGill University)
01/08/2015, 14:00
VERITAS is a ground-based array of four 12-meter telescopes near Tucson, Arizona and is one of the world's most sensitive detectors of very high energy (VHE: >100 GeV) gamma rays. VERITAS has a wide scientific reach that includes the study of extragalactic and Galactic objects as well as the search for astrophysical signatures of dark matter and the measurement of cosmic rays. In this...
Dr
Konstantin Belov
(JPL, Caltech)
01/08/2015, 14:00
Radio detection is a technique of great interest for detecting ultra-high energy cosmic rays. Models of radio emission from extensive air showers, based solely on principles of classical electrodynamics, were developed in recent years. The SLAC T-510 experiment was conducted in January-February of 2014 using an electron beam to validate these models in a laboratory environment. Secondary...
Vincent Bonnivard
(Centre National de la Recherche Scientifique (FR))
01/08/2015, 14:15
Self-annihilation or decay of dark matter (DM) particles could produce high-energy gamma-rays. Owing to their proximity, high DM content, and lack of astrophysical background, dwarf spheroidal galaxies (dSphs) of the Milky Way are among the best targets for current and future gamma-ray instruments. Putting constraints on the DM particle properties requires a precise knowledge of their...
Dr
Frank G. Schröder
(Karlsruhe Institute of Technology (KIT))
01/08/2015, 14:15
LOPES was a digital, phased antenna array located at the site of KASCADE-Grande in Karlsruhe, Germany. Triggered by the particle-detector array of KASCADE, LOPES measured the radio signal of air showers. By an interferometric, offline combination of the signals measured by different antennas, LOPES was able to enhance the signal-to-noise ratio. This lowered the detection threshold...
Dr
M. Sasaki
(NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA)
01/08/2015, 14:15
Dr
Wystan Benbow
(Smithsonian Astrophysical Observatory)
01/08/2015, 14:20
The VERITAS array of four 12-m imaging atmospheric-Cherenkov telescopes began full-scale operations in 2007, and is one of the world’s most sensitive detectors of astrophysical VHE (E>100 GeV) gamma rays. Observations of active galactic nuclei (AGN) are a major focus of the VERITAS Collaboration, and more than 50 active galactic nuclei (AGN), primarily blazars, are known to emit VHE...
Mr
Ryan Murphy
(Washington University in St. Louis, St. Louis, MO 63130, USA)
01/08/2015, 14:30
The SuperTIGER (Trans-Iron Galactic Element Recorder) experiment was launched on a long-duration balloon flight from Williams Field, Antarctica, on December 8, 2012. SuperTIGER flew for a total of 55 days at a mean atmospheric depth of 4.4 g/cm^2. The instrument measured the abundances of galactic cosmic rays in the charge (Z) range Z ≥ 10 with excellent charge resolution, displaying well...
Mattia Di Mauro
(University of Turin and INFN Turin)
01/08/2015, 14:30
Electron and positron cosmic rays are one of the most powerful tool for astroparticle physics.
The AMS-02 Collaboration has recently released the electron, positron inclusive and positron fraction spectra measured with an incredible precision.
We performed a combined analysis of the recent AMS-02 data in a self-consistent framework where we theoretically model all the astrophysical...
Keiichi Mase
(Chiba University)
01/08/2015, 14:30
Askaryan Radio Array (ARA) is being built at the South Pole aiming
for observing high energy cosmogenic neutrinos above 10 PeV.
The ARA detector identifies the radio emissions from the excess
charge in a particle shower induced by a neutrino interaction. Such
a radio emission was first predicted by Askaryan in 1962 and
experimentally confirmed by Saltzberg et al. using the SLAC...
Brian Humensky
(Columbia University)
01/08/2015, 14:34
The middle-aged supernova remnant IC 443 is interacting with molecular gas in its surroundings. Fermi-LAT has established that its gamma-ray emission at low energies shows the “pion bump” that is characteristic of hadronic emission. TeV emission was previously established by MAGIC and VERITAS at a site of interaction between the shock front and a molecular cloud. VERITAS has continued to...
Allan Labrador
(California Institute of Technology)
01/08/2015, 14:45
SuperTIGER (Trans-Iron Galactic Element Recorder) is a large-area balloon-borne instrument built to measure the galactic cosmic-ray abundances of elements from Z=10 (Ne) through Z=56 (Ba) at energies from 0.8 to ~10 GeV/nuc. SuperTIGER successfully flew around Antarctica for a record-breaking 55 days, from December 8, 2012 to February 1, 2013. In this paper, we present results of an analysis...
Andrew Romero-Wolf
(Jet Propulsion Laboratory, California Institute of Techology)
01/08/2015, 14:45
In the past decade, searches for the cosmogenic neutrino flux produced by the interactions of ultra-high energy cosmic rays with the cosmic microwave background have not yet resulted in detection. Radio detection of ultra-high energy neutrinos provides a cost-effective means probing large amounts of effective volume. The Antarctic Impulsive Transient Antenna (ANITA) balloon-borne experiment,...
Anna O'Faolain de Bhroithe
(DESY)
01/08/2015, 14:48
The very-high-energy (VHE; E > 100 GeV) gamma-ray observatory, VERITAS, detected exceptionally bright flares from the high mass X-ray binary LS I +61 303 during the period October - December 2014. LS I +61 303 is a known VHE gamma-ray source, the flux from which varies strongly with the orbital period of ~26.5 days. The maximum VHE flux is found around apastron (orbital phase ~0.6) at a level...
Alexander Panov
(MSU, Skobelsyn Institute of Nuclear Physics)
01/08/2015, 15:00
One of the main results of the ATIC experiment is a collection of energy spectra of abundant cosmic ray nuclei – protons, He, C, O, Ne, Mg, Si, Fe measured in terms of the energy per particle in energy range from 50 GeV to tenths of TeV. In this report the ATIC energy spectra of abundant nuclei are back propagated to the spectra in sources in terms of magnetic rigidity using a number of...
Maxim Pshirkov
(Moscow State University)
01/08/2015, 15:00
Dark matter could be captured by stars at any stage of their evolution.
By considering adiabatic contraction of the dark matter (DM) during star formation, we estimate the amount of DM trapped in stars at their birth.
We simulate the adiabatic contraction of a DM distribution during the process of the star formation, paying particular attention to the phase space distribution of the DM...
Clancy James
(University of Erlangen-Nuernberg)
01/08/2015, 15:00
The lunar Askaryan technique is a method to study the highest-energy cosmic rays, and their predicted counterparts, the ultra-high-energy neutrinos. By observing the Moon with a radio telescope, and searching for the characteristic nanosecond-scale Askaryan pulses emitted when a high-energy particle interacts in the outer layers of the Moon, the visible lunar surface can be used as a detection...
Andrew Smith
(UMD College Park / NASA GSFC)
01/08/2015, 15:02
The Galactic Center Ridge is perhaps the most local, busy environment for high energy particle acceleration; home to many relativistic particle accelerators such as pulsar wind nebulae, supernova remnants, and the central supermassive black hole SgrA*. Observations with VHE (>100 GeV) gamma-ray telescopes of the region have revealed multiple point sources associated with well known objects, as...
Mathieu Boudaud
(LAPTh Annecy France)
01/08/2015, 15:15
Daniel García Fernández
(Universidade de Santiago de Compostela)
01/08/2015, 15:15
We present the calculation of coherent radio pulses emitted
by extensive air showers induced by ultra-high energy cosmic
rays accounting for reflection on the Earth's surface.
Our work is motivated by the detection of pulsed events
in the ANITA experiment compatible with cosmic-ray origin
after reflection on the ice cap at the South Pole.
The properties of the radiation are discussed...
Dmitry Podorozhny
(MSU SINP)
01/08/2015, 15:15
The "knee" energy range 1015 - 1016 eV is a crucial region for the understanding of the Cosmic Rays (CR) origin, acceleration and propagation in our Galaxy. The NUCLEON satellite experiment is designed to investigate directly a cosmic ray nuclei energy spectrum and the chemical composition from 100 GeV to 1000 TeV and the atomic charge range up to Z~40 as well as a cosmic ray electron...
Mr
Sajan Kumar
(for the VERITAS collaboration)
01/08/2015, 15:16
Supernova remnants (SNRs) have long been considered the leading candidate sites for the acceleration of cosmic rays within the Galaxy through the process of diffusive shock acceleration. The connection between SNRs and cosmic rays is supported by the detection of high energy (HE; 100 MeV to 100 GeV) and very high energy (VHE; 100 GeV to 100 TeV) gamma rays from young and middle-aged SNRs....
Dr
Maxim Shayduk
(IRFU, Saclay)
01/08/2015, 15:30
One of the constrains for the instruments with large number of readout channels is the cost of a complex data acquisition (DAQ) system. We suggest here the novel approach - the Long Buffer ReadOut System (LiBROS).
The LiBROS comprises the trigger, based on Field-Programmable-Gate-Array (FPGA) and the readout system based on Flash Analog-To-Digital Converters (FADCs). The readout channel...
Dr
Maxim Shayduk
(IRFU, Saclay)
01/08/2015, 15:30
The energy range >100 TeV is of central importance for high-energy astrophysics. PeV accelerators are expected to produce also copious photons of about a decade less in energy. Thus registering gamma-rays with energies above 100 TeV will pinpoint the galactic sources able to accelerate particles up to PeV energies (so-called PeVatrons).
We suggest a concept of a novel wide-angle imaging...
Katherine Rawlins
(University of Alaska Anchorage)
01/08/2015, 15:30
Snow overburden is a part of the IceTop detector at the South Pole, and becoming more significant over time as snowdrift buries the array. Snow attenuates the electromagnetic component of cosmic ray air showers before they reach the detectors, reducing the measured signals $S$, raising the threshold of the array in general, and introducing a potential source of systematic error in measuring...
Stefano Mastroianni
(INFN, sec. Naples),
michele iacovacci
(INFN)
01/08/2015, 15:30
The determination of the primary cosmic ray all-particle spectrum with ground-based air shower experiments usually depends on the assumed elemental composition and hadronic interaction model. Here we show that an energy estimator independent of the primary mass composition can be defined by means of shower parameters measured in the core region , as carried out in the ARGO-YBJ experiment. An...
Alison Mitchell
(Max-Planck-Institut für Kernphysik)
01/08/2015, 15:30
Muons produced in extensive air showers generate ring-like images in Imaging Atmospheric Cherenkov Telescopes when travelling near parallel to the optical axis. From geometrical parameters of these images, the absolute amount of light emitted may be calculated analytically. Comparing the amount of light recorded in these images to expectation is a well established technique for telescope...
Dr
Robert Lauer
(University of New Mexico)
01/08/2015, 15:30
The High Altitude Water Cherenkov (HAWC) Observatory continuously observes an instantaneous field of view of about 2 steradians above the array for gamma-rays between 100 GeV to 100 TeV. The large amount of raw data, the importance of small number statistics, the large dynamic range of gamma-ray signals in time (1 – 10^8 sec) and angular extent (0.1 – 100 degrees), and the growing need to...
Ilya Usoskin
(University of Oulu)
01/08/2015, 15:30
A new cosmic ray detector has been installed in the inner Antarctic Plateau, at Concordia station ($75^\circ$06'S 123$^\circ$23'E, 3233 meters a.s.l.). The detector consists of two fully independent measuring units: FIN1 - a standard mini neutron monitor, and FIN2 - a bare (lead-free) neutron monitor. The detector was built by the North-West University (Potchefstroom, South Africa), are owned...
Mr
Lionel Brayeur
(Vrije Universiteit Brussel), Mr
Martin Casier
(Vrije Universiteit Brussel)
01/08/2015, 15:30
Abstract: The origin of the Ultra-High Energy Cosmic Rays (UHECRs) is still unknown. Gamma-Ray Bursts (GRBs) are generally presented as possible candidates to host progenitors producing such UHECRs. However, the exact physical processes underlying GRBs are yet not fully understood. If GRBs are (partly) responsible for the observed UHECRs, they have to contain a hadronic component, and...
Dr
Laura Rossetto
(Radboud University Nijmegen)
01/08/2015, 15:30
The LOw Frequency ARay (LOFAR) is a multipurpose radio antenna array aimed to detect radio signals in the frequency range 10$-$240 MHz, covering a large surface in Northern Europe with a higher density in Northern Netherlands.
The detection of the radio signal emitted by cosmic ray induced air showers allows to reconstruct the geometry of the observed cascade. Thus, several properties of...
Henrike Fleischhack
(DESY)
01/08/2015, 15:30
The energy-dependent abundance of elements in cosmic rays plays an important role in understanding their acceleration and propagation. Most current results are obtained either from direct measurements by balloon- or satellite-borne detectors, or from indirect measurements by air shower detector arrays on the Earth's surface. Imaging Air Cherenkov Telescopes (IACTs), used primarily for...
Ruth Hoffmann
(Bergische Uni Wuppertal)
01/08/2015, 15:30
Ultra high energy neutrinos may be observed in ice by the emission of acoustic signals. The SPATS detector has successfully shown that GZK-neutrinos can be observed in the clear ice at the South Pole at the IceCube detector site. To explore other potential detection sites glacial ice in the Alps and in Antarctica has been surveyed for its acoustical properties. The purpose of the Enceladus...
444.
Aerosol in spring-summer-autumn-winter cycles by observation at Yakutsk EAS array in 2004-2013.
Igor Petrov
(Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy)
01/08/2015, 15:30
Long-term set of data of aerosol composition and transparency of the atmosphere in the region of Yakutsk analyzed. Season variation of the characteristics are found in the annual cycle. Season variation taken into account in air shower analysis.
Prof.
Vasily Prosin
(Moscow State University, Skobeltsyn Institute of Nuclear Physics)
01/08/2015, 15:30
The first stage of the Tunka-HiSCORE prototype array operated in the Tunka Valley in March and April of 2014. It consisted of 9 optical stations with the total area of 0.3x0.3 km^2. Reconstruction methods of extensive air shower parameters are based on the experience of the Tunka-133 data processing. Primary energy spectrum in the energy range of 200 TeV – 30 PeV is obtained as the first...
Dr
Gordana Tešić
(Penn State)
01/08/2015, 15:30
The Astrophysical Multimessenger Observatory Network (AMON) will link the world's leading high-energy neutrino, cosmic-ray, gamma-ray and gravitational wave observatories by performing real-time coincidence searches for multimessenger sources from observatory subthreshold data streams. The resulting coincidences will be distributed to interested parties in the form of electronic alerts for...
Davide Badoni
(INFN Sezione di Roma Tor Vergata)
01/08/2015, 15:30
An Electric Field Detector (EFD) for space applications has been designed and built in the framework of the CSES (China Seismo-Electromagnetic Satellite) mission. The instrument has been conceived for space-borne measurements of electromagnetic phenomena such as seimo-electromagnetic perturbations and more in general to investigate lithosphere-atmosphere-ionosphere EM coupling. The EFD ...
Segev BenZvi
(University of Rochester)
01/08/2015, 15:30
The recent observation of PeV neutrinos at the IceCube Neutrino Observatory has revived interest in deploying large-exposure optical air shower detectors at the South Pole. The main challenge for such detectors, which were last deployed at the Pole in the 1990s, is the poor atmospheric conditions prevalent during austral winter. To investigate the clarity of the atmosphere we have studied...
M. Wiedenbeck
(JPL/Caltech)
01/08/2015, 15:30
The Cosmic Ray Isotope Spectrometer (CRIS) on NASA's Advanced Composition Explorer (ACE) spacecraft has been making precise measurements of cosmic-ray elemental and isotopic composition and energy spectra for nearly 18 years. This instrument uses the dE/dx versus total energy technique to identify nuclei that stop in thick stacks of silicon solid-state detectors and to measure their energy....
Dr
Susumu Inoue
(Institute for Cosmic Ray Research, University of Tokyo)
01/08/2015, 15:30
The Cherenkov Telescope Array (CTA), the new generation very high-energy gamma-ray observatory, will improve on the flux sensitivity of the current Cherenkov telescopes by an order of magnitude over a continuous range from about 10 GeV to above 100 TeV. With tens of telescopes distributed in the North and South hemispheres, the large effective area and field of view coupled with the fast...
Dr
Valery Sdobnov
(Institute of Solar-Terrestrial physics of the Siberian Branch of the Russian Academy of Sciences)
01/08/2015, 15:30
We investigated the variations in the cosmic ray (CR) rigidity spectrum and anisotropy during the 2014 January 6 Ground Level Enhancement (GLE) from the ground-based observations of CRs at the global network of stations and with spacecraft by using the method of spectrographic global survey.
Presented are the CR rigidity and variation spectra, as well as the relative variations in the 4-GV...
Mr
Tim Holch
(Humboldt University Berlin)
01/08/2015, 15:30
Data acquisition (DAQ) and control systems for arrays of Cherenkov telescopes comprise
hundreds of distributed software processes that implement the readout, control and monitoring
of various hardware devices. A multitude of different error conditions (malfunctioning
detector hardware, crashing software, failures of network and computing equipment etc.) can
occur and must be dealt with...
Dr
Zbigniew Kobylinski
(Polish Air Force Academy)
01/08/2015, 15:30
Many time series of neutron component data are collected in World Data Centers from the fifties of XX century to nowadays. It is very important to believe that those data are typified as stabilized and generally of good quality.
In the paper the correctness of the pressure corrected data of individual neutron monitor (NM) stations is examined on the monthly to yearly time scale separately...
Ms
Susanne Raab
(ECAP, Universität Erlangen-Nürnberg)
01/08/2015, 15:30
Skymaps measured with Imaging Atmospheric Cherenkov Telescopes (IACT) represent the real source distribution convolved with the point spread function of the observing instrument. Current IACTs have an angular resolution in the order of 0.1 degree which is rather large for the study of morphological structures and for comparing the morphology in $\gamma$-rays to measurements in other...
Prof.
Roger Clay
(University of Adelaide)
01/08/2015, 15:30
The HEAMS muon detector is a sea-level spaced telescope consisting of four one square metre scintillators vertically above a second set of four. Coincidences taken with an FPGA data acquisition system can produce a number of directional beams with various useful energies in the range 50 GeV to 1 TeV.
HEAMS is located at 35 degrees south and accesses an understudied declination/latitude...
Ivan De Mitri
(Univ. of Salento and INFN, Lecce, Italy)
01/08/2015, 15:30
In a latest paper the ARGO-YBJ experiment proved the effect of the geomagnetic field (GeoMF) on the development of extensive air showers (EAS) and the dependence of the trigger rate ($\lambda$) on the coupling angle ($\xi$) between GeoMF and EAS axis, according to the formula $\lambda$ = $\lambda_0 (1-\eta \ sin^2 \xi)$. The value $\lambda_0$ depends on the EAS zenith angle, while the...
Michael Schimp
(Rheinisch-Westfaelische Tech. Hoch. (DE))
01/08/2015, 15:30
IceCube, a cubic-kilometer sized neutrino detector at the geographical South Pole, has recently discovered a diffuse all-flavor flux of astrophysical neutrinos. However, the corresponding astrophysical sources have not been identified yet. We focus on the results of the angular correlation analysis (arXiv:1408.0634). This analysis is sensitive to clusters of muon neutrino arrival directions as...
G. Chiritoi
(Institute of Space Science (Ro) for the JEM-EUSO Collaboration)
01/08/2015, 15:30
One of the major issues in the detection of the UV yield of orbital UV telescopes is the optical calibration of the focal surface detector, which in turn requires advanced knowledge of the atmosphere in the FoV of the telescope. As such, we report here on the evaluation of the GLS as a ground-based optical system for the in-orbit calibration of orbital instruments such as the Mini-EUSO,...
Takao Kuwabara
(Chiba University)
01/08/2015, 15:30
Due to the large amount of flux, atmospheric neutrino is the main background for the IceCube neutrino telescope. Precise measurement of its spectrum allows us to reduce uncertainty of any kind of signal analysis. In this paper, we measure atmospheric muon and electron neutrino spectrum from first year of IceCube-86 detector. Track type events originate from muon neutrino and cascade type...
Lev Pustilnik
(Israel Cosmic Ray Center, and Tel Aviv University)
01/08/2015, 15:30
Estimation of barometric coefficient for neutron component of cosmic rays was performed for Antarctic station Mirny and Mt. Hermon in Israel taking into account effect of dynamic pressure caused by wind in the atmosphere. Hourly data of continue monitoring of neutron component and data of the local meteo station have been used for the period 2007-2014. Wind velocity at the observatory Mirny...
Igor Moskalenko
(Stanford University)
01/08/2015, 15:30
The fully Bayesian approach to the problem of deriving constraints for cosmic ray (CR) model parameters has several advantages. These are: (i) an efficient global scan of the whole parameter space allowing us to explore and take into account parameter correlations and degeneracies, (ii) a best-fit point and statistically well-defined errors on the parameters, (iii) the ability to include and...
Michael Daniel
(University of Durham)
01/08/2015, 15:30
The construction of the Cherenkov Telescope Array (CTA), consisting of two observatories designed to observe the very high energy gamma-ray sky with unprecedented sensitivity and precision, will soon start. We will present the baseline methods and their extensions currently foreseen to achieve the strong requirements on allowed systematic uncertainties for the reconstructed gamma-ray energy...
Elisa Prandini
(University of Geneva)
01/08/2015, 15:30
The SST-1M telescope is one of the prototypes under construction proposed to be part of the future Cherenkov Telescope Array. It uses a standard Davis-Cotton design for the optics and telescope structure, with a dish diameter of 4 meters and a large field-of-view of 9 deg.
The innovative camera design is composed of a photo-detection plane with 1296 pixels including entrance window, light...
Dr
Antonio Bonardi
(Radboud University Nijmegen)
01/08/2015, 15:30
The Cherenkov Telescope Array (CTA) is an international initiative to build the next generation ground based very-high energy gamma-ray observatory. It will consist of telescopes of three different sizes with several different technologies for the cameras that detect the Cherenkov light from the observed air showers. In order to ensure the compliance of each camera technology with CTA...
RAJESH KUMAR MISHRA
(TROPICAL FOREST RESEARCH INSTITUTE)
01/08/2015, 15:30
Characteristic features of NM counts in relation to CMEs and Magnetic fields
Rajesh K. Mishra 1 and Rekha Agarwal 2
1 Computer and Information Technology Section, Tropical Forest Research Institute,
P.O.: RFRC, Mandla Road, Jabalpur (M.P.) India 482 021
2 Department of Physics, Govt. Model Science College (Autonomous),
Jabalpur (M.P.) 482 001, India
E-mail: rkm_30@yahoo.com,...
Teresa Montaruli
(Universite de Geneve (CH))
01/08/2015, 15:30
The prototype camera of the single-mirror Small Size Telescopes (SST-1M) proposed for the Cherenkov Telescope Array (CTA) project was developed using large silicon photomultipliers (SiPM) coupled to hollow light concentrators.
The camera is composed of a silicon photo-sensor plane designed at the University of Geneva, and a readout and trigger system (DigiCam) developed in Krakow. The full...
Dr
Paolo Desiati
(Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin - Madison)
01/08/2015, 15:30
The IceCube Neutrino Observatory at the South Pole functions as a detector for high-energy atmospheric muons and neutrinos produced by cosmic ray interactions in the atmosphere. At the lowest energies, pion and kaon decays contribute the most to leptonic fluxes. Above a couple of hundred TeV, the prompt decay of charmed mesons becomes more important. The production processes of these prompt...
Giovanni Lamanna
(Centre National de la Recherche Scientifique (FR))
01/08/2015, 15:30
Very High Energy gamma-ray astronomy with the Cherenkov Telescope Array (CTA) is evolving towards the model of a public observatory. Handling, processing and archiving the large amount of data generated by the CTA instruments and delivering scientific products are some of the challenges in designing the CTA Data Management. The participation of scientists from within CTA Consortium and from...
Mr
Victor Kindin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
01/08/2015, 15:30
Cherenkov water detector (CWD) with the volume of 2000 m3 (a pool with the dimensions of 26 m x 9 m x 9 m) is the basis of the NEVOD experimental complex which is designed for studying of various cosmic ray components, including muons generated by the neutrinos from the lower hemisphere. Inside the pool the detecting system in form of a spatial lattice of quasi-spherical modules (QSMs) is...
Dr
Natalia Barbashina
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
01/08/2015, 15:30
Study of temporal variations of the flux of cosmic rays on the Earth's surface provides important information about the processes in the heliosphere that cause these variations. These processes have the strong influence on the low-energy cosmic particles, so these studies are mainly carried out in a flux of neutrons detected by ground-based neutron monitors (NM). Studies of variations of...
Dr
Giovanni Lamanna
(Centre National de la Recherche Scientifique (FR))
01/08/2015, 15:30
Rosette and Orion nebulae are two young massive star clusters in which no supernova explosion has occurred yet. That makes two very good candidates to study particle acceleration in a super bubble induces by the collective effects of stellar winds. Using data from Fermi-LAT and a phenomenological model, upper limits on the fraction of mechanical energy converted into accelerated particles have...
Mr
Andriy Petrashyk
(Columbia University)
01/08/2015, 15:30
We present the final optical system design of the prototype Schwarzschild-Couder telescope (pSCT), for which construction is scheduled to begin in early fall at the Fred Lawrence Whipple Observatory in southern Arizona, USA. The Schwarzschild-Couder telescope is a candidate for a future extension of the Cherenkov Telescope Array. This novel aplanatic optical system design is made of two...
Mr
arvind dubey
(rani durgawati university jabalpur india)
01/08/2015, 15:30
The Characteristics of the daily variation of cosmic ray intensity on different types of Anomalous days has been studied by using data of Neutron Monitors. It is observed that Cosmic ray intensity remains statistically low during the period of 1996-1998 on both Beijing and Moscow Neutron monitor station.These data is subjected to Harmonic Analysis Fourier techniques for an tire period of...
Atsushi Iyono
(Okayama University of Science)
01/08/2015, 15:30
In Large Area Air Shower experiments, one of EAS arrays is deployed on the second floor of four stories building in the campus of Okayama University of Science to limit the zenith angle acceptance of muon detection. This system provide EAS muon intensities from zenith solid angles. To compare these intensities with solar activities such as flares, CME and magnetic-storms, LAAS data have been...
Dr
Vladimir Makhmutov
(Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia)
01/08/2015, 15:30
We summarize the results of analysis of cosmic ray (CR) measurements in the Earth’s atmosphere at several latitudes on October 20 and 24, 2014. The cosmic ray fluxes in the atmosphere were recorded during balloon flight in Zaragoza (Spain; 41°39′N, 0°54′W) by two detectors constructed at the Reading University, UK and at the Lebedev Physical Institute, Russia. We compare these data with...
Tijana Prodanovic
(University of Novi Sad)
01/08/2015, 15:30
It is known that close galactic fly-bys and interactions give rise to shock waves that disrupt the interstellar medium of galaxies and impact their morphologies. These large-scale shocks that form in the interstellar medium of interacting systems will be the sites of particle acceleration giving rise to a population of tidal cosmic rays, in addition to standard galactic cosmic rays present in...
Mr
Saša Banjac
(CAU Kiel)
01/08/2015, 15:30
MuSTAnG - the Muon Spaceweather Telescope for Anisotropies at Greifswald - detects muons using 32 scintillator detectors with an area of 0.25m^2 each. These are organized into two 4x4 stacks. MuSTAnG was designed to investigate anisotropy changes of galactic cosmic ray intensities caused by the interplanetary counterpart of Coronal Mass Ejections. In August 2014 MuSTAnG has been transported...
Konstancja Satalecka
(Universidad Complutense de Madrid, Spain)
01/08/2015, 15:30
The planned Cherenkov Telescope Array (CTA), a future ground-based Very-High-Energy (VHE) gamma-ray observatory, will be the largest Cherenkov project of its kind. It aims to provide an order of magnitude increase in sensitivity compared to currently operating VHE experiments and open access to guest observers. These features, together with the thirty years lifetime planned for the...
David Fidalgo
(UCM, Madrid, Spain)
01/08/2015, 15:30
MAGIC is a system of two imaging atmospheric Cherenkov telescopes located on the Canary Island of La Palma. The fast processing of the data at the observation site plays an essential part in the operation of the telescopes and has continuously improved since the beginning of the experiment.
The on-site computing can be divided into three major contributions: the MAGIC online analysis (MOLA),...
Ilya Usoskin
(University of Oulu)
01/08/2015, 15:30
Solar proton events (SPE) occur as a result of massive acceleration of charged particles in the solar corona and/or interplanetary space. Usually such events provide quite a soft spectrum of energetic particles, but sometimes the spectrum can appear hard with energy of solar protons being sufficient to be detected on ground. Such exceptional events are called GLE (ground-level enhancements)...
Johannes Schumacher
(RWTH Aachen University)
01/08/2015, 15:30
Silicon photomultipliers (SiPMs) have replaced traditional photomultiplier tubes bit by bit in high-energy physics experiments in the last years. This includes the scientific fields where the demand for highly efficient and stable photo sensors outweigh the need for large active areas. Silicon photomultipliers offer high photon detection efficiencies, low supply voltages and stable operation...
Igor Petrov
(Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy)
01/08/2015, 15:30
Radio emission at Yakutsk Array registers at frequency 32 MHz and radio antennas co-located with scintillation and Cherenkov detectors of Yakutsk Array. The co-location with particle detectors brings as a profit the reconstruction of fundamental air shower parameters, such as shower axis, energy and arrival direction (azimuthal and zenith angles).
The paper presents data obtained in the new...
Dr
Jason Link
(NASA GSFC/CRESST(USRA))
01/08/2015, 15:30
Cosmic Ray Energetics And Mass for the International Space Station (ISS-CREAM) is a new instrument developed to measure the composition and spectrum of cosmic-ray particles up to close to the knee of the cosmic-ray energy spectrum 10^12 – 10^15 eV. The instrument utilizes two modified detectors from the highly successful CREAM balloon instrument, a sampling calorimeter and silicon charge...
Dr
Fulvio De Persio
(INFN Roma 1)
01/08/2015, 15:30
Mr
Di Yang
(University of Science and Technology of China)
01/08/2015, 15:30
A prototype energy spectrometer is being developed for space missions aiming at observing solar wind plasma activity. This detector mainly consists of three sections: entrance section, particle detection section and readout electronics. The entrance section is implemented by a symmetrical quadrispherical Electrostatic analyzer (ESA) with top hat, which selects incident particles with their...
Dr
Jan Auffenberg
(RWTH Aachen University), Mr
Johannes Schumacher
(RWTH Aachen University)
01/08/2015, 15:30
Air-Cherenkov Telescopes with SIPM based cameras have the potential to detect cosmic rays with a high duty cycle and efficiency in harsh environments.
For IceCube, the world's largest high-energy neutrino observatory presents unique opportunities to detect cosmic-ray air showers in coincidence with the deep-ice detector and an extended air-Cherenkov telescope array.
For neutrino astronomy,...
Dr
Jik Lee
(Sungkyunkwan Univeristy)
01/08/2015, 15:30
The ISS-CREAM experiment is a space-borne mission designed for the precision measurement of energy and elemental composition of cosmic rays. It will be launched to the International Space Station. The Silicon Charge Detector (SCD) is an instrument equipped with four layers of high-precision silicon pad sensors and readout electronics arranged in such a manner that it is free of dead area....
Prof.
Justin Vandenbroucke
(University of Wisconsin)
01/08/2015, 15:30
In 2014 the number of active cell phones worldwide for the first time surpassed the number of humans. Cell phone camera quality and onboard processing power (both CPU and GPU) continue to improve rapidly. In addition to their primary purpose of detecting photons, camera image sensors on cell phones and other ubiquitous devices such as tablets, laptops and digital cameras can detect ionizing...
Dr
Dariusz Gora
(Humboldt University)
01/08/2015, 15:30
This paper investigates the potential to detect tau neutrinos in the energy range of 1-1000 PeV searching for very inclined showers with imaging Cherenkov telescopes. A neutrino induced tau lepton escaping from the Earth may decay and initiate an air shower which can be detected by a fluorescence or Cherenkov telescope. We present here a study of the detection potential of Earth-skimming...
Michael DuVernois
(University of Wisconsin)
01/08/2015, 15:30
The High-Altitude Water Cherenkov (HAWC) observatory in central Mexico is currently the world's only synoptic survey instrument for gamma rays above 1 TeV. Because there is significant interest in covering the full TeV sky with a survey instrument, we have examined options for a Southern Hemisphere extension to HAWC. In addition to providing all-sky coverage of TeV sources, a southern site...
Yusaku Katayose
(Yokohama National University (JP))
01/08/2015, 15:30
To measure the cosmic-ray composition at the knee energy region, Yangbajing Air shower Core (YAC) -III
experiment is planned in Tibet, China.
We developed a front-end electronics to read out charge signal from YAC detectors.
The readout system consists of a charge-to-time converter circuit and a time-to-digital converter circuit.
The system has a linearity from less than 1 pC to more...
Marcos Alfonso Anzorena Méndez
(Instituto de Geofísica, Universidad Nacional Autónoma de México)
01/08/2015, 15:30
The SciCRT (SciBar Cosmic Ray Telescope) is a new cosmic-ray experiment, an improved solar neutron telescope and muon detector, composed of 14 848 scintillator bars arranged to track and record energy of incident particles. The detector was installed at the top of Sierra Negra volcano in Mexico (4600 m above sea level) and 5/8 of the full SciCRT has been in operation since March 2014. To...
Dr
Sergey Sharakin
(SINP MSU)
01/08/2015, 15:30
KLYPVE is an orbital detector of ultra high energy cosmic rays to be deployed on the Russian Segment of the International Space Station. An important part of the detector, which determines its physical parameters (energy threshold, field of view) is an optical system. For the project, a two-component system composed from a large area mirror-concentrator and a correcting Fresnel lens was...
Gwenael Giacinti
(University of Oxford, Clarendon Laboratory)
01/08/2015, 15:30
We have shown that the cosmic ray (CR) knee can be entirely explained by energy-dependent CR leakage from the Milky Way, with an excellent fit to all existing data ("escape model"), see Contribution 122, CR-TH, from D. SEMIKOZ.
In the present work, we have applied our escape model to other normal galaxies. We have also calculated the CR flux expected to leak from starburst galaxies. From...
Mr
Mohammad Hussein
(University of Manitoba)
01/08/2015, 15:30
A fundamental problem in Space Science and
Astrophysics is the interaction between energetic
particles and a turbulent plasma. We have developed a
test-particle code to simulate the interaction of charged particles with turbulent magnetic fields. Diffusion coefficients along and across the mean magnetic field
are calculated and compared to different analytical
theories. Different...
M. Ostrowski
(Astronomical Observatory, Jagiellonian University, ul. Orla 171, 30-244 Kraków, Poland)
01/08/2015, 15:30
The SST-1M is one of three prototype small-sized telescope designs proposed for the Cherenkov Telescope Array, and is built by a consortium of Polish and Swiss institutions. The SST-1M will operate with DigiCam - an innovative, compact camera with fully digital read-out and trigger electronics. A high level of integration will be achieved by massively deploying state-of-the-art multigigabit...
Mr
Petr Gololobov
(ShICRA of SB RAS)
01/08/2015, 15:30
We present the results of studies of zonal harmonics of the cosmic ray distribution during geomagnetic storms. Zonal harmonics have been determined using a global survey method as a variant of spherical analysis of the world neutron monitor network data. We have analyzed 56 major geomagnetic storms observed in 1997 - 2005. It is shown that a sharp increase (> 0.7%) of zonal component amplitude...
Prof.
Ivan De Mitri
(Univ. of Salento and INFN, Lecce, Italy)
01/08/2015, 15:30
The ARGO-YBJ experiment, a full coverage extensive air shower (EAS) detector located at high altitude (4300 m a.s.l.) in Tibet-China, has been operated with very high stability from the fall 2007 to the beginning of 2013. The array consisted of a carpet of about 7000 m$^2$ Resistive Plate Chambers (RPCs) operated in streamer mode and equipped with both digital and analog readout, providing the...
Valentina Antonova
(National Center for Space Research and Technology)
01/08/2015, 15:30
Results of the study of data of the detection of high-energy and thermal neutrons on Tien-Shan experimental complex at different stages of thunderstorm activity are presented. We found that the standard deviation of minute values of the neutron monitor data during thunderstorms always exceeds values under fair weather conditions. We selected events during the passage of thunderstorm clouds...
Dr
T.C. Liu
(LeCosPA and Department of Physics, National Taiwan university)
01/08/2015, 15:30
Extremely high energy neutrinos are attenuated by the materials surrounding the neutrino detector. Topography data can provides spatial distribution of material and become an essential factor in high energy neutrino experiment, especially for the earth skimming neutrino experiment. This study introduced the Antarctica topography data, including composite layers of rock, ice, and water, to...
Dr
Xunxiu Zhou
(School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China)
01/08/2015, 15:30
It has been found that most of the near earth thunderstorms electric field strength at YBJ (4300 m a.s.l., Tibet, China) is within the range of 1000V/cm from ARGO-YBJ data. In this work, Monte Carlo simulations were performed by CORSIKA to study the intensity change of the ground cosmic rays in near earth thunderstorms electric fields. We found that the number of electrons in secondary...
Alexandru Gherghel-Lascu
(IFIN-HH Bucharest)
01/08/2015, 15:30
In previous studies based on CORSIKA EAS simulations with the QGSJet-II-02 hadronic interaction model, the observables S(200) and S(500) (the charged particle densities at 200m and 500m from the shower axis) were found to be good candidates for mass discrimination and energy estimation.
In order to study the effects of new hadronic interaction models on the reconstruction of EAS from the...
Prof.
Huanyu Jia
(School of Physical Science and Technology, Southwest Jiaotong University)
01/08/2015, 15:30
Studies on energy changes of cosmic ray electron in thunderstorms electric field are very important to understand the acceleration mechanism of secondary charged particles caused by electric field. In this paper, Monte Carlo simulations were performed by CORSIKA to study the energy of cosmic ray electron in two typical electric fields. One is upper than the threshold field strength resulting...
Oleg Shchegolev
(Institute for Nuclear Research, Russia, Moscow)
01/08/2015, 15:30
PRISMA-YBJ is a novel type array to study Extensive Air Showers (EAS) in the range of 10^14-10^16 eV. The main feature of this type array is the simultaneous measurement of the electron and the neutron components of EAS on all area of array with the same scintillator detectors (en-detectors). This allows detailed studies of low-investigated hadronic component in the "knee" region. The...
Kazumasa Kawata
(ICRR, University of Tokyo)
01/08/2015, 15:30
More than 100 gamma-ray sources have been detected by the Cherenkov telescopes in the energies from sub-TeV to multi-TeV. On the other hand, the extensive air shower (EAS) arrays, such as the Tibet air shower array, the ARGO-YBJ and the Milagro, have observed several gamma-ray sources with the wide field of view and higher energy threshold than the Cherenkov telescopes.
Aiming at 100 TeV...
Rocío García Gínez
(Instituto de Geofísica, Universidad Nacional Autónoma de México)
01/08/2015, 15:30
The operating principles of Neutron Monitors are nuclear reactions within the proportional counters. The output signal of these is an electric pulse for every secondary cosmic ray particle that interacts with the detector. Then, the amplitude of the pulse signal reflects the amount of charge generated on each individual interaction. The estimated pulse height distribution provides an energy...
Dr
Alexander Borisov
(P.N.Lebedev Physical Institute of RAS, Moscow, Russia)
01/08/2015, 15:30
One-year exposition data on absorption of high-energy cosmic ray hadrons with energies of tens of TeV in two-tier X-ray emulsion chamber (XREC) with large air gap ($\sim$ 2.2 m) are presented. The experiment was carried out at the Tien Shan High Mountain Research Station located at the altitude of 3340 m a.s.l. It is shown that the abnormal behavior of the hadron absorption curve, which was...
Prof.
Lev Dorman
(Tel Aviv University (Israel) and IZMIRAN (Russia))
01/08/2015, 15:30
L.I. Dorman1,2, P.Paschalis3, C. Plainaki4, H. Mavromichalaki3
1Israel Cosmic Ray & Space Weather Centre and Emilio Ségre Observatory,
Tel Aviv University, Israel
2IZMIRAN, Moscow, Russia
3 Nuclear and Particle Physics Department, Physics Faculty, National and Kapodistrian University of Athens, 15784 Athens, Greece
4INAF, Institute of Space Astrophysics and Planetology, Via del Fosso...
Prof.
Shuwang Cui
(Hebei Normal University, China)
01/08/2015, 15:30
The Large High Altitude Air Shower Observatory (LHAASO) project is a new generation instrument, which will be built at 4400m above sea level in Daocheng, Sichuan province, China. With a sensitivity of 10 mili-Crab, LHAASO will survey the northern sky in the declination band from -10° to 70° with a 100% duty cycle. With the wide field-of-view, LHAASO can observe not only the γ-ray point...
Mrs
Saba Mortazavi Moghaddam
(Semnan University)
01/08/2015, 15:30
The first phase of the Alborz Observatory Array (Alborz-I) is designed to have 20 scintillation detectors to study the cosmic ray spectrum in the energy range of $10^{12}$ eV to $10^{16}$ eV. In order to collect data under stable environmental conditions, a sub-array consists of 5 plastic scintillation detectors on a pentagon with side of 5 m similar to the central cluster of the Alborz-I have...
Peter Eger
(MPIK Heidelberg)
01/08/2015, 15:30
The unidentified very high energy (VHE, E > 100 GeV) gamma-ray source HESS J1507-622 seems to not fit into standard models for sources related to young supernova remnants, pulsar wind nebulae, or young stellar populations in general. This is due to its intrinsically extended, but yet compact morphology, coupled with a relative large offset (3.5 deg) from the Galactic plane. Therefore, it has...
Mr
Fabian Temme
(TU Dortmund)
01/08/2015, 15:30
The First G-APD Cherenkov Telescope (FACT) is an Imaging Air Cherenkov Telescope located on the Canary Island of La Palma. It is the first of its kind which uses Geigermode-Avalanche Photo Diodes (G-APDs) as photosensors to detect the Cherenkov radiation emitted from secondary particles in a high-energy gamma-ray air shower.
A new analysis chain was developed using modern data mining methods...
Fabian Temme
(TU Dortmund)
01/08/2015, 15:30
The First G-APD Cherenkov Telescope (FACT) is an Imaging Air Cherenkov Telescope (IACT) located on the Canary Island of La Palma.
Its target is to provide long term monitoring of stellar objects like Active Galactic Nuclei.
FACT is the first IACT to use Silicon Photomultipliers instead of conventional PMTs.
Therefore studying the detector properties is especially important.
An event...
Dr
Nicola Mori
(University of Florence and INFN Florence)
01/08/2015, 15:30
Muon radiography is a well-estabilished technique which is widely used in investigating the internal density structure of targets of different size and composition. Some examples of successful applications are the search for hidden chambers in archaeological sites and the monitoring of geological structures like volcanoes. The two main approaches to muon radiography are based on the effects of...
Dr
Marek Siluszyk
(Siedlce University)
01/08/2015, 15:30
Data of super neutron monitors, Bx, By, Bz components of the Interplanetary Magnetic Field (IMF) have been used to study relations of the long-period variations of the Galactic Cosmic Rays (GCRs) intensity with IMF turbulence for the period of 1968-2014. We find that the changes of the rigidity spectrum exponent γ of the GCR intensity variations and the exponents vy, νz, νx of the Power...
Dr
Anthony Brown
(Durham University)
01/08/2015, 15:30
A small subset of IceCube's extraterrestrial neutrino candidates are detected as track events. The track-like nature of these events within the IceCube detector affords us a ~1 degree angular resolution for the neutrino's origin. This neutrino angular resolution is comparable to the angular resolution of the Fermi Large Area Telescope (LAT) for ~1 GeV photons. Utilising a deep LAT exposure and...
Dr
Riccardo Rando
(University of Padova & INFN Padova, Italy)
01/08/2015, 15:30
The Cherenkov Telescope Array (CTA) is a future ground-based gamma-ray astronomy detector that will consist of several tens of
Imaging Atmospheric Cherenkov Telescopes of different sizes. The total reflective surface of roughly 10,000 m^2 requires unprecedented
technological efforts towards a cost-efficient production of light-weight and reliable mirror substrates at high production rate....
Dr
Anthony Brown
(Durham University)
01/08/2015, 15:30
The GCT is a dual-mirror Small-Sized-Telescope (SST-2M) prototype proposed for the Cherenkov Telescope Array (CTA). Calibration of the GCT's camera is primarily achieved with LED-based flasher units capable of producing ~4 ns (FWHM) pulses of 400 nm light across a large dynamic range, from 0.1 up to 1000 pe. The flasher units are housed in the four corners of the camera's focal plane and...
Prof.
Jose Valdes-Galicia
(UNAM)
01/08/2015, 15:30
We studied cosmic ray intensity variations in the daily data of the database of the Mexico City neutron monitor station during the period 1990 to 2014 using wavelet transforms to determine the power density function and its time evolution, with which we have identified the mid- and long-term variations present in the registers. We give the corresponding confidence levels for the periodicities...
Andrii Neronov
(University of Geneva)
01/08/2015, 15:30
Neutrino telescope IceCube has recently discovered astrophysical neutrinos with energies in the TeV-PeV range. We use the data of Fermi gamma-ray telescope to demonstrate that the neutrino signal has significant contribution from the Milky Way galaxy. Matching the gamma-ray and neutrino spectra we find that TeV-PeV Galactic cosmic rays form a powerlaw spectrum with the slope $p\simeq 2.5$....
Zigfried Hampel-Arias
(UW Madison)
01/08/2015, 15:30
The High-Altitude Water Cherenkov (HAWC) Observatory is a ground based air shower array deployed on the slopes of Volcan Sierra Negra in the state of Puebla, Mexico. While HAWC is optimized for the detection of gamma-ray induced air showers, the background flux of hadronic cosmic-rays is 4 orders of magnitude greater, making background rejection paramount for gamma-ray observations. On...
Dr
Christophe Hugon
(INFN)
01/08/2015, 15:30
Neutrinos have a very important role in the multi-messenger astronomy, therefore, in recent years, larges underwater and under-ice neutrinos telescopes have been designed to allow the detection of high energy neutrinos. The neutrino energy spectrum and direction are inferred based on the detection of the Cherenkov light induced by the secondary charged particles in the medium.
Optical modules...
Moritz Hütten
(DESY Zeuthen)
01/08/2015, 15:30
The questions about the origin and type of cosmic particles are not only fascinating for scientists in astrophysics, but also for young enthusiastic high school students. To make them familiar with research in astroparticle physics, the Pierre Auger Collaboration agreed to make 1% of its data public available. The Pierre Auger Observatory investigates the cosmic rays at the highest energies...
Behrouz Khiali
(University of São Paulo)
01/08/2015, 15:30
Detection of astrophysical high energy (HE) neutrinos in the range of TeV- PeV energies by IceCube observatory has opened new era in high energy astrophysics. Neutrinos with energies ~ PeV imply that they are originated from a source where cosmic rays (CRs) can be accelerated up to ~1017eV. Recently it has been shown that the observed TeV gamma-rays from radio galaxies may have a hadronic...
Delia Tosi
(WIPAC / UW Madison),
Kyle Jero
(WIPAC / UW Madison)
01/08/2015, 15:30
The IceCube neutrino observatory includes a surface array, IceTop, designed to detect and study cosmic rays. This array, located directly above IceCube, can be used to distinguish astrophysical neutrinos from atmospheric neutrinos and penetrating muons, increasing the effective volume of the IceCube detector for the southern sky. In this contribution we present the efficiency of such a veto...
Douglas Bergman
(University of Utah)
01/08/2015, 15:30
Air showers with primary energies between 3 and 100 PeV which are pointed toward TALE give rise to an optical signal dominated by Cherenkov radiation rather than fluorescence light. The reconstruction of these showers can be greatly improved for a sample of these showers by placing a small (400 m square) array of non-imaging Cherenkov counters (25 counters) below the field of view of TALE....
Marcel Zoll
(Stockholm Universitet)
01/08/2015, 15:30
Gravitationally captured Dark Matter in the form of Weakly Interacting Massive Particles (WIMPs) can annihilate into standard-model particles, such as neutrinos. The IceCube neutrino detector at the South Pole is an excellent instrument to search for such a neutrino signal from the Sun. We present an alternative analysis approach which improves on previous ones, in background-dominated regions...
Dr
Mauricio Bustamante
(Center for Cosmology and Astroparticle Physics, The Ohio State University)
01/08/2015, 15:30
Gamma-ray bursts (GRBs) conceivably contribute to the flux of ultra-high-energy (UHE) cosmic rays and neutrinos, with the latter expected to be produced in proton-photon interactions inside the relativistic plasma jets of GRBs. We consider UHE particle production in a model where cosmic rays are emitted both as neutrons and as protons that are able to overcome their magnetic confinement and...
Carlo Francesco Vigorito
(University & INFN Torino, Italy)
01/08/2015, 15:30
The Cherenkov Telescope Array is a world wide project with the aim of exploring the highest energy region of the electromagnetic spectrum. With two arrays, one for each hemisphere, it will guarantee the full sky coverage in the energy range from few tens of GeV to hundreds of TeV, with improved angular resolution and a sensitivity in the TeV energy region better by one order of magnitude than...
Dr
Ivan Petukhov
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)
01/08/2015, 15:30
The analysis of groundbased measurements of cosmic ray intensity and geomagnetic field during the 96 interplanetary shocks passing by Earth was fulfilled. It was shown that most part of the shocks (49 of 96) were accompanied by simultaneous effects – decreases in the cosmic ray intensity and geomagnetic field. But there was no amplitude accordance: more part of the strong and moderate...
Dr
Dirk Pandel
(Grand Valley State University)
01/08/2015, 15:30
MGRO J1908+06 is a bright, extended TeV gamma-ray source located near the Galactic plane. The TeV emission has previously been attributed to the pulsar wind nebula (PWN) of the nearby Fermi-LAT pulsar PSR J1907+0602. However, studies of the TeV morphology with VERITAS have shown that MGRO J1908+06 is somewhat larger than other PWNe of a similar age and that the TeV spectrum does not soften...
Dr
Anna Uryson
(Lebedev Physical Institute, RAS)
01/08/2015, 15:30
The main problem of ultra-high energy cosmic rays (UHECRs) is where they come from. Point UHECR sources seem to be appropriate but they are not discovered. Information about UHECR origin is obtained from particle energy spectrum. In space, particles lose energy in interaction with cosmic microwave background. This results in a lack of particles at E>10^20 eV at the Earth (GZK-effect) if UHECRs...
Mr
Petr Gololobov
(ShICRA of SB RAS)
01/08/2015, 15:30
In this work the dynamics of tensor anisotropy of cosmic rays during the passage of large-scale disturbances of the solar wind for the 22-24 solar cycles is studied. The information on the anisotropy was obtained using a global survey method by data of the worldwide neutron monitor network. For the analysis of the obtained results the data on the interplanetary magnetic field state and solar...
Anastasia Petukhova
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy)
01/08/2015, 15:30
Collisionless shocks in space conditions are a source of energetic particles. The particles having low velocity along the normal to the surface of the shock front can be multiply reflected from the electric cross potential of a quasiperpendicular shock and be accelerated by shock surfing. Shock surfing can provide pre-acceleration of particles for subsequent diffusive shock acceleration. The...
Dr
Jaroslaw Stasielak
(Institute of Nuclear Physics PAN, Kraków, Poland)
01/08/2015, 15:30
We investigate the feasibility of the radar technique for extensive air shower detection. A set of simulations of radio wave reflection off the short-lived plasma produced by the high-energy showers in the air is performed, considering various radar setups and shower geometries. We show that the plasma produced by air showers should be treated always as underdense. Thus, we use the Thomson...
Mario Bertaina
(Univ. & INFN Torino)
01/08/2015, 15:30
Previous results obtained by KASCADE-Grande using QGSjetII-02, EPOS1.99 and SIBYLL hadronic interaction models have shown that the energy spectrum of cosmic rays between 10^16 eV and 10^18 eV exhibits a significant hardening at approximately 2 x 10^16 eV, a slight but statistically significant steepening close to 10^17 eV, the `knee', caused by the heavy component of primary cosmic rays, and...
Mr
Mikhail Amelchakov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
01/08/2015, 15:30
The URAN array for EAS study is now under construction in MEPhI in collaboration with INR RAS. The basic element detector for the array is EN-detector sensitive to both thermal neutron and electromagnetic components. For this study we developed a novel type of EN-detector based on a thin layer of alloyed mixture of inorganic scintillator ZnS(Ag) with B_2О_3 as a target for neutrons. Main...
Dr
Roberto Iuppa
(University of Rome Tor Vergata),
giuseppe di sciascio
(INFN Roma Tor Vergata)
01/08/2015, 15:30
Understanding the energy spectrum and the mass composition in the range 10 TeV - 10 PeV is crucial to establish a robust model of galactic cosmic rays. To do that, precise measurements are needed, with systematic uncertainties sufficiently low to discriminate among models. In this regard, the issues of the energy and the mass of the knee are scientific cases of particular importance. Contrary...
Hiroki ROKUJO
(Nagoya University)
01/08/2015, 15:30
Nuclear emulsion is a high resolution 3D tracking device. 0.2 $\mu$m AgBr crystals penetrated by a charged particle grow into 0.8 $\mu$m silver grains which can be observed as a track by a microscope via chemical development process. The recent fully automated readout systems enabled not only high resolution measurements but also large-scale experiments (accelerator experiments, balloon-borne...
Mr
Gabriele Cologna
(LSW Heidelberg)
01/08/2015, 15:30
The high-frequency peaked BL Lac object 1ES$\,$0229+200 (z$\,$=$\,$0.14) was first detected in very high energy (VHE, E$\,$>$\,$100$\,$GeV) $\gamma$-rays by the H.E.S.S. (High Energy Stereoscopic System) collaboration in 2006. No variability was reported in the source in the initial study and its spectral characteristics have been used to derive constraints on the extragalactic background...
Dr
Vladimir Makhmutov
(Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia)
01/08/2015, 15:30
The experimental data on galactic cosmic ray fluxes in the atmosphere are presented for 5 eleven year solar cycles from the 19-th solar cycle till the 24-th one. The cosmic ray data were obtained in the northern and southern polar atmospheres and in the northern atmosphere of the middle latitude. The analysis of monthly averages is made, namely: the relationship cosmic ray fluxes with solar...
Rickard Stroem
(Uppsala University)
01/08/2015, 15:30
IceCube searches for neutrino point sources in the southern sky have traditionally been restricted to energies well above 100 TeV, where the background of down-going atmospheric muons becomes sufficiently low to be tolerated in searches. Recent developments of a data stream dedicated to the study of low-energy neutrinos from the Southern hemisphere enables searches to be extended far below...
Dr
Xunxiu Zhou
(School of Physical Science and Technology, Southwest Jiaotong University)
01/08/2015, 15:30
ARGO-YBJ, located at the YangBaJing Cosmic Ray Observatory (4300m a.s.l., Tibet, China), is a full coverage air shower array, with an energy threshold of about 300 GeV for gamma ray astronomy. Most of the recorded events are single showers, satisfying the trigger requirement of at least 20 particles detected in a given time window. However, in ~5% of the events, two randomly arriving showers...
Alessandro Carosi
(INAF-ASDC)
01/08/2015, 15:30
The BL Lac object RBS 0723 is an extreme BL Lac object (EHBL) candidate. These sources are known to show an extreme frequency of their synchrotron and inverse Compton peaks in the spectral energy distribution (in the hard X-ray and TeV bands respectively). Furthermore, they are characterized by the extreme hardness of the UV-X-ray and intrinsic TeV continua. These characteristics are usually...
Igor Petrov
(Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy)
01/08/2015, 15:30
In the paper are present the new results for the mass composition of cosmic rays, obtained of the energy region 10^16 – 10^18 eV. The data were obtained at Small Cherenkov array over a 20 - year period of continuous observation. The our experimental data are indicate at changed in the mass composition in the energy range 10^16 - 10^18 eV and it’s confirmed by independent results obtained by...
Ralph Richard Engel
(KIT - Karlsruhe Institute of Technology (DE))
01/08/2015, 15:30
The flux of atmospheric leptons is the main background for measurements of astrophysical
neutrinos. This natural beam can be used in studies of neutrino phenomenology at very
high energies, such as in searches for sterile neutrinos or the determination of the mass hierarchy.
The success of the measurements crucially depends on the precision of theoretical calculations. The
presented...
Dr
Pierre-Simon MANGEARD
(National Astronomical Research Institute of Thailand, Mahidol University)
01/08/2015, 15:30
Neutron monitors are the premier instruments for precise measurements of time variations (e.g., of solar origin) in the Galactic cosmic ray (GCR) flux in the range of ∼1-100 GeV. However, it has proven challenging to accurately determine the yield function (efficiency) vs. rigidity in order to relate a neutron monitor’s count rate with those of other monitors in the worldwide network and the...
Ms
Zhen Tian
(Institute of high energy physics)
01/08/2015, 15:30
In gamma-ray astronomy, the time structure of the shower front is crucial to improve the angular resolution of primaries for ground-based experiments. With its full coverage detection area, high time resolution and excellent spatial granularity, the ARGO-YBJ experiment offers a good opportunity to study in detail the temporal behavior of the gamma-ray shower fronts. In this work, by using the...
Anna Nelles
(Radboud University Nijmegen)
01/08/2015, 15:30
The ARIANNA collaboration has recently completed the installation of a seven-station hexagonal array of radio detectors. This Hexagonal Radio Array (HRA) serves as a prototype for a large neutrino telescope planned for construction on the Ross Ice Shelf of Antarctica. Upgraded hardware installed during the 2014 deployment season will be summarized. A review of ice properties at the ARIANNA...
Dr
Semen Khokhlov
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
01/08/2015, 15:30
The NEVOD-EAS detector designed for the registration of extensive air showers in the primary particle energy range of 10^15 – 10^17 eV is currently being created on the basis of the experimental complex NEVOD-DECOR. The measuring system of the NEVOD-EAS detector has a cluster organization and is located in the MEPhI campus (Moscow, Russia). In total, the detector includes 12 clusters of...
Zigfried Hampel-Arias
(UW Madison)
01/08/2015, 15:30
The High-Altitude Water Cherenkov (HAWC) Observatory records the air showers produced by cosmic rays and gamma rays at a rate of about 15 kHz. While the events observed by HAWC are 99.9% hadronic cosmic rays, this background can be strongly suppressed using topological cuts that preferentially select electromagnetic air showers. Using this capability of HAWC, we can create a sample of air...
Konstantin Herbst
(Christian-Albrechts-Universität zu Kiel)
01/08/2015, 15:30
Neutron monitors (NMs) are ground-based devices to measure the variation of cosmic ray intensities. They are reliable devices but difficult to install because of their size and weight. Therefore a portable mini NM (MNM) that can be installed as an autonomous station at any location that provides suitable conditions has been developed recently. The first continuous measuring MNMs are installed...
Stefan Geißelsöder
(FAU Erlangen)
01/08/2015, 15:30
ANTARES is the largest operational neutrino telescope in the Northern Hemisphere, located in the Mediterranean Sea at a depth of 2500 metres. The direction and energy of the observed particles are reconstructed from the
time and amplitude information recorded by the photomultipliers. The collected set of reconstructed events can be analysed with respect to the spatial, temporal and energy...
Xin Wu
(Universite de Geneve (CH))
01/08/2015, 15:30
The Data Acquisition system (DAQ) of the future Cherenkov Telescope Array (CTA) must be efficient, modular and robust to be able to cope with the very large data rate of up to 100 GByte/s coming from many telescope with different characteristics. The use of modern middleware, namely zeroMQ and protocol buffers, helped to achieve these goals while keeping the development effort to a reasonable...
Mr
Martin Schrön
(Helmholtz Centre for Environmental Research - UFZ)
01/08/2015, 15:30
Neutron monitors on Earth are usually used to track the dynamics of incoming cosmic-ray particles under the assumption that local environmental conditions do not influence the highly shielded signal. Oppositely, in a young research field the local dynamics of environmental water is monitored by detecting less moderated cosmic-ray neutrons. Water in soil, air, snow and vegetation determines...
Mr
Thomas Armstrong
(Dept. of Physics and Centre for Advanced Instrumentation, Durham University,UK)
01/08/2015, 15:30
The Gamma-ray Cherenkov Telescope (GCT) is an innovative dual-mirror solution to the small-size telescopes
for CTA, capable of imaging the Cherenkov light produced in the atmosphere by cosmic gamma rays with energies
from a few TeV to hundreds of TeV. The reduced plate scale resulting from the secondary optics allows the use
of compact photosensors, including multi-anode photomultipliers...
Dr
Dariusz Gora
(Humboldt University)
01/08/2015, 15:30
IceCube is capable of monitoring the whole sky continuously, while optical and high energy photon telescopes have limited fields of view and are not likely to observe a potential neutrino-flaring source at the time such neutrinos are recorded. The use of neutrino-triggered alerts thus aims at increasing the availability of simultaneous multi-messenger data, which can increase the discovery...
Luiz da Silva
(University of Wisconsin - Milwaukee)
01/08/2015, 15:30
The recent observation of an astrophysical flux of neutrinos at the IceCube telescope represents the ''first light'' in the burgeoning field of neutrino astronomy. Motivated by this long-awaited discovery, we re-examine the potential high energy neutrino emission from compact binaries on the basis of state-of-the-art proton acceleration models, and interaction of those protons with plasma...
Mr
arvind dubey
(rani durgawati university jabalpur india)
01/08/2015, 15:30
Neutron monitor have recorded the flux of high energy cosmic rays from more than half century .Cosmic rays counts from the ground based neutron monitor at different cut off rigidity show intensity changes, which are anti correlated with sunspot numbers. They also lose energy as they propagate towards the Earth and experience various types of modulations due to different solar activity . In...
Alexandre Ghelfi
(Centre National de la Recherche Scientifique (FR)),
David Alain Maurin
(Centre National de la Recherche Scientifique (FR)),
Laurent Yves Marie Derome
(Centre National de la Recherche Scientifique (FR))
01/08/2015, 15:30
Galactic cosmic-ray fluxes (GCR) and neutron monitor (NM) cout rates depend on Solar activity. The modulation levels estimated in previous studies strongly depend on the datasets used (from different NM stations or GCR data) and on the different assumptions made (unknown interstellar flux, NM yield functions, ... ). We discuss an improved method to estimate the modulation parameter φ for any...
Marcos Alfonso Anzorena Méndez
(Instituto de Geofísica, Universidad Nacional Autónoma de México)
01/08/2015, 15:30
Solar neutron telescopes (SNTs) were designed to observe neutrons emitted during solar flares. All SNTs consist of a number of central scintillator plates, surrounded by proportional counters or thin scintillator detectors. Incoming neutrons interact with nuclei within the scintillator and produce recoil protons. The energy of a neutron may be estimated from the light emitted by the recoil...
Igor Moskalenko
(Stanford University)
01/08/2015, 15:30
A dramatic increase in the accuracy and statistics of space-borne cosmic ray (CR) measurements has yielded several breakthroughs over the last several years. The most puzzling is the rise in the positron fraction above 10 GeV over the predictions of the propagation models assuming pure secondary production. Antiprotons are produced in CR interactions with interstellar gas and are, therefore,...
Dr
Kenji Shinozaki
(Unverisity of Tubingen)
01/08/2015, 15:30
The chemical composition of the very high energy cosmic rays (VHECRs) is an important piece of information to investigate their origin and acceleration mechanism. Possible change of chemical composition at the knee energy range has been reported by air shower experiments based on sampling of muons or Cherenkov photons. So far low flux of VHECRs along with uncertainties due to indirect...
Dr
Natalia Barbashina
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
01/08/2015, 15:30
Cosmic rays flux detected on the Earth's surface penetrates the heliosphere and carries information about the processes occurring in it. Muon hodoscope URAGAN allows reconstruct the tracks of cosmic ray muons with a high angular accuracy (about 1 degree) in a wide range of zenith (0-80 degrees) and azimuthal angles (0-360 degrees) in real time. Methods developed for URAGAN muon hodoscope data...
Dr
Makoto Miura
(Kamioka observatory, ICRR, University of Tokyo)
01/08/2015, 15:30
As a general feature, Grand Unified Theories (GUTs) predict that protons will decay someday. Proton decay search needs large detector which contains tremendous number of protons and backgrounds of this search are cosmic rays, especially, atmospheric neutrinos. Super-Kamiokande, which is known as a famous neutrino detector, also has the highest sensitivity for nucleon decays in the world. This...
Kinya Hibino
(Kanagawa University)
01/08/2015, 15:30
To measure the correlation between thundercloud and atmospheric charged particles, we have installed some atmospheric electric field meter at a site on the Tibet Air hower Array 4,300m a.s.l.) since February 2010. In this paper, we report some results of coincident observation of data from the array and atmospheric electric field during thunderstorm.
In addition, we present comparisons of a...
Prof.
Andrea Santangelo
(Institut fuer Astronomie und Astrophysik, Tuebingen)
01/08/2015, 15:30
Similarly to extreme energy cosmic rays (EECRs), neutrinos at energies exceeding $5\times 10^{19}$ eV are expected to interact in the Earth's atmosphere and create extensive air showers. The JEM-EUSO mission, developed to be hosted onboard the JEM module of the International Space Station, aims at detecting these extensive air showers from space by means of the fluorescent and diffusively...
Konstancja Satalecka
(UCM, Spain)
01/08/2015, 15:30
More than one-third of the sources reported in the 1st and 2nd Fermi catalogs (1FGL and 2FGL) lack a clear association with a known astrophysical source, and are known as Unassociated Fermi Objects (UFOs).
We report MAGIC observations of three UFOs selected basing on their high energy spectral properties (e.g. hardness of the spectrum), as well as on additional multiwavelength information,...
Danislav Sapundjiev
(Royal Meteorological Institute of Belgium)
01/08/2015, 15:30
The neutron monitor (NM) remains the best available instrument for monitoring the secondary nucleonic component of the galactic cosmic rays for more than 80 years. Today, NMs have been given another role related to satellite-based technologies for monitoring and forecasting of space weather events. At many sites around the world, the old neutron monitors were refurbished and synchronised into...
John Felde
(University of Maryland)
01/08/2015, 15:30
Gamma Ray Bursts (GRBs) have long been suspected as the sources for the ultra high energy cosmic rays. For this to be true, a mechanism must exist within the GRB to produce hadrons, a consequence of which is the production of neutrinos. So far, no significant observation has been made that suggests GRBs produce neutrinos. The IceCube neutrino Observatory, a cubic kilometer ice Cherenkov...
Jonathan Biteau
(UC Santa Cruz)
01/08/2015, 15:30
Gamma-ray observations in the very-high-energy domain (E > 30 GeV) can exploit the imaging of Cherenkov flashes lasting a few nanoseconds from atmospheric particle showers. Photomultipliers have been used as the primary photosensors to detect gamma-ray induced Cherenkov light for the past 25 years, but they are increasingly challenged by the swift progress of silicon photomultipliers (SiPMs)....
Steven Barwick
(University of California)
01/08/2015, 15:30
The ARIANNA collaboration has recently completed the installation of a seven-station hexagonal array of radio detectors. These detectors seek to measure radio pulses generated by extremely high energy cosmic neutrino interactions. The detectors are deployed on the Ross Ice Shelf of Antarctica and collect data during the austral summer months. Data is delivered off continent in near real-time....
Pierre Colin
(MPI fuer Physik)
01/08/2015, 15:30
MAGIC is a system of two 17m diameter Imaging Atmospheric Cherenkov Telescopes (IACT) located at the Observatorio del Roque de los Muchachos in the Canary island of La Palma. It observes the gamma-ray sky from ~50 GeV to more than 50 TeV. The IACT technique works preferentially in very dark condition. The best performance and lowest energy threshold are reached at dark astrophysical sites...
Mr
Mohammad Hussein
(University of Manitoba)
01/08/2015, 15:30
A model for noisy reduced magneto-hydrodynamic (NRMHD) turbulence was recently proposed. This model was already used to compute the diffusion coefficient of random walking magnetic field lines based on the nonlinear diffusion theory. We use the same model to investigate the
diffusion of energetic particles across the mean magnetic field. To do that we have used two analytical theories,...
Dr
Vladimir Ryabov
(P.N. Lebedev Physical Institute, RAS, Moscow, Russia)
01/08/2015, 15:30
The problem of searching for highest-energy cosmic rays and neutrinos in the Universe is reviewed. Possibilities for using the radio method for detecting particles of energies above the CZK cut-off are analyzed. The method is based on the registration of coherent Cherenkov radio emission produced by cascades of most energetic particles in radio-transparent lunar regolith. The Luna-26 space...
705.
Photon Counting with a Fully Digital FDIRC (Focused Differential Internal Reflection Cherenkov)
Pier Simone Marrocchesi
(University of Siena (IT) and INFN Pisa)
01/08/2015, 15:30
A prototype of an Internal Reflection Cherenkov, with a SiO2 (Fused Silica) radiator bar optically connected to a cylindrical mirror, was tested at CERN SPS in March 2015 with a beam of relativistic ions obtained from fragmentation of primary argon nuclei at energies 13 and 30 GeV/n. The detector, designed to identify cosmic nuclei, features an imaging focal plane of dimensions ~4 cm x 3 cm...
Shoushan Zhang
(Institute of High Energy Physics)
01/08/2015, 15:30
The PMT array is the most important detection unit for IACT. The high precision Cosmic ray energy spectrum measurement relies on the performance of the PMT array. The PMT gain can be ageing over time, which can impact the performance of the PMT array. A facility of photoelectron meter is developed for high precision online nonlinearity calibration and monitoring the performance of the PMT...
Alexandru Gherghel-Lascu
(IFIN-HH Bucharest)
01/08/2015, 15:30
The primary energy of cosmic rays is reconstructed at KASCADE-Grande using different approaches based on different sets of recorded observables. We present the results of an approach based on the S(500) observable which is the charged particle density recorded at 500 m distance from the shower axis. Previous investigations based on CORSIKA simulations (with QGSJet-II-2 model embedded for high...
Iurii Sushch
(North-West University)
01/08/2015, 15:30
Blazars, a class of radio-loud active galactic nuclei with their jets pointed close to the line of sight to Earth, are the most abundant extragalactic gamma-ray sources detected both by the Fermi Gamma-Ray Space Telescope and by groundbased atmospheric Cherenkov Telescope facilities. Most blazars are known to be hosted in giant Elliptical galaxies, but their cluster environments are poorly...
Carlo Francesco Vigorito
(Universita' di Torino),
Silvia Vernetto
(Istituto Nazionale di Astrofisica)
01/08/2015, 15:30
The LHAASO (Large High Altitude Air Shower Observatory) experiment, currently under
design, is planned to be installed in the Sichuan Province (China) at 4410 m a.s.l.
with the aim
of studying the highest energy gamma-ray sources and cosmic rays in the wide energy
range from hundreds of GeV to hundreds of TeV. Among its different components,
optimized to study different energy regions,...
Elisabetta Bissaldi
(INFN Bari)
01/08/2015, 15:30
The first Gamma-Ray Burst catalog presented by the Fermi-LAT collaboration includes 28 GRBs, detected above 100 MeV over the first three years since the launch of the Fermi mission. However, more than 100 GRBs are expected to be found over a period of six years of data collection thanks to a new detection algorithm and to the development of a new LAT event reconstruction, the so-called "Pass...
Jacek Niemiec
(Institute of Nuclear Physics PAN, Krakow, Poland)
01/08/2015, 15:30
A single-mirror small-size (SST-1M) Davies-Cotton telescope with a dish diameter of 4 m has been built by a consortium of Polish and Swiss institutions for the southern observatory of the Cherenkov Telescope Array (CTA). The design represents a very simple, reliable, and cheap solution for a small size telescope of CTA. The mechanical structure prototype with its drive system is now being...
Iurii Sushch
(North-West University)
01/08/2015, 15:30
The initially unidentified very high energy (VHE; E > 100 GeV) gamma-ray source HESS J1303-631 was recently associated with the pulsar PSR J1301-6305 basing on its enregy-dependent morphology. Subsequent detection of X-ray and GeV counterparts also support the identification of the H.E.S.S. source as evolved pulsar wind nebula (PWN). We report here on recent radio observations of the PSR...
Jan Ebr
(Institute of Physics, Prague)
01/08/2015, 15:30
The Cherenkov Telescope Array (CTA) is the next generation of ground-based very high energy gamma-ray instruments and will be built on two sites (one in each hemisphere) in the coming years, with full array operation foreseen to begin 2020. The goal of performing a high precision gamma-ray energy measurement while maximizing the use of observation time demands detailed and fast information...
Dr
A.W. Strong
(MPE Garching)
01/08/2015, 15:30
Recent extensions to GALPROP
Some recent extensions to the GALPROP cosmic-ray propagation package will be described.
These are built on the public version released a few years ago.
The enhancements include: an accurate solution option, improved convection formulation, alternative spatial boundary conditions, polarized synchrotron emission,
new magnetic field models, updated...
Dr
Adrian C. Rovero
(Instituto de Astronomia y Fisica del Espacio (IAFE, CONICET-UBA))
01/08/2015, 15:30
Gamma-ray emission in the range of VHE (TeV) is strongly attenuated by the photon-photon interaction with the extragalactic background light (EBL), the diffuse cosmological radiation field (UV to far-IR) encompassing all radiative energy releases since recombination. As a consequence all discovered VHE sources are relatively close (z <0.6, except perhaps for the recent detection of the blazar...
Luigi Antonio Fusco
(University of Bologna)
01/08/2015, 15:30
KM3NeT is a future research infrastructure hosting the next-generation underwater neutrino observatory in the Mediterranean Sea. Within KM3NeT, the ORCA detector will be devoted to the measurement of the neutrino mass hierarchy, by investigating matter-induced effects in the oscillation pattern of atmospheric neutrinos. The main background for this search is given by atmospheric muons coming...
Dr
Olga Kryakunova
(Instutute of Ionosphere, Almaty, Kazakhstan)
01/08/2015, 15:30
Variations of the cosmic ray vector anisotropy observed on Earth are closely related on the condition of near the Earth interplanetary medium. The hourly characteristics of vector anisotropy obtained by the global survey method from the data of world wide neutron monitor network during 1957-2013 allow us to investigate connection of the cosmic ray anisotropy with the solar wind parameters. In...
Dr
Pierre-Simon MANGEARD
(National Astronomical Research Institute of Thailand, Mahidol University)
01/08/2015, 15:30
Neutron monitors are the premier instruments for precisely tracking time variations in the Galactic cosmic ray flux at GeV-range energies above the geomagnetic cutoff at the location of measurement. In addition to the count rate, recording and analysing the time delays between successive counts allows us to infer variations in the cosmic ray spectrum as well. In particular, we can determine...
Changqing Feng
(University and Science and Technology of China)
01/08/2015, 15:30
A satellite-borne high energy cosmic ray detector to be launched in the near future, named DArk Matter Particle Explorer (DAMPE), is now being developed in China. The major scientific objectives of DAMPE mission are primary cosmic ray, gamma ray astronomy and dark matter particles, by observing cosmic rays with an energy range from 5 GeV to 10 TeV. An electromagnetic calorimeter, which...
Iurii Sushch
(North-West University)
01/08/2015, 15:30
PSR B1259-63/LS 2883 is a very high energy (VHE; E > 100 GeV) gamma-ray emitting binary consisting of a 48 ms pulsar orbitting around a Be star with a period of 3.4 years. The Be star features a circumstellar disk which is inclined with respect to the orbit in such a way that the pulsar crosses it twice every orbit. The circumstellar disk provides an additional field of target photons which...
Prof.
Kazuoki Munakata
(Department of Physics, Shinshu University, Asahi, Matsumoto 390-8621, JAPAN.)
01/08/2015, 15:30
We plan to use the SciCRT as a new muon detector and fill a gap remaining in the viewing directions of the present GMDN which currently consists of four multi-directional muon detectors in Japan, Australia, Brazil and Kuwait. In order to minimize the data acquisition time, the muon measurement is triggered by the four-fold coincidence between pulses from the top and bottom pairs of the x- and...
giuseppe di sciascio
(INFN Roma Tor Vergata)
01/08/2015, 15:30
Detection of gamma rays from the annihilation or decay of dark matter particles is a promising method for identifying dark matter, understanding its intrinsic properties, and mapping its distribution in the universe.
The searches feature many different target types, including dwarf spheroidal galaxies, galaxy clusters, the Milky Way halo and inner Galaxy and unassociated Fermi-LAT...
Dr
Dmitri Ivanov
(University of Utah)
01/08/2015, 15:30
From about 1-3 EeV, results from the HiRes, Telescope Array, and Pierre Auger experiments all indicate that cosmic ray composition is light, probably protonic. Since this energy range is above the critical energy of the galactic magnetic field, if these cosmic rays are of galactic origin there should be an anisotropy in their arrival directions at the earth. We will present a calculation of...
Reetanjali Moharana
(University of Johannesburg)
01/08/2015, 15:30
Detection of 35 very high-energy (VHE) neutrinos by the IceCube Neutrino Observatory has opened a new chapter in multi-messenger astronomy. Due to large errors in measuring the directions of the neutrino shower-type events, which dominate the current event list, it is difficult to identify their astrophysical sources. We perform cross-correlation study of IceCube neutrino events with...
493.
Search for GRB neutrino emission according to the photospheric model with the ANTARES telescope
Matteo Sanguineti
(INFN Genova - Università di Genova)
01/08/2015, 15:30
The ANTARES detector is the largest neutrino telescope currently in operation in the North Hemisphere.
One of the main goals of the ANTARES detector is the search for point-like neutrino sources including transient sources like GRBs.
In the so-called photospheric model for the emission from GRBs the interaction of the radiation field with the leptonic component of the outflow could lower...
Mr
Giuliano Maggi
(Vrije Universiteit Brussel)
01/08/2015, 15:30
The recent discovery of high-energy cosmic neutrinos by the IceCube neutrino observatory opens up a new field in physics, the field of neutrino astronomy. Using the IceCube neutrino detector we plan to search for high energy neutrinos emitted from Active Galactic Nuclei (AGN). AGN are believed to be one of the most promising sources for emitting these weakly interacting particles. We discuss a...
Ms
Gabriela Pavalas
(Institute of Space Science)
01/08/2015, 15:30
About thirty years ago, strange quark matter (SQM) was hypothesized to be the ground state of hadronic matter and was also suggested as a cold dark matter candidate. Although there is no experimental or astrophysical evidence for its existence so far, SQM may be present in the cosmic radiation as relic particles of the early Universe, or as fragments released in binary strange star collisions...
Segev BenZvi
(University of Rochester)
01/08/2015, 15:30
The High-Altitude Water Cherenkov (HAWC) Observatory is a large field-of-view, high-uptime detector which measures TeV cosmic rays and gamma rays from 2/3 of the sky each day. The large uptime and field of view make the detector well-suited to observe time-dependent emission from objects such as pulsars and TeV binaries. Very high energy gamma rays have been observed from only a small number...
Mr
Damien TURPIN
(ANTARES-CPPM)
01/08/2015, 15:30
Gamma-ray bursts (GRB) are the most energetic transient sources observed in the Universe.
They are supposed to be produced by the emission of an inhomogeneous relativistic jet in
which energy dissipation occurs via internal shocks. In these shocks, particles as electrons and
protons could be accelerated at very high energies via Fermi acceleration processes. Thus,
GRB are promising...
Dr
Gordana Tešić
(Penn State)
01/08/2015, 15:30
Primordial black holes (PBHs) are expected to explode violently during the last few seconds of their lives, producing jets of high energy particles. These particles could be detected in coincidence by several observatories with large fields of view, such as IceCube and ANTARES (neutrinos), HAWC and Fermi LAT (gamma rays) and Pierre Auger (neutrons). The short temporal structure of the...
Prof.
Shuwang Cui
(Hebei Normal University, China)
01/08/2015, 15:30
The PRISMA project developed for cosmic ray study above 30 TeV is now realized as 2 prototypes at different altitudes. Special en-detectors are used for both electron and neutron components recording. An array of 4 such detectors is running in Yang Ba Jing (Tibet, China) at altitude 4300 m a. s. l. since January 2013. To be sure that thermal neutron background is stable we also study its...
Thomas Heid
(Universitaet Erlangen)
01/08/2015, 15:30
A main objective of the future neutrino telescope KM3NeT/ARCA is the detection and measurement of extraterrestrial neutrinos. Atmospheric neutrinos, which are produced in particle showers in the Earth's upper atmosphere, represent the main background to this signal. Muon bundles which accompany downgoing atmospheric neutrinos can be used to differentiate the latter from their extraterrestrial...
Dr
Galina Vankova-Kirilova
(University of Sofia, Bulgaria)
01/08/2015, 15:30
The ultra high energy cosmic neutrinos are source of knowledge for both astrophysical
mechanisms of particle acceleration and fundamental interactions. They open a window into the very distant and high-energy Universe that is difficult to access by any human means and devices. The possibility of detecting them in large exposure space-based apparatus, like JEM-EUSO, is an experimental...
Alexander Mishev
(INRNE-BAS)
01/08/2015, 15:30
Observations of intense sporadic solar-neutron events provide a unique opportunity to study energetic processes of particle acceleration during solar flares. Such neutrons are produced in nuclear reactions of high-energy (from several hundred MeV/nuc to several GeV/nuc) particles in the solar atmosphere and surface. The existing neutron monitor (NM) network provides a continuous record of...
Dr
Luisa Ferreira Da Gama Velho Arruda
(LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)
01/08/2015, 15:30
The Multi-Functional Spectrometer (MFS) is a radiation monitor that together with CTTB (Component Technology Test Bed) make the AEEF-TDP8 (ESA Alphasat Environment and Effects Facility - Technology Demonstration Payload 8). The two units are installed on the X panel of the Alphasat satellite as a hosted payload. MFS is an instrument specifically designed to characterise the Space Radiation...
Stanislav Stefanik
(Institute of Particle and Nuclear Physics, Charles University in Prague)
01/08/2015, 15:30
We describe a straightforward modification of frequently invoked methods
for the determination of the statistical significance of a $\gamma$-ray
signal observed in a counting process.
A simple criterion is proposed to decide whether a set of measurements
of the numbers of photons registered in the source and background regions
is consistent with the assumption of a constant source...
Riccardo Rando
(University and INFN Padova)
01/08/2015, 15:30
The Cherenkov Telescope Array (CTA) is the the next generation facility of Imaging Atmospheric Cherenkov Telescopes; two observatories will cover both hemispheres. CTA will reach unprecedented sensitivity, energy and angular resolution in very-high-energy gamma-ray astronomy. Each CTA array will include four Large Size Telescopes (LSTs), designed to cover the low-energy range of the CTA...
Atsushi Iyono
(Okayama University of Science)
01/08/2015, 15:30
To examine the nuclear emulsion chemical uniformity or Poisson distribution of grains, simulations of electron trajectory have been carried out on the basis of the single elastic scattering Monte Carlo method considering energy straggling processes and their fluctuations. To compare these simulated results, image processing method of charged particle tracks in nuclear emulsion have also been...
Javier Gonzalez
(Bartol Research Institute, Univ Delaware),
Sebastian Euler
(Uppsala University)
01/08/2015, 15:30
Motivated by the evidence of astrophysical neutrinos seen in IceCube, we consider various array configurations of particle detectors and study their efficiency for identifying neutrinos of astrophysical origin when combined with IceCube or a next generation neutrino detector at the South Pole. The identification of astrophysical neutrinos is accomplished by tagging muons and neutrinos of...
Amanda Weinstein
(Iowa State University)
01/08/2015, 15:30
It is anticipated that the forthcoming Cherenkov Telescope Array will include a number of medium-sized telescopes that are constructed using a dual-mirror Schwarzschild-Couder configuration. These telescopes will sample a wide (8 degree) field of view using a densely pixelated camera comprising over $10^{4}$ individual readout channels. A readout frequency congruent with the expected...
David Ruffolo
(Mahidol University)
01/08/2015, 15:30
Ionizing radiation in the Earth’s troposphere is mainly due to Galactic cosmic
rays, but ground level enhancements (GLEs) can produce relativistic ions with such enormous
intensity that their ionization effect in the Earth’s lower atmosphere is significant. One
of the largest GLEs ever observed occurred on January 20, 2005, which resulted
in very large increases in the count rates of...
Dr
Fabian Schüssler
(Irfu, CEA-Saclay)
01/08/2015, 15:30
Microquasars, Galactic binary systems showing extended and variable radio emission, are potential gamma-ray emitters. Indications of gamma-ray transient episodes have been reported in at least two systems, Cyg X-1 and Cyg X-3. The identification of additional gamma-ray emitting microquasars is key for a better understanding of these systems.
Very-high energy gamma-ray emission from...
Dr
Yutaka Matsubara
(STE-Laboratory, Nagoya University)
01/08/2015, 15:30
At 16:06UT on July 8, 2014, an M6.5-class flare was observed at N12E56 of the solar surface.
In association with this flare, solar neutron detectors located on two high mountains, Mt. Sierra Negra and Chacaltaya and at the space station observed enhancements in the neutral channel.
The authors analyzed these data and a possible scenario of enhancements produced by high-energy protons and...
Dr
Elisabetta Bissaldi
(INFN Trieste)
01/08/2015, 15:30
The Italian Institute of Nuclear Physics (INFN) is involved in the development
of a demonstrator for a SiPM-based camera for the Cherenkov Telescope Array experiment, with a pixel
size of 6x6mm$^2$.
The camera houses about two thousands electronics channels and is both light and compact.
In this framework, an R&D program for the development of SiPMs suitable for
Cherenkov light detection...
Dr
Olivia Enriquez-Rivera
(Instituto de Geofisica, UNAM)
01/08/2015, 15:30
The High Altitude Water Cherenkov Observatory (HAWC) is an air shower array located near the volcano Sierra Negra in Mexico. The observatory has a scaler system sensitive to low energy cosmic rays (the geomagnetic cutoff for the site is 8 GV) suitable to perform studies of cosmic ray transients of solar origin such as Ground Level Enhancements (GLEs) and Forbush Decreases (FDs). One important...
George Bashindzhagyan
(M.V. Lomonosov Moscow State University (RU))
01/08/2015, 15:30
The goal of the proposed experiment is to check the evidence for a possible solar influence on nuclear decay rates, and to measure any effect quantitatively.
Simultaneous decay rate measurements with many identical radioactive sources would allow us to study any possible correlations between their rate changes, and to thus improve the accuracy and reliability of the measurements.
Positioning...
Prof.
Akimichi Taketa
(Earthquake Research Institute, University of Tokyo)
01/08/2015, 15:30
Neutrinos have favorable properties for measuring the elemental composition deep inside the earth's interior. First, they propagate a long distance almost undisturbed through the earth due to their weak interactions with matter. Secondly, neutrino oscillations in matter are sensitive to the electron density of the medium traversed by them. Therefore, neutrinos can be used for a probe to...
Renat Sibatov
(Ulyanovsk State University)
01/08/2015, 15:30
Blasi and Amato [1] studied diffusive propagation of cosmic rays (CR) in the Galaxy, taking into account spatial and temporal distribution of supernova remnants, diffusion in halo and spallation of nuclei. In frames of this model based on classic diffusion equation, they calculated the energy spectrum, chemical composition and anisotropy of galactic cosmic rays observed at Earth. They carried...
Patrick Yves Sizun
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
01/08/2015, 15:30
The Cherenkov Telescope Array (CTA) will be the next generation ground-based gamma-ray instrument. It will be made up of approximately 100 telescopes of at least three different sizes, from 4 to 23 meters in diameter.
The previously presented prototype of a high speed data acquisition (DAQ) system for CTA has become concrete within the NectarCAM project, one of the most challenging camera...
Prof.
Huanyu JIA
(School of Physical Science and Technology, Southwest Jiaotong University)
01/08/2015, 15:30
Cosmic ray particle acceleration in supernovae is expected to occur. A protoneutron star is formed in the aftermath of the supernova explosion of a massive star. Therefore, the study of properties and structure of protoentron stars has great implications for investigating the origin and acceleration of cosmic rays. Considering the baryon octet which comprises of the least massive baryons and...
Dr
Nicolas PICOT-CLEMENTE
(Institute for Physical Science and Technology, University of Maryland)
01/08/2015, 15:30
The isotopes $^{2}$H and $^{3}$He in the cosmic radiation are mainly secondary products from interactions of primary cosmic rays in the interstellar medium. Secondary-to-primary ratios give important information on processes that occurred during the propagation of cosmic rays, independent of the unknown source spectrum. Boron-to-Carbon ratio data have been primarily used to study cosmic-ray...
Elisa Prandini
(University of Geneva)
01/08/2015, 15:30
The MAGIC telescopes are an array of two imaging atmospheric Cherenkov telescopes (IACTs) studying the gamma ray sky at very high-energies (VHE; E>100 GeV). The observations are performed in stereoscopic mode, with both telescopes pointing at the same position in the sky. Differently from the other running IACTs, the MAGIC field of view (FoV) acceptance for hadrons and gamma rays has a complex...
Mr
Yifeng Wei
(University of Science and Technology of China)
01/08/2015, 15:30
The DArk Matter Particle Explorer (DAMPE) is an orbital experiment which aims at searching dark matter by measuring the spectra of gamma, electron and positron originating from space. The BGO electromagnetic calorimeter (ECAL) is one of the core sub-detectors of DAMPE for energy measurement from 5 GeV to 10 TeV. The Calorimeter consists of 308 BGO crystal bars with the dimension of...
Maoyuan Liu, Prof.
luobu danzeng
(Department of Physics, Science School, Tibet University)
01/08/2015, 15:30
Owing to the advantages in the wide field of view, high duty cycle and large effective area, ground based high altitude EAS experiments play an important role in studying the high energy gamma ray bursts (GRBs). While shower mode technique provides the most sensitive way in searching for GRBs above 100GeV energy, the single-particle technique can extend the GRBs search energy down to GeV...
Anatoly Ivanov
(Shafer Institute for Cosmophysical Research & Aeronomy)
01/08/2015, 15:30
We are analysing temporal characteristics of signals from the wide field-of-view (WFOV) Cherenkov telescope detecting extensive air showers (EAS) of cosmic rays (CR) in coincidence with surface detectors of the Yakutsk array. Our aim is to reveal causal relationships between measured characteristics and physical properties of EAS.
Daisuke Ikeda
(Institute for Cosmic Ray Research, University of Tokyo)
01/08/2015, 15:30
We are carrying out an R&D project to search for radar echoes from cosmic ray induced extensive air showers. For the verification of the radar echo technique, we have used the electron beam as a pseudo air shower generated by the Electron Light Source (ELS). The radio receivers consist of two wide-band log-periodic antennas and digital receivers, and the transmitter consists of a Yagi antenna....
Laura Valore
(University of Naples / INFN Naples)
01/08/2015, 15:30
The Atmospheric Research for Climate and Astroparticle Detection (ARCADE) project aims to a better comprehension of the limits of applicability, systematics and possible enhancements of the typical techniques used for the measurement of the aerosol attenuation profiles of UV light in cosmic rays and gamma rays experiments. Aerosols are indeed the most variable component in the atmosphere on a...
Dr
Laura Valore
(University of Naples / INFN Naples)
01/08/2015, 15:30
The Cherenkov Telescope Array (CTA) is the next generation of ground-based very high energy gamma-ray instruments; the facility will be organized in two arrays, one for each hemisphere. The atmospheric calibration of the CTA telescopes is a critical task. The atmosphere affects the measured Cherenkov yield in several ways: the air-shower
development itself, the variation of the Cherenkov...
Dr
Alexey Bakaldin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe shosse, 115409 Moscow, Russia)
01/08/2015, 15:30
The present contribution is dedicated to the investigation of background conditions for cosmic ray ion ionization state measurements in MONICA experiment. The future experiment MONICA is aimed to study the cosmic ray ion fluxes from H till Ni in energy range 10-300 MeV/n. The experiment main scientific objective is the measurement of ion ionization state, as well as elemental, isotope...
Dorota Sobczynska
(University of Lodz)
01/08/2015, 15:30
A system of Imaging Air Cherenkov Telescopes (IACTs) can be triggered by hadronic events containing Cherenkov light from at most two electromagnetic subcascades, which are products of the single $\pi^0$ decay. The recorded images of those showers have a similar shape to the primary $\gamma$-ray events. Therefore, they are hardly reducible background for observations using IACTs.
In this...
Anatoly Petrukhin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
01/08/2015, 15:30
The large-scale coordinate-tracking detector TREK for registration of near-horizontal muon flux generated by ultrahigh energy primary particles is being developed in MEPhI. Detector is based on the multiwire drift chambers from the neutrino experiment at the IHEP U-70 accelerator, their key advantages are a large effective area (1.85 m2), good coordinate and angular resolution with a small...
Satyendra Thoudam
(Radboud University)
01/08/2015, 15:30
The LOFAR Radboud Air Shower Array (LORA) is an array of 20 plastic scintillation detectors installed in the center of the LOFAR radio telescope in the Netherlands to measure extensive air showers induced by cosmic rays in the Earth's atmosphere. The primary purpose of LORA is to trigger the read-out of the LOFAR radio antennas to record radio signals from air showers, and to assist the...
Prof.
Harm Moraal
(North-West University)
01/08/2015, 15:30
Ground-level enhancements (GLEs) of the intensity of cosmic rays are an inherent part of large cosmic-ray storms.
The GLE of 29 September 1989 was one of the largest of 71 solar energetic particle events observed by neutron monitors on Earth. It was smaller than the record-breaking GLE 5 of 23 February 1956, but by some measures it was larger than GLE 69 of 20 January 2005. It is also the...
Gudlaugur Johannesson
(Science Institute, University of Iceland)
01/08/2015, 15:30
A study of interstellar emissions from radio to high-energy gamma rays (> 100 MeV) arising from CR interactions with interstellar gas, radiation and magnetic fields is currently the best way to gain insight into the physics of CRs throughout the Milky Way. To properly utilize the high quality data of modern instruments such as the Fermi-LAT, a detailed model of these interstellar emissions is...
Mr
Petr Gololobov
(ShICRA of SB RAS)
01/08/2015, 15:30
We present the results of spectrum analysis of the event of ground level enhancement of solar cosmic rays on October 28, 2003 (GLE65) in the widest range of energies. The energy spectrum of cosmic rays is studied on the basis of direct measurements of solar particle fluxes aboard the ACE, GOES and WIND spacecraft, as well as by data recorded by the worldwide neutron monitor network. In the...
Charles Timmermans
(Dept. Exptl. High-Energy Physics-High Energy Physics Institute)
01/08/2015, 15:30
High-energy neutrino astronomy will probe the working of the most violent phenomena in the Universe. The GRAND (Giant Radio Array for Neutrino Detection) project consists of an array of 200 000 radio antennas deployed over a total area of 200 000 km2 in a mountainous site. The array aims at detecting high energy neutrinos (E>10^16 eV) via the measurement of air showers induced by the decay in...
Dr
Leonid Tkachev
(JINR, Dubna)
01/08/2015, 15:30
Mr
Mohammad Hussein
(University of Manitoba)
01/08/2015, 15:30
We explore the influence of magnetic turbulence on the transport of energetic particles, mainly cosmic rays, by using test-particle simulations. We compute parallel and perpendicular diffusion coefficients for two-component turbulence, isotropic turbulence, a model based on Goldreich-Sridhar scaling, noisy reduced magneto-hydrodynamic turbulence, and a noisy slab model. We have shown that for...
Hisanori Takamaru
(Chubu University)
01/08/2015, 15:30
To find a possible correlation between the muon / neutron counting rate and simultaneously registered solar activity, by using machine learning, we propose the semi-automatic forecasting algorithm for several physical process, e.g. Forbush decrease, GLE, and so on. These correlations have a complex form defined by the spatially and temporally ordered set of events at world-wide monitor...
Prof.
Marcelo Leigui de Oliveira
(UFABC)
01/08/2015, 15:30
MonRAt is a compact telescope designed to detect photons generated by ultra-high energy cosmic ray particles in the atmosphere. The telescope is composed of a 64-pixel multianode photomultiplier tube in the focus of a parabolic mirror. Ultraviolet-passing filters are positioned in front of the photocathode to select photons within the wavelength range of nitrogen fluorescence. The data...
Dr
Vladimir Ryabov
(P.N. Lebedev Physical Institute, RAS, Moscow, Russia)
01/08/2015, 15:30
The results of the test data collection run held at the new shower installation of the Tien Shan mountain cosmic ray station are discussed. At time, the system consists of $\sim$100 detector points built on the basis of plastic scintillator plates with sensitive area of 0.25 m$^2$ and 1 m$^2$. In the core region these detectors form two rather dense carpets with the 3 m$\times$4 m uniform...
Dr
Masaaki Hayashida
(Institute for Cosmic-Ray Research, University of Tokyo)
01/08/2015, 15:30
The Large Size Telescope (LST) of the Cherenkov Telescope Array (CTA) is designed to achieve a threshold energy of 20 GeV. The LST optics is composed of one parabolic primary mirror 23 m in diameter and 28 m focal length. The reflector dish is segmented in 198 hexagonal, 1.51 m flat to flat mirrors. The total effective reflective area, taking into account the shadow of the mechanical...
Atsushi Iyono
(Okayama University of Science)
01/08/2015, 15:30
Observation experiments of Cosmic rays have been carried out since 1996
in Okayama University of Science, the primary energy spectrum in energy
range of 10^16eV to 10^19.5eV has been obtained by using a mini array
consist of 8 plastic scintillation counters and an extensive air shower
(EAS) time structure since 2006. And, in order to improve the energy
resolution of the mini array...
Prof.
Anatoly Erlykin
(P.N.Lebedev Physical Institute)
01/08/2015, 15:30
The dependence of the cosmic ray intensity on Galactocentric distance is known to be much less rapid than that of the thought-to-be sources: supernova remnants. This is an old problem ('the radial gradient problem') which has led to a number of possible 'scenarios'. Here, we use recent data on the supernova remnant's radial distribution and correlate it with measured HII electron temperature...
Mrs
GRACE IHONGO
(UNIVERSITY OF ABERDEEN)
01/08/2015, 15:30
The relationship between galactic cosmic rays and solar wind is investigated using an extended time- dependent and anisotropic force field model, where galactic cosmic rays flux is found to be related to the solar wind speed through the local interstellar spectrum and a modulation parameter. Galactic cosmic ray flux calculated at 1au within the energy range (0.2 – 88)GeV using the model is...
Lev Timofeev
(SHICRA SB RAS)
01/08/2015, 15:30
This report presents an observation method of Cherenkov light from extensive air showers (EAS) generated by cosmic rays (CRs) above 1016 eV and preliminary observations. The interest in Cherenkov light differential detectors of EAS is caused by the possibility to measure the depth of cascade maximum, Xmax, and/or the shower age via angular and temporal distributions of the Cherenkov signal. In...
Dr
Alejandro Lara
(Instituto de Geofisica, UNAM)
01/08/2015, 15:30
We present preliminary images of the sun shadow from data collected by the High Altitude Water Cherenkov Observatory (HAWC) during 2013 and 2014. HAWC is an air shower array located in the central region of Mexico that observes TeV cosmic rays at a rate of about 10 kHz. The magnetic field of the solar corona is very difficult to measure directly. However indirect observations of the solar...
Vera Georgievna Sinitsyna
(P.N. Lebedev Physical Institute)
01/08/2015, 15:30
The investigation of VHE gamma-ray sources by any methods, including mirror Cherenkov telescopes, touches on the problem of the cosmic ray origin and, accordingly, the role of the Galaxy in their generation. The SHALON observations have yielded the results on Galactic supernova remnants (SNR) of different ages. Among them are: the shell-type SNRs Tycho's SNR (1572y), Cas A (1680y), IC 443 (age...
Alessandro Carosi
(INAF-ASDC)
01/08/2015, 15:30
The increasing number of Very High Energy (VHE) sources discovered by the current generation of Cherenkov telescopes made particularly relevant the creation of a dedicated source catalogs as well as the cross-correlation of VHE and lower energy bands data in a multi-wavelength framework. The "TeGeV Catalogue" hosted at the ASI Science Data Center (ASDC) is a catalogue of VHE sources observed...
Mr
Yoann Genolini
(LAPTh)
01/08/2015, 15:30
PAMELA and, more recently, AMS-02, are ushering us into a new era of greatly reduced statistical uncertainties in experimental measurements of cosmic ray fluxes. In particular, new determinations of traditional diagnostic tools such as the boron to carbon ratio (B/C) are expected to significantly reduce errors on cosmic-ray diffusion parameters, with important implications for astroparticle...
Ms
Jeongmin Park
(Kyunpook National University)
01/08/2015, 15:30
It is important to measure the cosmic ray spectrum to understand the origin, acceleration and propagation mechanisms of high-energy cosmic rays. The Cosmic Ray Energetics And Mass (CREAM) experiment will be launched in 2015 to the International Space Station (ISS) to measure cosmic ray elemental spectra up to energies beyond the reach of balloon instruments. The Top Counting Detector (TCD) and...
Prof.
RAJIV KUMAR
(GOVERNMENT PENCH VALLEY POST GRADUATE COLLEGE PARASIA)
01/08/2015, 15:30
ABSTRACT:
The purpose of this research paper is to develop efficient sites array of using CRAYFIS(Cosmic Rays Found in smart phone)which gives real time radiation weather map on temporal and spatial scales. It is suggested how a map can be prepared in terms of exact azimuth zenith and altitude angles so that the direction of the cosmic rays sources could be estimated.
Prof.
Juan A. Garzon
(LabCAF - Univ. Santiago de Compostela)
01/08/2015, 15:30
Cosmic rays, coming either from the Sun, our galaxy or other galaxies, are permanently arriving to the Earth after having been affected by the intergalactic magnetic fields, the solar activity and the terrestrial atmosphere, being a very valuable source of information of our surrounding Universe.
Since the last year, a new RPC-based tracking detector, TRAGALDABAS (acronym of "TRAsGo for...
Stanislav Stefanik
(Institute of Particle and Nuclear Physic, Charles University in Prague)
01/08/2015, 15:30
We report on an unidentified gamma-ray signal found in the region around the BL Lac object 1ES 0229+200.
It was recognized serendipitously in our analysis of 6.2 years of Fermi-LAT data at a distance less than $3^\circ$ away from the blazar.
The observed excess of counts manifests itself as an unexpected local maximum in the test statistic map.
Although several Fermi-LAT sources have been...
Dr
Andrzej Śmiałkowski
(University of Lodz)
01/08/2015, 15:30
Based on shower simulations we show that the electron distribution $ f(\theta,r,E;s) $, describing fully the fraction of electrons with energy $E$,at shower age $s$, at the distance from the axis $r$ and having angle $\theta$ is the same for any shower, independently of the primary energy or mass and shower fluctuations. We find an analytic description of this function
fitting it best in...
Yoshinori Sasai
(Nagoya University)
01/08/2015, 15:30
SciCRT (SciBar Cosmic Ray Telescope) is a new project to observe cosmic rays via a full active scintillator tracker. Our aim is to detect high energy solar neutrons produced by the interaction between accelerated ions and the solar atmosphere and to observe the anisotropy of galactic cosmic-ray muons. In the previous ICRC in Brazil, we reported that the detector has been installed at Mt....
Prof.
ANDRES SANDOVAL
(INSTITUTO DE FISICA UNAM)
01/08/2015, 15:30
The initial concept of the HAWC Observatory, an air shower array of 300 water Cherenkov detectors on the slope of Sierra Negra in Mexico, has been successfully carried out with the completion of construction in December 2014. The HAWC detector, located 4100 m above sea level, has begun continuous operation surveying the sky for cosmic rays and gamma rays between 100 GeV and 100 TeV. The...
Igor Yashin
(National Research Nuclear University MEPhI - Moscow),
Juan A. Garzon
(Univ.)
01/08/2015, 15:30
Cosmic Rays research is of great interest both because it improves our knowledge of how Cosmic Rays are produced and accelerated and because it provides a great deal of information about the interstellar and interplanetary media, the solar activity and the Earth’s surroundings.
In order to deepen our understanding of several phenomena related with the cosmic rays, two complementary...
Dr
Simona Toscano
(Vrije Universiteit Brussel (VUB); University of Geneva)
01/08/2015, 15:30
Imaging Atmospheric Cherenkov Telescopes (IACTs) are ground-based instruments devoted to the study of very high energy gamma-rays coming from space. The detection technique consists in observing images created by the Cherenkov light emitted when gamma rays, or more in general cosmic rays, propagate in the atmosphere. While in case of protons or gammas the images present a filled and more or...
Dr
Yury Balabin
(Polar geophysical institute)
01/08/2015, 15:30
Low energy gamma-rays background in the polar atmosphere (Apatity (67° N) and Barenzburg (78° N)) is studied. Continuous measurements of gamma-ray differential spectrum in Apatity and integral one in Barenzburg are conducted since 2009. There is a seasonal variation of gamma-ray flux falling down from upper hemisphere. The same variations in thermal neutron and low energy charged particle...
Ruben Lopez-Coto
(Institut de Fisica d'Altes Energies - IFAE)
01/08/2015, 15:30
In the last few years the Fermi-LAT instrument has detected GeV gamma-ray emission from several novae. Such GeV emission can be interpreted in terms of inverse Compton emission from electrons accelerated in the shock or in terms of emission from hadrons accelerated in the same conditions. The latter might reach much higher energies and could produce a second component in the gamma-ray spectrum...
Andrew Romero-Wolf
(Jet Propulsion Laboratory, California Institute of Techology),
Stephanie Wissel
(UCLA)
01/08/2015, 15:30
Recent comparison studies of cosmic ray arrival directions and active galactic nuclei have resulted in evidence for correlation with weak significance against an isotropic source distribution. In this paper we address the question of what sample size is needed to measure a highly statistical significant correlation to a parent source catalog. We compare several scenarios for the directional...
Stijn Buitink
(Vrije Universiteit Brussel (VUB))
01/08/2015, 15:30
The radio emission from air showers is used to accurately reconstruct the depth of the shower maximum (Xmax). We present a method based on using the full two-dimensional radiation profile as observed on the ground. While the density of shower particles reaching the ground is usually described with a 1D lateral distribution function, the intensity of the radio pulse is a complex function of...
Dr
Alexander Borisov
(P.N.Lebedev Physical Institute, RAS, Moscow, Russia)
01/08/2015, 15:30
The project of a new experiment is proposed in order to obtain direct data on the value of production cross section of charmed particles in interactions of cosmic ray hadrons on lead nuclei at energy $E \sim 75$ TeV in the forward kinematic cone and to determine a contribution of prompt muons to the overall flow of superhigh energy muons within EAS at mountain altitudes. The proposed...
Simona Murgia
(University of California, Irvine)
01/08/2015, 17:00
The center of the Milky Way is predicted to be the brightest region in the gamma-ray sky produced by dark matter annihilation or decay. In recent years, claims have been made of an excess consistent with a dark matter annihilation signal in the data collected by the Fermi Large Area Telescope towards the Galactic center. These results are intriguing, however the complexity involved in modeling...
Jörg Hörandel
(Ru Nijmegen/Nikhef)
01/08/2015, 17:30
With LOFAR we measure the properties of the radio emission of extensive air showers with high precision in the frequency range 30 to 240 MHz. This allows us to establish key features, such as the lateral density distribution of the radio signals, the shape of the shower front, and the polarization of the radio signal. We obtained the first quantitative measurements in the frequency range...
Richard Mewaldt
(Caltech)
01/08/2015, 18:00
Measurements with ACE, STEREO, and GOES show that the number of large solar energetic particle (SEP) events in solar cycle 24 is reduced by a factor of ~2 compared to this point of cycle 23, while the fluences of >10 MeV/nuc ions from H to Fe are reduced by factors ranging from ~4 to ~10. We investigate the origin of these cycle-to-cycle differences by evaluating possible factors that...
389.
Solar Energetic Particles and Solar Events - Lessons Learned from Multi-Spacecraft Observations
Christina Cohen
(Caltech)
03/08/2015, 09:00
Never before has the heliosphere and the Sun been so carefully monitored by so many spacecraft; near 1 AU at multiple longitudes and at other radial distances. The instrumentation on these spacecraft are continually observing solar activity and measuring the characteristics of solar energetic particle (SEP) events, providing a wealth of information on the acceleration and transport of SEPs. ...
Elizabeth Hays
(NASA GSFC)
03/08/2015, 09:45
Gamma-ray astronomy reveals the sites and mechanisms of powerful astrophysical accelerators and tests the limits of our understanding of matter and energy in the Universe. Current instruments, both in space and on the ground, are deepening the view of the gamma-ray sky, broadening spectral coverage, and capturing variability and transient activity in a rich variety of astrophysical objects....
Maike Kunnas
(University of Hamburg)
03/08/2015, 11:00
For observation of extensive air showers from gamma rays and cosmic rays, shower front sampling arrays (non-imaging technique or timing-arrays) provide good core position, energy and angular resolution while covering a large area and posessing a wide field of view, yielding good sensitivity at the highest energies. However, the gamma-hadron separation power of this method is only poor compared...
81.
Filament Eruptions Outside of Active Regions as Sources of Large Solar Energetic Particle Events
Stephen Kahler
(Air Force Research Laboratory)
03/08/2015, 11:00
Gradual solar energetic (E > 10 MeV) particle (SEP) events are produced in shocks driven by fast CMEs, which are nearly always spatially associated with ARs. Several cases of SEP events associated with CMEs originating in large filament eruptions (FEs) from outside ARs have previously been known, but four more such cases from solar cycles 23 and 24 have been described by Gopalswamy et...
Dr
Richard Dallier
(SUBATECH - Ecole des Mines de Nantes - CNRS/IN2P3 - Université de Nantes)
03/08/2015, 11:00
Since 2003, the Nançay Radio Observatory hosts the CODALEMA experiment, dedicated to the radio detection of cosmic ray induced extensive air showers. After several instrumental upgrades, CODALEMA is now composed of:
- 57 self-triggering radio detection stations working in the 20-250 MHz band, spread over 1 km$^2$;
- an array of 13 scintillators acting as a particle detector;
- a compact...
Dr
Barbara Patricelli
(University of Pisa, INFN Pisa and Astronomy Institute of UNAM)
03/08/2015, 11:00
The blazar Mrk 421 is one of the closest, brightest and fastest varying source in the extragalactic X-ray/TeV sky. In the last years, many multiwavelength campaigns have been carried out to study the correlation between the VHE $\gamma$-ray and X-ray fluxes of this source and, although the activity in these two energy ranges seems to be correlated in many observations, no conclusive results...
Mr
Thomas Murach
(Humboldt-Universität zu Berlin)
03/08/2015, 11:15
The H.E.S.S. experiment entered its second phase with the addition of a new, large telescope called CT5 that has been added to the centre of the existing array of four smaller telescopes. Because of its larger mirror area the new telescope is able to detect fainter air showers, thereby lowering the energy threshold of the array from O(100 GeV) down to a few tens of GeV. Due to the power law...
Joaquim Palacio
(Institut de Física d'Altes Energies)
03/08/2015, 11:15
We present the results on Dark Matter searches from the Perseus galaxy cluster observations with the MAGIC Telescopes. MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes located in the Canary island of la Palma, Spain. Galaxy clusters are the largest known gravitationally bound structures in the Universe, with masses of ~10^15 Solar Masses. There is strong evidence that galaxy...
Dr
Andreas Klassen
(University of Kiel)
03/08/2015, 11:15
Solar electron spike events are a special subclass of near-relativistic electron events characterized by their short duration, symmetric time profile and their strongly anisotropic pitch angle distribution.
All previous studied spike events until now were observed by a single spacecraft only.
We present for the first time measurements of an electron spike event that was observed...
Alessandro Carosi
(INAF-ASDC)
03/08/2015, 11:15
Gamma-ray burst (GRBs) are primary targets for all modern IACT telescope. The MAGIC collaboration has identified the detection of GRBs in the VHE regime as one of its multi-year key observational programs (KOP). However, the transient and unpredictable nature of GRBs makes pointing and rapid follow-up observations to observe the prompt emission phase difficult for large ground-based Cherenkov...
Mr
Christian Glaser
(RWTH Aachen University)
03/08/2015, 11:15
At the Auger Engineering Radio Array (AERA) of the Pierre Auger Observatory, we have developed a new method to measure the total amount of energy that gets transferred from the primary cosmic ray into radio emission. We find that this radiation energy is itself an estimator of the cosmic ray energy. It scales quadratically with the cosmic-ray energy, as expected for coherent emission. We...
Anna Nelles
(Radboud University Nijmegen)
03/08/2015, 11:30
The international LOFAR radio telescope has been used now for four years to detect air showers. Its high antenna density has allowed us to measure the subtle
features of the radio emission of air showers. Together with air shower simulations, these data have been used to model the detected signals. The not rotational symmetric footprint is described by an analytical function with as few as...
Elisabetta Bissaldi
(INFN Bari)
03/08/2015, 11:30
After almost 7 years of science operation, the Fermi mission has brought great advances in the study of GRBs. Over 1500 gamma-ray bursts (GRBs) have been detected by the Gamma-ray Burst Monitor (GBM), and more than 100 of these are also detected by the Fermi Large Area Telescope (LAT) above 30 MeV.
We will give an overview of these observations, presenting the common properties in the GRB...
Dr
Nina Dresing
(IEAP, University of Kiel, Germany)
03/08/2015, 11:30
The Solar Electron and Proton Telescope (SEPT) carried on board both of the STEREO spacecraft provides four viewing directions to measure energetic electron and ion anisotropies. Two sectors cover the direction of the nominal magnetic field spiral in the ecliptic, with one looking towards the Sun and the other away from the Sun (Anti-Sun). The other two telescopes view towards north and south,...
Koji Noda
(Max-Planck-Institute for Physics)
03/08/2015, 11:45
The blazar Mrk501 is among the brightest X-ray and TeV sources in the sky, and among the few sources whose (radio to VHE gamma-rays) Spectral Energy Distributions can be characterized by current instruments by means of relatively short observations (minutes to hours). In 2013, we organized an extensive multi-instrument campaign involving the participation of Fermi LAT, MAGIC, VERITAS, F-GAMMA,...
Richard Leske
(California Institute of Technology)
03/08/2015, 11:45
Solar energetic particle (SEP) pitch angle distributions are shaped by the competing effects of magnetic focusing and scattering as the particles travel through interplanetary space. Therefore, measurements of SEP anisotropies provide insight into particle transport and can probe interplanetary conditions at remote locations from the observer. The Low Energy Telescopes (LETs) onboard the...
Gia Trinh
(KVI-CART, University of Groningen, The Netherlands)
03/08/2015, 11:45
Energetic cosmic rays impinging on the atmosphere create a particle avalanche called an extensive air shower. In the leading plasma of this shower electric currents are induced that generate radio waves which have been detected with LOFAR, a large array of simple antennas primarily developed for radio-astronomical observations.
LOFAR has observed air showers under fair-weather conditions...
Prof.
Philip Von Doetinchem
(University of Hawaii at Manoa)
03/08/2015, 11:45
The precise measurement of cosmic ray antiparticles serves as important means for identifying the nature of dark matter. Recent years showed that identifying the nature of dark matter with cosmic ray positrons and higher energy antiprotons is difficult, and has lead to a significantly increased interest in cosmic ray antideuteron searches. Antideuterons may also be generated in dark matter...
M. Wiedenbeck
(JPL/Caltech)
03/08/2015, 12:00
Impulsive solar energetic particle (ISEP) events are understood to involve particle acceleration in relatively compact regions of the solar corona where reconnection causes the release of magnetic energy and produces both turbulence and larger scale motions that can interact with and accelerate charged particles. In many cases the longitudinal spread of ISEPs observed at 1 AU is relatively...
Adrian Biland
(Eidgenossische Technische Hochschule Zurich (ETH))
03/08/2015, 12:00
The First G-APD Cherenkov Telescope (FACT) is pioneering the usage of
solid state photosensors (G-APD, also known as SiPM). The 1440 pixel
camera is installed in a 10m$^2$ refurbished HEGRA telescope on
the Canary Island La Palma.
Physics data-taking with FACT started in October 2011, few hours after
installation of the camera. Since Summer 2012, FACT is operated remotely
without the...
Dirk Lennarz
(Georgia Tech)
03/08/2015, 12:00
We will present the first results of HAWC in searching for VHE gamma-ray emission from GRBs reported by Fermi, Swift and other satellite. The HAWC gamma-ray observatory is operating in central Mexico at an altitude of 4,100 m a.s.l. With an instantaneous field of view of approximately 2 sr and over 95% duty cycle (up time fraction), HAWC is an ideal detector to perform ground based gamma-ray...
Arthur Corstanje
(Radboud University Nijmegen)
03/08/2015, 12:00
The LOFAR radio telescope located in the north of the Netherlands offers a high density of omnidirectional radio antennas. In its central part, it consists of over 1100 dual-polarized antennas in an area of 12 km^2, of which nearly 300 are placed in the central ring of 320 m diameter.
LOFAR is therefore well suited for detailed studies of the radio signal from air showers, and has been...
John Carr
(CPPM/IN2P3/CNRS)
03/08/2015, 12:00
The existence of dark matter (DM) as the dominant contribution to the gravitational mass of the Universe is by now well established but the corpuscular nature of DM is at present unknown. Multiple hypotheses endure as to the character of DM and for the most popular DM models the CTA has a unique chance of discovery.
The principal target for DM searches with CTA is the Galactic Centre (GC)...
162.
4.5-year simultaneous multi-wavelength observation of Mrk 421 in ARGO-YBJ and Fermi overlap era
Silvia Vernetto
(Istituto Nazionale di Astrofisica)
03/08/2015, 12:15
As one of the most active blazars, Mrk421 is an excellent candidate for the study of the physical processes within the jets of AGN. Here we report on the extensive multi-wavelength observations of Mrk 421 over 4.5 years, from 2008 August to 2013 February. This source was simultaneously monitored by several experiments at different wavelengths: the ARGO-YBJ detector at gamma-ray energies above...
Brenda Dingus
(Los Alamos National Lab)
03/08/2015, 12:15
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field-of-view observatory sensitive to 100 GeV – 100 TeV gamma-rays and cosmic-rays. The HAWC observatory is also sensitive to diverse indirect searches for dark matter annihilation, including annihilation from extended dark matter sources, the diffuse gamma-ray emission from dark matter annihilation, and gamma-ray...
Prof.
Wolfgang Dröge
(Julius-Maximilians Universität Würzburg)
03/08/2015, 12:15
During August 2010 a series of solar particle events was observed by the two STEREO spacecraft as well as by near-Earth spacecraft. The events, occuring at the 7th, 14th and 18th of August, were originating from active regions 11093 and 11099. We combine in-situ and remote-sensing observations with predictions from our model of threedimensional anisotropic particle propagation in order to...
Julian Sitarek
(University of Łódź)
03/08/2015, 12:15
MAGIC is a system of two Imaging Atmospheric Cherenkov Telescopes
located in the Canary island of La Palma, Spain. During summer 2011
and 2012 it underwent a major upgrade. The main subsystems upgraded
were the MAGIC-I camera and its trigger system and the readout system
of both telescopes. We use observations of the Crab Nebula taken at
low and medium zenith angles to assess the key...
Mr
Armando di Matteo
(INFN and University of L'Aquila)
03/08/2015, 14:00
We present a combined fit of both flux and composition of ultra-high energy cosmic rays as measured by the Pierre Auger Observatory. The fit has been performed for energies above $5{\times}10^{18}$ eV, the region of the all-particle spectrum above the so-called ``ankle'' feature. A simple astrophysical model has been adopted, consisting of identical sources, injecting nuclei with a rigidity...
1091.
Extension of the measurement of the proton-air cross section with the Pierre Auger Observatory
Dr
Ralf Matthias Ulrich
(KIT - Karlsruhe Institute of Technology (DE))
03/08/2015, 14:00
With hybrid data of the Pierre Auger Observatory it is possible to measure the cross section of proton-air collisions at energies far beyond the reach of the LHC. Since the first measurement by the Pierre Auger Collaboration the event statistics has increased significantly. The proton-air cross section is now estimated in the two energy intervals in $\lg(E/\mathrm{eV})$ from 17.8 to 18.0 and...
Javier Barrios Martí
(IFIC - CSIC)
03/08/2015, 14:00
A search for cosmic neutrino point-like sources using the ANTARES and IceCube neutrino telescopes over the Southern Hemisphere is presented. The ANTARES data was collected between January 2007 and December 2012, whereas the IceCube data ranges
from April 2008 to May 2011. Clusters of muon neutrinos over the diffusely distributed background have been looked for by means of an unbinned maximum...
Prof.
Harm Moraal
(North-West University, South Africa)
03/08/2015, 14:00
Seventy-one ground-level enhancements (GLEs) in the counting rates of cosmic-ray detectors, due to outbursts of solar energetic particles, have been observed since 1942.
It is well-known that these events are associated with solar flares and coronal mass ejections (CMEs), and that they originate primarily from western longitudes on the surface of the sun. In addition, studies of the time...
Dr
Rasha Abbasi
(University of Utah)
03/08/2015, 14:15
In this work we report on the measurement of the proton-air inelastic cross section $\sigma^{\rm inel}_{\rm p-air}$ using data collected by the Telescope Array (TA) detector. Based on the measurement of $\sigma^{\rm inel}_{\rm p-air}$, the proton-proton cross section $\sigma_{\rm p-p}$ is subsequently inferred using the Glauber Formalism and the QCD-inspired fit of Block, Halzen and Stanev, at...
Mr
Zachary Zundel
(University of Utah)
03/08/2015, 14:15
Authors: Z. Zundel, for the Telescope Array Collaboration
Abstract:
The TA Collaboration has completed construction of a low-energy extension to its Middle Drum telescope station. Ten new telescopes were added observing 31-59 degrees in elevation above the original telescopes. A graded array of scintillators with spacing 400-600-1200m is being installed in in the space in front of the...
Dr
Pierre-Simon MANGEARD
(National Astronomical Research Institute of Thailand, Mahidol University)
03/08/2015, 14:15
Neutron monitors (NMs) are large ground-based instruments for precise time tracking of the variations in the Galactic cosmic ray (GCR) flux at the GeV-range. NMs count the secondary particles (mostly neutrons) issued from the interaction of the cosmic rays in the Earth's atmosphere. The sensitivity to GCR variations depends on the geomagnetic cutoff at the location of measurement as well as on...
Teresa Montaruli
(Universite de Geneve (CH))
03/08/2015, 14:15
The small size telescopes (SSTs), spread over an area of several square km, dominate the CTA sensitivity in the photon energy range from a few TeV to over 100 TeV, enabling for the first time detailed exploration of the very high energy gamma-ray sky. The proposed telescopes are innovative designs providing a wide field of view. Two of them, ASTRI and GCT, are based on dual mirror...
Takeshi Okuda
(Ritsumeikan University)
03/08/2015, 14:30
The Telescope Array (TA) Surface particle Detector (TASD) has observed short time bursts of air-shower like events. Correlations were found between these burst events and lightning data. We report on the observed bursts of air-shower like events and their correlation with lightning.
Dr
Laura Collica
(INFN Torino)
03/08/2015, 14:30
The muon content of extensive air showers is an observable sensitive to the primary composition and to the hadronic interaction properties. We present here different methods which allow us to estimate the muon number at the ground level and the muon production depth by exploiting the measurement of the longitudinal, lateral and temporal distribution of particles in air showers recorded at the...
Helena Kruger
(North-West University, Potchefstroom)
03/08/2015, 14:30
Two small neutron monitors were built in 2002 to intercalibrate the approximately 40 stationary neutron monitors around the world, in order to study the modulation of cosmic rays derived from the resulting differential response functions. Due to electronic development during the past decade, the electronics heads were redesigned in 2011 and due to cheaper and more efficient counter tubes, the...
Dr
Markus Garczarczyk
(DESY)
03/08/2015, 14:35
CTA, the Cherenkov Telescope Array, is an international project for the next generation ground-based observatory for gamma-ray astronomy in the energy range from 20 GeV to 300 TeV. The sensitivity in the core energy range will be dominated by up to 40 Medium-Sized Telescopes (MSTs). The MSTs, of Davies-Cotton type with a 12m diameter reflector are currently in the prototype phase. A full-size...
Alexander Mishev
(INRNE-BAS)
03/08/2015, 14:45
At present the world wide neutron monitor (NM) network provides continuous information about cosmic ray (CR) variations in the vicinity of Earth. In addition, analyses of ground level enhancements (GLEs) are also based on the NM data records. It is important to have precise information for the NM yield function for primary CRs, which is crucial for an analysis of GLEs. Here we present a newly...
Colin Baus
(KIT - Karlsruhe Institute of Technology (DE))
03/08/2015, 14:45
The complexity of the development of extensive air showers makes it extremely difficult to study the nature and the sources of cosmic rays at ultra-high energies. The largest uncertainties are related to the modelling of hadronic interactions in the air shower cascade. The sensitivity to the theoretical description is maximised when measurements in the forward phase-space at accelerators are...
Dr
Tareq AbuZayyad
(University of Utah)
03/08/2015, 14:45
We report on a cosmic ray energy spectrum measurement by the Telescope Array Low-Energy extension (TALE) fluorescence detector (FD). The TALE FD is an air fluorescence detector which is also sensitive to the Cerenkov light produced by shower particles. Low energy cosmic rays, in the PeV energy range, are detectable by TALE as "Cerenkov Events". Using these events, we measure the energy...
Carla Bleve
(Università del Salento)
03/08/2015, 14:45
Ultra-high energy neutrinos and photons, with energies above 1 EeV and 10 EeV respectively,
can be detected with the Surface Detector array (SD) of the Pierre Auger Observatory.
Downward-going neutrinos of all flavours interacting in the atmosphere at zenith angles larger than 60 degrees,
as well as upward-going tau neutrinos (''Earth-skimming") can be identified through the broad...
Masahiro Teshima
(Max-Planck-Institute)
03/08/2015, 14:55
The Cherenkov Telescope Array (CTA) observatory, will be deployed over two sites in the northern and southern hemispheres. Both sites will be equipped with four Large Size Telescopes (LSTs), which are crucial to achieve the science goals of CTA in the 20-200 GeV energy range. Each LST is equipped with a primary tessellated mirror dish of 23 m diameter, supported by a structure made mainly of...
Mr
Stefan Coenders
(Technische Universität München, Physik-Department)
03/08/2015, 15:00
The emphasis on point source searches for astrophysical neutrinos has recently been strengthened by the unambiguous detection of high-energy astrophysical neutrinos by IceCube. So far the limited statistics and angular resolution of the relevant analyses do not resolve more than an isotropic emission of astrophysical neutrinos. We present the results of searches for point source neutrino...
Juan Carlos Arteaga-Velazquez
(Universidad Michoacana)
03/08/2015, 15:00
Preliminary analyses of air-shower data from the KASCADE-Grande observatory have pointed out a possible discrepancy between the predicted and the measured values of the attenuation length of muons
with energy threshold of 230 MeV at ground level in air showers. In particular, the analyses suggest that the measured muon attenuation length, as reconstructed with the constant intensity cut...
Igor Petrov
(Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy)
03/08/2015, 15:00
The experimental data on the energy spectrum cosmic rays, obtained from Small Cherenkov Array in Yakutsk on the measurement of Cherenkov radiation in showers with energy 10^15 – 10^18 eV are discussed. The data were obtained by means of continuous array operation since 1994. Found that the spectrum of the all particle in this energy region has a complex shape and cannot be described by a...
Prof.
Lev Dorman
(IZMIRAN (Russia) and Tel Aviv University (Israel))
03/08/2015, 15:00
Gvozdevsky1 B., Dorman2,3 L., Abunin2 A., Preobrazhensky2 M., Gushchina2 R., Belov2 A., Eroshenko2 E., Dai3 U., Pustil’nik3 L., Yanke2 V.
1- Polar Geophysical Institute, 184209, Firsmana str., 14, Apatity, Russia
2- IZMIRAN, Kalushskoe ave., 4, Troitsk, Moscow, 142190, Russia
3. Israel Cosmic Ray and Space Weather Center with Emilio Segre’ Observatory on Mt. Hermon, affiliated to Tel Aviv...
Prof.
Dawn Williams
(University of Alabama)
03/08/2015, 15:15
The IceCube Neutrino Observatory has reported a diffuse flux of TeV-PeV astrophysical neutrinos in three years of data. The observation of tau neutrinos in the astrophysical neutrino signal is of great interest in determining the nature of astrophysical neutrino oscillations. Tau neutrinos become distinguishable from other flavors in IceCube at energies above a few hundred TeV, when the...
Prof.
Huihai He
(Institute of High Energy Physics, CAS)
03/08/2015, 15:15
The Large High Altitude Air Shower Observatory (LHAA-SO) project plans to build a hybrid extensive air shower (EAS) array with an area of 1 km^2 at an altitude of 4410 m asl in Sichuan province, China, aiming for very high energy gamma ray astronomy and cosmic ray physics around the spectrum knees. With a sensitivity of 1% Crab unit, the LHAA- SO will survey the entire northern sky for gamma...
Prof.
Ding Chen
(National Astronomical Observatories, CAS)
03/08/2015, 15:15
A hybrid experiment has been started by the Tibet ASγcollaboration in Tibet, China, since May 2009. It consists of a burst-detector-grid (YAC : Yangbajing Air- shower Core-array) and the Tibet-III AS array. The Tibet-III array is used to measure the total energy and the arrival direction of air-showers, and YAC-I can observe high-energy shower particles in air-shower cores. By comparing the MC...
Paul Evenson
(University of Delaware)
03/08/2015, 15:15
Secular variation of the Earth's geomagnetic fields is well known to change the cutoff rigidity, and thereby the count rate of low latitude neutron monitors. Such changes are generally assumed to be irrelevant to so called atmosphere limited neutron monitors at high latitudes. We have documented a secular change in the count rate of the neutron monitor at Amundsen – Scott Station, located at...
Andreas Haungs
(Karlsruhe Institute of Technology)
03/08/2015, 15:15
At a few PeV the energy spectrum of high-energy cosmic rays exhibits a sudden change of the spectral index, usually known as the knee of the spectrum. The origin of this knee is seen as key for the understanding of galactic cosmic rays. KASCADE-Grande investigated with a multi-detector installation (including LOPES for measuring the radio emission of air showers) the elemental composition of...
Aongus O'Murchadha
(Université Libre de Bruxelles), Dr
Carl Gilbert Pfendner
(Ohio State University (USA))
03/08/2015, 15:30
The Askaryan Radio Array (ARA) is an ultra-high energy (>100 PeV) cosmic neutrino detector which is in phased construction near the South Pole. ARA searches for radio Cherenkov-like emission from particle cascades induced by neutrino interactions in the ice using radio frequency antennas (~150-800 MHz) deployed at a design depth of 200m in the Antarctic ice. A prototype ARA Testbed station was...
Dr
Natalia Barbashina
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
03/08/2015, 15:30
Investigations of Forbush decreases in a muon flux have certain peculiarities. First, muons are sensitive to the higher energies (relative to neutrons) of primary cosmic rays (PCRs), opening up new possibilities for studying the heliospheric perturbations responsible for the modulation of high energy PCRs. Second, muons save the direction of the primary particle motion, allowing to obtain the...
Ms
Soheila Abdollahi
(Alborz Observatory, Sharif University of Technology)
03/08/2015, 15:30
Alborz-I as the first phase of the Alborz Observatory Array supposed to study the cosmic ray spectrum around the knee at Sharif University of Technology, Tehran (1200 m a.s.l). In this paper theoretical results obtained from study of the design features, performance, technical characteristic and angular resolution of the Alborz-I consists of 20 scintillator detectors are described. Using a...
Dr
Hans Peter Dembinski
(Bartol Institute, Dept of Physics and Astronomy, University of Delaware),
Javier Gonzalez
(Bartol Research Institute, Univ Delaware)
03/08/2015, 15:30
IceTop, the surface component of the IceCube detector, has been used to measure the energy spectrum of cosmic rays from 1.6 PeV to 1.3 EeV. It was recently shown that the recorded data can also be used to measure the average density of GeV muons in the shower front at large radial distances (> 300 m) from the shower axis. The analysis is based on fitting the single muon peak in charge...
Dr
Xi Luo
(North-West University, Potchefstroom, South Africa)
03/08/2015, 15:45
We have constructed a 3-D numerical model for studying Forbush Decreases (FDs) in the heliosphere. It incorporates 3-D propagation barriers, with enhanced cooling inside, into a time-dependent Parker type modulation model using a Stochastic Differential Equation (SDE) approach. This numerical model simultaneously takes into account the effect of solar wind convection, regular drift plus...
Geraldina Golup
(Centro Atomico Bariloche)
03/08/2015, 15:45
We present the results of three searches for correlations between UHECR events measured by Telescope Array and the Pierre Auger Observatory and high-energy neutrino candidate events from IceCube. Two cross-correlation analyses of UHECRs are done: one with 28 cascades from the IceCube high-energy starting events sample and the other one with 12 high-energy tracks. The angular separation between...
Sergio Dasso
(IAFE - CONICET - UBA)
03/08/2015, 15:45
The Latin American Giant Observatory (LAGO) is an extended cosmic ray observatory composed by a network of water-Cherenkov detectors (WCDs) spanning over different sites located at significantly different altitudes (from sea level up to more than $5000$\,m a.s.l.) and latitudes across Latin America, covering a huge range of geomagnetic rigidity cut-offs and atmospheric absorption/reaction...
Dr
Akira Okumura
(Solar-Terrestrial Environment Laboratory, Nagoya University)
03/08/2015, 15:45
We have developed a non-sequential ray-tracing simulation library, ROot-BAsed Simulator for ray Tracing (ROBAST), which is aimed to be widely used in optical simulations of cosmic-ray and gamma-ray telescopes. The library is written in C++, and fully utilizes the geometry library of the ROOT analysis framework. In spite of the importance of optics simulations in cosmic-ray experiments, there...
Heino Falcke
(Radboud University Nijmegen/ASTRON/MPIfR Bonn)
03/08/2015, 20:00
**[BlackHoleCam: The first image of a super massive black hole][1].**
----------
Gravity is successfully described by Einstein's theory of general relativity.
One of its most fundamental predictions are black holes.
Their defining, but as yet unproven, feature is the event horizon -
the point of no return where not even light can escape the grip of gravity.
Supermassive black...
Enectali Figueroa-Feliciano
(Northwestern University)
04/08/2015, 09:00
Figuring out the nature of dark matter is one of the greatest questions in physics today. While we see its effect in a wide variety of astrophysical and cosmological measurements, a description of its composition and properties has remained elusive. The hunt for dark matter is taking place in three different and complimentary fronts: looking for the end products of potential dark matter...
Damiano Caprioli
(Princeton University)
04/08/2015, 09:45
The origin of cosmic rays (CRs) has puzzled scientists since the pioneering discovery by Victor Hess in 1912. In the last decade, however, modern supercomputers have opened a new window on the processes regulating astrophysical collisionless plasmas, allowing the study of CR acceleration via first-principles kinetic simulations; at the same time, new generations of X-ray and gamma-ray...
Hugo Ayala
(Michigan Technological University)
04/08/2015, 11:00
The Fermi Bubbles, which comprise two large and homogeneous regions of spectrally hard gamma-ray emission extending up to 55º above and below the Galactic Center, were first noticed in GeV gamma-ray data from the Fermi Telescope in 2010. The mechanism or mechanisms which produce the observed hard spectrum are not understood. Although both hadronic and leptonic models can describe the spectrum...
Mr
Matteo Martucci
(Laboratori Nazionali di Frascati)
04/08/2015, 11:00
The great challenge in constraining scenarios for solar energetic particle (SEP) acceleration is due to the fact that the signatures of acceleration itself are heavily modified by transport within interplanetary space. During transport, SEPs are subject to pitch angle scattering by the turbulent magnetic field, adiabatic focusing, or reflections magnetic structures. Ground Level Enhancements...
Alexei Struminsky
(Space Research Institute)
04/08/2015, 11:00
We reconstruct an ultimate spectrum of solar/stellar cosmic rays (SCR) in a given point in the
heliosphere (stellar sphere) basing on maximal value of magnetic field strenght in active region and its characteristic
linear dimension. An accelerator of given dimensions and magnetic field strengh may accelarate to a finite energy for
a given time (a maximal energy of SCR). We will use spectrum...
Roland Crocker
(Australian National University)
04/08/2015, 11:15
Analysis of γ-ray data provided by the Fermi-LAT has revealed giant, hard-spectrum γ-ray lobes emanating from the Galactic nucleus (and extending to |b| ∼ 50°). These `Fermi Bubbles' have hard-spectrum, total-intensity microwave (∼20-40 GHz) counterparts in their lower reaches (the microwave `Haze' extending to |b| ∼ 35°) and, on large scales, are subsumed by steep spectrum, polarised radio...
Simon Michael Kunz
(KIT - Karlsruhe Institute of Technology (DE))
04/08/2015, 11:15
Transport models for galactic cosmic rays depend on a large number of
parameters which are poorly known and can be constrained only through
derived quantities by comparison with the observed spectra of various
cosmic ray species. Numerical models as implemented in the DRAGON or
GALPROP code describe a multitude of observations. However, degenerate
solutions limit the predictive power of...
Xin Wu
(Universite de Geneve (CH))
04/08/2015, 11:15
PANGU (the PAir-productioN Gamma-ray Unit) is a small astrophysics mission with wide field of view optimized for spectro-imaging, timing and polarisation studies. It will map the gamma-ray sky from 10 MeV to a few GeV with unprecedented spatial resolution. This window on the Universe is unique to detect photons emitted directly by relativistic particles, via the decay of neutral pions, or the...
Prof.
H.S. Ahluwalia
(University of New Mexico)
04/08/2015, 11:15
Smooth sunspot numbers (SSNs) for cycle 24 increased since onset in December 2008, developing a shoulder in 2012, a plateau in 2013 and a peak in October 2014 followed by a decay phase well after the solar polar magnetic fields reversed; polar field reversals usually occur near SSN maxima but the polarity in northern hemisphere reversed in June 2012 and again in February 2014 while that in...
Cristina Consolandi
(University of Hawai'i at Manoa (US))
04/08/2015, 11:30
The Alpha Magnetic Spectrometer (AMS-02) is a high-energy particle detector designed to perform fundamental physics research in space. It was installed on the International Space Station (ISS) on May 19, 2011. During the first 30 months of operations, AMS-02 collected 41 billion events
of primary cosmic rays between 1 GV and 1.8 TV.
In this work, we analyze the detailed time variation of...
Shotaro Komura
(Kyoto University)
04/08/2015, 11:30
The observation of MeV celestial gamma rays provide us much information about various high energy phenomena. However, the sufficient observation has not yet been achieved due to the large radiation backgrounds and unclearness of Compton gamma-ray image.
To advance the MeV gamma-ray astronomy, we have developed an Electron-Tracking Compton Camera (ETCC) which consists of a gaseous Time...
Iris Gebauer
(KIT - Karlsruhe Institute of Technology (DE))
04/08/2015, 11:30
The Alpha Magnetic Spectrometer (AMS-02) is a state-of-the-art particle
detector designed to operate as an external module on the International
Space Station (ISS). In this unique space environment cosmic particles
can be measured with high precision over an energy range from GeV up to
a few TeV. In 2014, the AMS collaboration provided precise measurements of the electron and positron...
Dr
Gwenael Giacinti
(Oxford U.)
04/08/2015, 11:30
We show that the cosmic ray (CR) knee can be entirely explained by energy-dependent CR
leakage from the Milky Way, with an excellent fit to all existing data. We test this hypothesis
calculating the trajectories of individual CRs in the Galactic magnetic field. We find that the CR
escape time t(E) exhibits a knee-like structure around E/Z = few × PeV for small coherence
lengths and...
Wim De Boer
(KIT - Karlsruhe Institute of Technology (DE))
04/08/2015, 11:30
The Fermi-LAT 6-year data provide a detailed map of the diffuse gamma-ray sky for which the main contributions originate from neutral pion decay, bremsstrahlung and inverse Compton scattering. The energy spectra of these contributions are
known from laboratory experiments and can be used as templates to fit the energy spectra of the Fermi data in each direction, thus providing the...
Dr
Dario Grasso
(INFN, Pisa)
04/08/2015, 11:45
As recently shown, Fermi-LAT measurements of the diffuse gamma-ray emission of the Galaxy favor the presence of a smooth softening of the primary cosmic-ray spectrum with the Galactocentric distance. This result can be interpreted in terms of a spatial dependent rigidity scaling of the diffusion coefficient. The DRAGON code has been used to build a model which implements such feature...
C. Michelle Hui
(Michigan Technological University)
04/08/2015, 11:45
The majority of Galactic TeV gamma-ray sources are pulsar wind nebulae (PWNe) and supernova remnants (SNRs), and the most common association for unidentified sources is PWN. Many of these sources were discovered in TeV by imaging air Cherenkov telescopes using overlapping pointed observations over sections of the Galactic plane. The HAWC observatory is a survey type instrument in the Northern...
Iris Gebauer
(KIT - Karlsruhe Institute of Technology (DE))
04/08/2015, 11:45
The Alpha Magnetic Spectrometer (AMS-02) is a state-of-the-art particle
detector designed to operate as an external module on the International
Space Station (ISS). In the absence of atmospheric disturbance, cosmic
ray fluxes between 0.5 GeV and a few TeV can be measured with high
precision.
In 2014, the AMS collaboration provided precise measurements of the electron
and positron...
Dr
Merlin Kole
(University of Geneva)
04/08/2015, 11:45
Polarimetry is a powerful tool to study the emission processes involved in high energy astrophysical events such as Gamma-Ray Bursts (GRBs). Despite the wealth of information which can be extracted from polarimetry measurements few have been performed successfully thus far. POLAR is a novel space-borne Compton polarimeter foreseen to be launched in 2016 on the Chinese spacelab TG-2. The...
Davide Grandi
(Universita & INFN, Milano-Bicocca (IT))
04/08/2015, 11:45
Our backtracing code (Geomagsphere), for Cosmic Rays trajectory
reconstruction in the Earth Magnetosphere, has been developed using the
latest models of Internal (IGRF-11) and External (Tsyganenko 1996 and 2005)
field components. Backtracing technique was applied to AMS-02 data to
separate Primary Cosmic Rays Particles from Secondary particles. We tested
the accuracy of Magnetic Field...
sarah recchia
(Gran Sasso Science Institute)
04/08/2015, 12:00
The transport of cosmic rays (CRs) in the Galaxy is known to be
affected by the presence of winds launched from the Galactic disc.
When these winds are pre-assigned, it is easy to check that the
effects on transport are limited to energies below $\sim 10$ GeV.
Moreover a boundary condition needs to be imposed at large distances
(above and below the disc) to ensure the stationarity of the...
Melissa Pesce-Rollins
(INFN-Pisa)
04/08/2015, 12:00
Fermi LAT >30 MeV observations of the active Sun have increased the number of detected solar flares by almost a factor of 10 with respect to previous space observations. These sample both the impulsive and long duration phases of GOES M and X class flares. Of particular interest are the recent detections of two solar flares whose position behind the limb was confirmed by the STEREO-B...
Dr
Nikolay Topchiev
(Lebedev Physical Institute)
04/08/2015, 12:00
The GAMMA-400 is designed
to measure fluxes of gamma rays and the electron–positron cosmic-ray component possibly associated with annihilation or decay of dark matter particles; and to search for and study in detail Galactic Center, discrete and extended gamma-ray sources, to measure the energy spectra of Galactic and extragalactic diffuse gamma rays, and to study gamma-ray bursts and gamma...
Dr
Alexander Karelin
(NRNU MEPhI)
04/08/2015, 12:00
The large-scale anisotropy (or the so-called star-diurnal wave) has been studied in the frame of research carrying out in space with the PAMELA instrument. It was studied during the time period covering 2006-2014 for the Southern and Northern hemispheres simultaneously. The cosmic ray intensity distribution was constructed in the equatorial coordinate system and anisotropy was obtained. For...
Dr
Akitoshi Oshima
(Chubu University, Aichi, Japan)
04/08/2015, 12:15
From the density gradient of galactic cosmic rays derived from the Swinson flow and the regression coefficients between the intensity variations of cosmic rays and the solar wind velosity, we have derived the diffusion coefficient and the scattering mean free path of galactic cosmic rays in the heliosphere near the Earth. In this analysis we have used the data obtained by the large area muon...
Dr
Alexandre Marcowith
(LUPM)
04/08/2015, 12:15
During their journey in the Galaxy, Cosmic Rays (CRs) are scattered by magnetic perturbations that can be well described by the magneto-hydrodynamic (MHD) theory. The very nature of the interaction still however remains largely unknown. In this work we investigate by the mean of direct numerical calculations the CR propagation in large scale driven turbulence. The MHD fluctuations are...
Nicholas Cannady
(Louisiana State University)
04/08/2015, 12:15
The CALorimetric Electron Telescope (CALET) is a space-borne cosmic ray calorimeter system planned for installation on the JEM-EF platform on the International Space Station (ISS) in 2015. The CALET collaboration is a Japan-led team collaborating with researchers in Italy and the U.S. In addition to precise measurement of the cosmic ray electron and nuclei spectra, the CALET calorimeter...
Dr
Philipp Mertsch
(KIPAC, Stanford University)
04/08/2015, 12:15
The arrival directions of multi-TeV cosmic rays show significant anisotropies at small angular scales. It has been argued that this small scale structure is the reflection of the local, turbulent magnetic field in the presence of a global dipole anisotropy in cosmic rays as determined by diffusion. This effect is analogous to weak gravitational lensing of temperature fluctuations of the cosmic...
Mr
Andrew Flinders
(University of Utah)
04/08/2015, 12:15
Geminga was first detected as a gamma-ray point source by the SAS-2 gamma-ray satellite observatory and the COS-B X-ray satellite observatory. Subsequent observations have identified Geminga as a heavily obscured radio-quiet pulsar associated with a nearby (250 pc) late Sedov phase (300,000 year) supernova remnant. The Geminga pulsar is the second brightest source detected by the Large Area...
Matthias Kadler
(Uni Würzburg)
04/08/2015, 14:00
The IceCube collaboration has detected an extraterrestrial neutrino flux with the most significant signal in the southern sky at PeV energies. In spite of its smaller volume, the ANTARES telescope provides comparable sensitivity and superior angular resolution at the given southern declinations and energies below ~100TeV and is thus the ideal instrument to constrain the neutrino spectrum of...
Timo Karg
(DESY)
04/08/2015, 14:00
Christoph Deil
(MPI for Nuclear Physics, Heidelberg)
04/08/2015, 14:00
The H.E.S.S. Galactic plane survey (HGPS) was performed with the H.E.S.S. I Cherenkov telescope array in Namibia from 2004 to 2013. Roughly ~2800 hours of high-quality observations of the Galactic disk are available in the Galactic longitude range 250 to 65 degrees and Galactic latitude range |b| < 3.5 degrees. This is the first high-resolution (~0.1 deg) and sensitive (~2% Crab nebula...
Rendani Nndanganeni
(North-West University (Potchefstroom campus) South Africa)
04/08/2015, 14:00
Modeling and the subsequent understanding of the processes responsible for the solar modulation of Jovian and galactic electrons require that a source function for Jovian electrons and a heliopause spectrum (HPS) for galactic electron as an input spectrum be specified at the heliopause (assumed to be the solar modulation boundary). Using a comprehensive three-dimensional numerical model based...
Igor Moskalenko
(Stanford University)
04/08/2015, 14:15
Recent years are marked with many breakthroughs in astrophysics of cosmic rays (CRs), and more are expected in the nearest future. Their proper interpretation is impossible without a well-developed propagation code. The GALPROP project celebrates its 19th anniversary this year. This project is devoted to the development of a self-consistent model for CR propagation in the
Galaxy and...
Hans Niederhausen
(Stony Brook Univ.)
04/08/2015, 14:15
We have performed a new measurement of the all-sky diffuse flux of high energy, E>10TeV, extraterrestrial neutrino induced showers (cascades) based on IceCube data collected during 641 days in 2010--2012. Cascades arise predominantly in electron and tau neutrino interactions and have good energy resolution, so that they are well-suited for the spectral characterization of the extraterrestrial...
Aion Viana
(MAX-PLANCK-INSTITUT FÜR KERNPHYSIK)
04/08/2015, 14:15
The Galactic Centre region has been observed by the H.E.S.S. I array of ground-based Cherenkov telescopes since 2004 leading to the detection of the very-high-energy (VHE, E > 100 GeV) gamma-ray source HESS J1745-290 spatially coincident with the supermassive black hole Sgr A*. Diffuse TeV gamma-ray emission has been detected along the Galactic ridge, most likely due to cosmic-ray interactions...
Riccardo Munini
(INFN - Universita Studi Trieste)
04/08/2015, 14:15
The satellite-borne PAMELA experiment was launched in June 2006 from the Baikonur cosmodrome and since than it has been taking data.
The apparatus design is particularly suited for particle and antiparticle identification. At this conference we present
the half-yearly galactic cosmic ray electron and positron spectra measured down to 70 MeV and from July 2006 to December 2009.
The most...
Ralf-Juergen Dettmar
(Ruhr-University Bochum)
04/08/2015, 14:30
First results from a new radiocontinuum study of edge-on galaxies are presented. The study is based on data from the CHANG-ES (Continuum HAlos in Nearby Galaxies - an EVLA Survey; PI J. Irwin) project which has observed 35 edge-on galaxies with the Karl G. Jansky Very Large Array (JVLA) in two frequency bands (L- and C-band) and in three array configurations (D, C, B). This survey benefits...
Peter Eger
(MPIK Heidelberg)
04/08/2015, 14:30
The shell-type supernova remnant (SNR) RX J1713.7-3946 is one of the brightest TeV gamma-ray sources in the Galaxy detected by the High Energy Stereoscopic System (H.E.S.S.). Despite extensive multi-wavelength coverage in gamma-rays, X-rays and lower energy regimes, the nature of the underlying gamma-ray radiation mechanisms is still under debate.
Here, we present new precision...
Katherine Rawlins
(University of Alaska Anchorage)
04/08/2015, 14:30
With the IceTop detector at the South Pole, a spectrum of cosmic ray air shower size $S_{125}$ can be unfolded into an energy spectrum of primary cosmic rays. When the IceTop data is analyzed in coincidence with high-energy muon energy loss information from the deep IceCube detector, both the spectrum and mass composition of primary cosmic rays can be extracted using a neural network. Both of...
Godfrey sibusiso Nkosi
(Vaal University of technology)
04/08/2015, 14:30
Several space missions have improved our knowledge of the solar modulation of galactic cosmic rays in the heliosphere during the past 40 years (e.g. Pioneer 10 & 11, Voyager 1 & 2, IMP 8, Ulysses, PAMELA and more). These data sets are from solar minimum to solar maximum activity with clear differences in the energy spectra of the positive and negative magnetic polarity cycles. The modulation...
Luigi Antonio Fusco
(University of Bologna)
04/08/2015, 14:30
Compelling evidence of the existence of cosmic neutrinos has been reported by the IceCube collaboration. Some features of this signal could be explained by a Northern/Southern sky asymmetry of the flux. This possible asymmetry would be related to the presence of the bulk of our Galaxy in the Southern sky.
The ANTARES neutrino telescope, located in the Mediterranean Sea, consists of a three...
Satyendra Thoudam
(Radboud University)
04/08/2015, 14:45
Motivated by the recent high-precision measurements of the cosmic-ray energy spectrum and composition by several new-generation experiments, a detailed study to understand the observed properties of cosmic rays up to the highest energies is being conducted. The study involves building a cosmic-ray propagation model in the Galaxy that explains the observed spectra of different cosmic-ray...
Nukri Komin
(Wits University)
04/08/2015, 14:45
The Large Magellanic Cloud (LMC) is an irregular satellite galaxy of the Milky Way, which has been observed extensively at Very-High-Energy (VHE) gamma-rays with the H.E.S.S. telescopes, obtaining a deep exposure of 210 hours. In this talk we will present the results of this campaign.
Besides the already known PWN N 157B, these observations establish significant VHE gamma-ray emission from...
Carlo Francesco Vigorito
(Universita' & INFN Torino, Italy)
04/08/2015, 14:45
The Large Volume Detector (LVD) in the INFN Gran Sasso National
Laboratory, Italy, is a 1 kton liquid scintillator neutrino observatory
mainly designed to study low energy neutrinos from gravitational stellar
collapses. LVD is sensitive to core-collapse supernovae via neutrino
burst detection with 100\% efficiency over our own entire Galaxy.
The result of the search of neutrino bursts...
Dr
Inés Valiño
(University of Santiago de Compostela)
04/08/2015, 14:45
The flux of cosmic rays has been measured with unprecedented precision and statistics at the Pierre Auger Observatory. We report an update of the all-sky flux of cosmic rays above $3{\times}10^{17}$ eV obtained by combining four independent data sets. These measurements are based on data from the surface detector (divided into two sets according to the shower zenith angle), from a nested...
Jan Gieseler
(University of Kiel)
04/08/2015, 14:45
Galactic Cosmic Rays (GCRs) are modulated by various effects as they propagate through the heliosphere before they are detected at Earth. This transport can be described by the Parker equation (Parker, 1965). It calculates the phase space distribution of GCRs depending on the main modulation processes: convection, drifts, diffusion and adiabatic energy changes. A first order approximation of...
Mr
Leif Rädel
(RWTH Aachen University)
04/08/2015, 15:00
The IceCube Collaboration measured an all-flavor, high-energy astrophysical neutrino flux. In order to identify the sources of this flux, high-energy muon neutrinos are ideal messenger particles because of their excellent angular resolution. However, the first step is to confirm the observed flux in the muon neutrino channel using IceCube data from 2009 through 2014. The main background for...
Markus Holler
(LLR - Ecole Polytechnique)
04/08/2015, 15:00
Dr
Pankaj Kumar Shrivastava
(Govt.Model Science College,Rewa(M.P.)India)
04/08/2015, 15:00
Galactic cosmic rays are modulated through their propagation in interplanetary medium by the effect of large scale disturbances in sun related interplanetary medium. Often the interplanetary parameters used in modulation are solar wind velocity V and interplanetary magnetic field B. For this study, we have used the monthly, quarterly, half yearly and yearly mean values of solar wind velocity...
Dmitri Ivanov
(University of Utah)
04/08/2015, 15:00
The Telescope Array (TA) covers an energy range from 4 PeV to over 100 EeV. TA is a hybrid detector that uses air fluorescence detectors (FD) combined with a ground array. In May 2015, TA will have collected 7 years of data. The TA low energy extension (TALE), which sees cosmic rays down to 4 PeV, consists of additional fluorescence telescopes at one of the TA FD stations. An infill array of...
David Alain Maurin
(Centre National de la Recherche Scientifique (FR))
04/08/2015, 15:00
I present the first public release of the USINE code for charged galactic cosmic-ray (GCR) propagation. USINE is a C++ toolbox handling GCR ingredients and several semi-analytic propagation models (1D and 2D). Non-public versions of this code were used in the last 10 years to fit the transport parameters, study radioactive nuclei, antinuclei and possible DM contributions, etc. The...
Prof.
Kazuoki Munakata
(Department of Physics, Shinshu University)
04/08/2015, 15:15
We analyze the north-south anisotropy (NSA) of galactic cosmic rays (GCRs) observed with the GMDN on hourly basis in the “toward” (T) and “away” (A) IMF sectors separately. From the monthly mean and its standard error of NSA in each of T and A sectors, we deduce the “T/A separation” and its temporal variation during a period between 2006 and 2014. We also examine the “success rate” which is a...
Dr
Ervin Kafexhiu
(Max-Planck-Institut für Kernphysik)
04/08/2015, 15:15
Using publicly available Monte Carlo codes as well as compilation of published data on $pp$ interactions for proton kinetic energy below 2 GeV, we parametrize the energy spectra and production rates of $\gamma$-rays by simple but quite accurate ($\leq 20 \%$) analytical expressions in a broad range from the kinematic threshold to PeV energies.
Michael Gajdus
(Humboldt Universität zu Berlin)
04/08/2015, 15:15
The Vela pulsar (PSR J0835-4510) is the brightest persistent source in the high-energy γ-ray sky. It is a relatively near, young and energetic rotation-powered pulsar. Vela was a key target for the High Energy Stereoscopic System phase II array (H.E.S.S. II). Observations were carried out following a hint of pulsed emission above 20 GeV seen using Fermi-LAT data. In this talk we present...
Mr
Masayoshi Kozai
(Department of Physics, Shinshu University)
04/08/2015, 15:30
Galactic cosmic ray (GCR) depleted regions behind the interplanetary shocks or disturbances cause the Forbush decreases (Fds), short term decreases of the GCR isotropic intensity (or GCR density) at the Earth. We can deduce the geometries of the depleted regions from three-dimensional GCR anisotropy associated with Fds, because the first order anisotropy reflects the spatial gradient of GCR...
Vladimir Zirakashvili
(IZMIRAN)
04/08/2015, 15:30
It is shown that astrophysical neutrinos observed by IceCube can be produced by protons accelrated at IIn supernova remnant shocks propagating in the dense circumstellar medium. The nonlinear diffusive shock acceleration model is used for description of particle acceleration. We calculate the neutrino flux produced by a single IIn supernova remnant and the neutrino background produced by all...
Mr
Steffen Hallmann
(ECAP - FAU Erlangen)
04/08/2015, 15:30
The Fermi Bubbles are two giant lobes of $\gamma$-ray emission above and below the Galactic Center. Whereas the origin of the observed $\gamma$-ray flux remains obscure, the measurement of a neutrino flux from the Fermi Bubbles could distinguish between leptonic and hadronic emission scenarios.
Such a search for a neutrino signal from the Fermi Bubbles has been performed with the ANTARES...
Dr
Robert Parsons
(Max Planck Institute for Nuclear Physics)
04/08/2015, 15:30
The Galactic Centre has been studied with the H.E.S.S. array for over 10 years, revealing a bright, complex gamma-ray morphology above 100 GeV. Besides a strong point-like very-high-energy gamma-ray source coincident with the supermassive black hole Sgr A*, previous analyses also revealed a diffuse ridge of gamma-ray emission, indicative of a powerful cosmic-ray accelerator in this region.
...
Harm Schoorlemmer
(University of Hawaii)
04/08/2015, 15:30
The first flight of the Antarctic Impulse Transient Antenna (ANITA) experiment recorded 16 radio signals that were emitted by cosmic ray induced air showers. Recent developments in simulation packages made it possible to estimate the cosmic ray energy from these observations. In this talk we introduce a novel method to estimate the cosmic ray energy and apply it to the observations. We...
Dmitry Zaborov
(LLR - Ecole Polytechnique)
04/08/2015, 15:45
The recent addition of the 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity towards low energies. The lowest energy threshold is obtained using monoscopic observations with CT5, providing access to gamma-ray energies below 100 GeV. This is particularly beneficial for studies of Active Galactic Nuclei (AGN) with soft spectra and located at redshifts...
Prof.
Karel Kudela
(IEP SAS, Watsonova 47, 04001 Košice, Slovakia)
04/08/2015, 15:45
A detailed analysis has been made of annual meteorological, and cosmic ray, data from the Lomnicky stit mountain observatory (2634 masl), from the standpoint of looking for possible solar cycle (including cosmic ray) manifestations. Interestingly, it is found that taking the two 'recent' Solar Cycle periods (SC 22 and 23), the measured 'cloud cover' is nearly linearly proportional to the...
Prof.
Glennys Farrar
(New York University)
04/08/2015, 15:45
The sharp change in slope of the ultra-high energy cosmic ray spectrum around 10^18.6 eV (the ankle), combined with evidence of a light but extragalactic component near and below the ankle and intermediate composition above, has proved exceedingly challenging to understand theoretically.
We propose a mechanism whereby photo-disintegration of ultra-high energy nuclei in the region...
Dr
MAHENDRA KUMAR RICHHARIA
(GOVERNMENT MODEL SCIENCE COLLEGE,JABALPUR(M.P.) INDIA 482001)
04/08/2015, 16:00
The aim of this work is to study the long term variation in third harmonics of cosmic ray intensity on sixty quietest days in a year using the data of high latitude and low latitude neutron monitoring stations during the solar cycle 20-22.It has been observed that in spite of the abrupt change in the amplitude and phase of third harmonic of cosmic ray intensity, the amplitude of third...
Dr
Renata Modzelewska
(Siedlce University)
04/08/2015, 16:00
The temporal evaluation of the 27-day variation of the three dimensional (3D) galactic cosmic ray (GCR) anisotropy has been studied for 1965-2014. 3D anisotropy vector was obtained based on the neutron monitors and Nagoya muon telescopes data. We analyze the 27-day variation of the (1) two dimensional (2D) GCR anisotropy in the ecliptic plane, and (2) North-South anisotropy (ANS) normal to...
Dr
Takanori Yoshikoshi
(Institute for Cosmic Ray Research, University of Tokyo)
04/08/2015, 16:00
We have been setting up a 3-meter diameter atmospheric Cherenkov telescope in Akeno, Japan, for various R & D studies mainly on very high energy gamma-ray astrophysics. This Davies-Cotton type telescope (Akeno telescope, hereafter) was manufactured in 1998 and has been recommissioned at low cost. A low power consumption imaging camera system has been developed for a future gamma-ray...
Simon Bacholle
(APC- Paris Diderot university)
04/08/2015, 16:00
The future JEM-EUSO instrument is a UV telescope to be installed on the International Space Station (ISS) with the goal of observing Extensive Air Showers (EAS) created by Ultra-High Energy Cosmic Rays (UHECRs). EUSO-balloon is a pathfinder mission for JEM-EUSO which flew in a stratospheric balloon from Timmins, Canada in August 2014. Due to its placement on the ISS, two major specifications...
Prof.
T.Brian Humensky
(Columbia University)
04/08/2015, 16:00
The Cherenkov Telescope Array (CTA) is an international next-generation ground-based gamma-ray observatory. CTA will be implemented as one or more arrays of tens of small, medium and large-sized imaging Cherenkov telescopes with the goal of improving the sensitivity of the current-generation experiments by an order of magnitude. CTA will provide energy coverage from ~20 GeV to more than 300...
Shoushan Zhang
(Institute of High Energy Physics)
04/08/2015, 16:00
The Large High Altitude Air Shower Observatory (LHAASO) will be constructed at Mt. Haizi in Sichuan Province, China. Among several detector components of the LHAASO, the Water Cherenkov Detector Array (WCDA) is of great importance for low-to-middle energy gamma ray astronomy. The WCDA has an area of 90,000 m2 in total, which is sub-divided into 3600 cells by curtains, with a PMT resided in...
Henrike Fleischhack
(DESY)
04/08/2015, 16:00
VERITAS is an imaging atmospheric Cherenkov telescope array that is sensitive to very-high energy gamma-rays from 85 GeV to 30 TeV. We present a high-performance shower-image analysis. The algorithm is based on the likelihood fitting of the charge amplitude in the camera pixels to an expected image template. The templates are generated by performing Monte-Carlo simulations of a large number of...
Du Toit Strauss
(North-West University, South Africa)
04/08/2015, 16:00
The study of the modulation of cosmic rays in the heliosphere has recently been done by using increasingly the stochastic differential equation (SDE) approach to solving the well-known transport equation. This approach, which is now well-established and published, allows for an in depth study of the modulation effects of the wavy heliospheric current sheet (HCS), in particular as its waviness...
Thomas Paul
(Lehman College, City University of New York)
04/08/2015, 16:00
The Extreme Universe Space Observatory (JEM-EUSO) is designed to detect the highest energy particles in the Universe by observing the fluorescence and (reflected) Cherenkov light produced when these ultrahigh energy cosmic rays (UHECR) traverse the Earth's atmosphere. Unlike existing cosmic ray observatories, JEM-EUSO will view the atmosphere from above, as the instrument will be attached to...
PRAVATA MOHANTY
(Tata Institute of Fundamental Research, Mumbai, India)
04/08/2015, 16:00
A large area (560~m$^2$) tracking muon detector operating in the GRAPES-3
experiment at Ooty in India has been recording cosmic ray muons at a rate of
1.7$\times$ 10$^8$ h$^{-1}$ since 2000. The high statistics data have enabled
sensitive measurement of several solar phenomena to be made including the
solar and sidereal anisotropy and Forbush decreases following coronal mass
ejections....
Mr
Mohammad Sabouhi
(Department of Physics , Semnan University, P.O. Box 35196-45399, Semnan, Iran)
04/08/2015, 16:00
Abstract: The propagation direction is one of the key parameter of an air shower. Many of current techniques are based on arrival time of an air shower. In this study we introduce a new and completely different approach to determine the propagation direction (and as a result the arrival direction) of an air shower based on filtered peak radio amplitudes which can shape radio signal patterns....
Mr
Sayan Biswas
(Senior Research Fellow, Bose Institute)
04/08/2015, 16:00
Finite lumps of strange quark matter in the form of strangelets, theorized absolute ground state of QCD containing a bound state of approximately equal numbers of up, down and strange quarks, are supposed to be more stable than $^{56}{\rm {Fe}}$ nuclei. Recent simulation studies suggest that a major source of strangelets in the Galaxy may be the fragmentation of tidally released bulk strange...
Dr
Benjamin Zitzer
(McGill University)
04/08/2015, 16:00
In the cosmological paradigm, cold dark matter (DM) dominates the mass content of the Universe and is present at every scale. Candidates for DM include many extensions of the standard model, with weakly interacting massive particles (WIMPs) in the mass range from ~10 GeV to greater than 10 TeV. The self-annihilation or decay of WIMPs in astrophysical regions of high DM density can produce...
Jan Kunnen
(Vrije Universiteit Brussel)
04/08/2015, 16:00
Many models predict new particles that have the properties of a Weakly Interacting Massive Particle (WIMP) and could explain the dark matter observed in the universe. Heavy celestial bodies, such as the Earth, could capture these WIMPs and accumulate them. Over time the WIMPs will self-annihilate and may produce standard model particles, including neutrinos. Large scale neutrino telescopes,...
Aya Ishihara
(Chiba University)
04/08/2015, 16:00
Observations of extremely high energy neutrinos are expected to probe the origin of the highest energy cosmic rays with energies up to and above $10^{20}$eV. Cosmogenic neutrinos are associated with the interaction of those most energetic cosmic rays with cosmic microwave background photons (GZK effect) and considered a guaranteed astrophysical neutrino signal. The cosmogenic neutrinos have...
Mrs
GRACE IHONGO
(UNIVERSITY OF ABERDEEN)
04/08/2015, 16:00
Galactic cosmic ray flux calculated at 1au within the energy range (0.2-88) Ge V using the model is presented. The relationship between the calculated flux and solar wind is analyzed and presented. Short-time variation of the flux at a fixed energy range is also calculated, and this is used to predict galactic cosmic ray intensity variation at earth.
Mr
Camille Moretto
(Laboratoire de l'Accélérateur Linéaire, Université Paris-Sud/CNRS)
04/08/2015, 16:00
EUSO-Balloon is a balloon borne mission operated by CNES during a one-night flight in August 2014 over the Ontario forest, in Canada, at 38 km altitude. The payload is a technological demonstrator for the Extreme Universe Space Observatory (JEM-EUSO) aiming at the detection of Extensive Air Showers (EAS) induced by Ultra High Energy Cosmic Rays (UHECR) from the International Space Station...
Rashmi Johnson
(SSN College of Engineering)
04/08/2015, 16:00
The radiation present today as a 2.7 K thermal background originated when the universe was denser by a factor of 109 and younger by a factor of around 5× 104. The radiation provides the most distant direct image of the universe we can hope to see, at least until gravitational radiation becomes a useful astronomical data source. The microwave background radiation is extremely uniform, varying...
Mr
Klaus Wiebe
(Johannes Gutenberg-Universität Mainz)
04/08/2015, 16:00
Dark matter particles can be trapped in massive celestial bodies, such as the Sun or the Earth. Their self-annihilations may produce standard model particles, including neutrinos of all flavors. Recent developments of reconstruction tools have allowed us to reconstruct electron and tau neutrino interactions with adequate angle and energy resolutions and to estimate the corresponding...
Joshua Wood
(University of Maryland, College Park)
04/08/2015, 16:00
The High Altitude Water Cherenkov (HAWC) Observatory is a ground-based, TeV gamma-ray observatory in the state of Puebla, Mexico at an altitude of 4100m. Its 22,000 m$^2$ instrumented area, wide field of view (~2 sr), and >95% uptime make it an ideal instrument for discovering gamma-ray burst (GRB) emission at ~100 GeV. Such a discovery would provide key information about the origins of prompt...
753.
An Additional Component Blurring the Transition between Galactic and Extragalactic Cosmic Rays?
Olivier Deligny
(CNRS/IN2P3)
04/08/2015, 16:00
Recent KASCADE-Grande and Auger results between $10^{17}~$eV and $5~10^{18}~$eV have revealed complex features in the energy spectrum, be it in the all-particle one or in the composition-sensitive ones. They have also revealed that the mass composition is dominated by iron nuclei around $10^{17}~$eV, and by light and intermediate-nuclei elements above $10^{18}~$eV. In this contribution, we...
Mr
Christian Sarmiento-Cano
(Universidad Industrial de Santander)
04/08/2015, 16:00
The Latin American Giant Observatory (LAGO) is an extended Cosmic Rays observatory composed by a network of Water Cherenkov Detectors (WCDs) spread over Latin America. This work will report the analysis of three years of data from three LAGO WCD located in Cerro Chacaltaya, Bolivia, at 5200 m a.s.l. Background cosmic ray rate from these detectors is checked for DAQ issues and inconsistencies,...
Beatrice Panico
(INFN Napoli (IT))
04/08/2015, 16:00
EUSO-Balloon is a balloon-borne experiment, conceived as a pathfinder for JEM-EUSO experiment which is the first experiment measuring the highest energy cosmic rays from space.
EUSO-Balloon is equipped with an optical system made by two Fresnel lenses and one photo detection module (PDM), representing a complete prototype for the JEM-EUSO experiment.
On 24th August 2014 EUSO-Balloon was...
Yury Balabin
(Polar geophysical institute)
04/08/2015, 16:00
Analysis of data of world network neutron monitor (NM) has revealed the considerable annual variation of cosmic ray (CR) flux in 2011-2014. The variation observed at all stations: circumpolar, mid-latitude and subequatorial. It is present in the CR density changes obtained by the global survey. Annual variation is observed from 2011 to 2014. Phase variation is the same for all NM with a...
Mr
Benjamin Rotter
(University of Hawaii at Manoa)
04/08/2015, 16:00
Regions of parameter space for a nearly forty year old hypothesis explaining dark matter with the existence of heavy composite quark objects remain unexplored. The Antarctic Impulsive Transient Antenna (ANITA) experiment, a NASA-sponsored long duration balloon payload, is in a unique position to test this exotic dark matter candidate by exploiting the sensitivity of an on-board monitoring...
Mr
Mohammad Sabouhi
(Department of Physics , Semnan University, P.O. Box 35196-45399, Semnan, Iran)
04/08/2015, 16:00
Abstract: There are many discussions about the best possible type of air showers to radio detections. Two types of air showers are under considerations, Vertical and Inclined. In this study based on CORSIKA and CoREAS simulations, we are going to investigate the best type of aforementioned air showers especially for experimental purposes. We compare raw radio pulses and filtered peak radio...
Bruno Khelifi
(APC, IN2P3/CNRS)
04/08/2015, 16:00
The LAT telescope on board of the Fermi satellite provides the deepest survey of the gamma-ray sky in the 100 MeV to 300 GeV energy range. Recently published, the 3FGL catalog contains 3033 sources obtained from the analysis of 4 years of data. While 2043 of these sources are associated with objects identified at other wavelengths, the most numerous populations corresponding to blazars (1145)...
Dr
James Adams
(University of Alabama in Huntsville)
04/08/2015, 16:00
The Extreme Universe Space Observatory (EUSO) instrument is being developed for deployment on the International Space Station (ISS). Looking down from its berth on the ISS, EUSO will take high speed UV video of Extensive Air Showers (EAS) caused by cosmic rays. Using these videos, the energy and arrival direction of each cosmic ray will be reconstructed. In order to reconstruct the energy, the...
Fengrong Zhu
(Southwest Jiaotong University),
Shoushan Zhang
(Institute of High Energy Physics),
Yong Zhang
(Institute of High Energy Physics),
Zhandong Sun
(Southwest Jiaotong University),
Zhen Cao
(Institute of High Energy Physics)
04/08/2015, 16:00
Abstract:
Atmospheric monitoring is the key for experiments using the air Cherenkov/fluorescence techniques. In particular cloud monitoring is of great importance to evaluate “clearness” of night skies which affects to shower images obtained by the Wide Field of view Cherenkov/Fluorescence Telescope Array(WFCTA). A nitrogen laser has been installed at the ARGO-YBJ site for the cloud...
Jose Luis Sánchez
(University of León),
Maria Rodriguez Frias
(Space and Astroparticle Group UAH Madrid)
04/08/2015, 16:00
The EUSO-Balloon (CNES) campaign was conducted during the summer of 2014. EUSO-Balloon was launched the night of August 24. A completely isolated Infrared Camera was mounted on the side of the gondola carrying the EUSO-Balloon instrument. During part of the balloon flight a helicopter with UV flashers was flown below the balloon. We have retrieved cloud coverage and Cloud Top Height (CTH) from...
Jose Luis Sánchez
(University of León),
Maria Rodriguez Frias
(Space and Astroparticle Group UAH Madrid)
04/08/2015, 16:00
EUSO-BALLOON (CNES) was launched on August 24, 2014 from Timmins (Canada) with a biespectral Infrared Camera onboard intended to measure the cloud coverage during the flight. Clouds at mid and upper levels of the Troposphere are crucial for a proper reconstruction of the main parameters of the Ultra-High Energy Cosmic Rays (UHECR).Therefore, determining Cloud Top Height (CTH) with high...
Nicola Tomassetti
(Centre National de la Recherche Scientifique (FR))
04/08/2015, 16:00
The AMS Collaboration has recently released data on cosmic ray (CR) leptons and hadrons that can shed light on two exciting problems in CR physics: on one side, the origin of the rise of the CR positron fraction above 10 GeV of energy, on the other side, the nature of the spectral features observed in CR protons and helium at ~TeV energies. In this work, the AMS data are described using a...
Mr
Ramesh Koirala
(University of Delaware)
04/08/2015, 16:00
The Constant Intensity method is used to study how signals in IceTop, the surface component of the IceCube Neutrino Observatory, are attenuated by the atmosphere as a function of zenith angle and primary energy. IceTop analyses so far have only used data with zenith angles less than 40$^o$. A goal of this analysis is to extend the standard IceTop reconstruction to larger zenith angles. Showers...
Mr
Christoph Toennis
(Ific)
04/08/2015, 16:00
In this work we describe the search for Secluded Dark Matter (SDM) annihilation from the Sun with ANTARES. SDM is a special scenario where DM, which would gravitationally accumulate in astrophysical objects like the Sun, is annihilated into a pair of non-Standard Model mediators, which subsequently decay into SM particles. It was suggested to explain some experimental observations, such as the...
Dr
Rogerio M. de Almeida
(Universidade Federal Fluminense)
04/08/2015, 16:00
Cosmic rays of ultra-high energy are one of the great puzzles of modern physics. So far their production mechanisms, sources, chemical composition and abundances as a function of energy are unknown. One can infer the primary mass composition from the depth of maximum,
Xmax, of the longitudinal development of air showers induced by cosmic rays. Measurements of the evolution of this observable...
Ms
Mika Kagaya
(Ibaraki University)
04/08/2015, 16:00
The current experimental statistics of ultra high-energy cosmic rays (UHECRs) is not sufficient for identification of the sources, although a spatial correlation between the arrival directions of UHECRs and nearby active galactic nuclei (AGNs) has been discussed using the data of the Pierre Auger Observatory and the Telescope Array.
Here, we focused on the Fermi Large Area Telescope...
Maxim Pshirkov
(Moscow State University)
04/08/2015, 16:00
Extragalactic magnetic fields remain extremely elusive. Non-observation of cascade gamma-rays from VHE sources imply that there is a lower bound on their strength $B_{min}\sim10^{-17}$ G. The upper bound could be larger than $10^{-8}$ G. Magnetic fields of such strength could considerably alter the process of UHECR propagation, increasing deflection of proton UHECRs and even introducing...
Daniel Nieto Castano
(Columbia University)
04/08/2015, 16:00
The Cherenkov Telescope Array (CTA) is an international project for a next-generation ground-based gamma-ray observatory. CTA, conceived as
an array of tens of imaging atmospheric Cherenkov telescopes, comprising small, medium and large-size telescopes, is aiming to improve on the sensitivity of current-generation experiments by an
order of magnitude and provide energy coverage from 20 GeV...
Dr
Marcos Santander
(Barnard College, Columbia University)
04/08/2015, 16:00
A medium-sized Schwarzchild-Couder Telescope (SCT) is being developed as a possible extension for the Cherenkov Telescope Array (CTA). The Cherenkov camera of the telescope is designed to have 11328 silicon photomultiplier pixels capable of capturing high-resolution images of air showers in the atmosphere. The combination of the large number of pixels and the high trigger rate (> 5 kHz)...
Prof.
Lev Dorman
(IZMIRAN (Russia) and Tel Aviv University (Israel))
04/08/2015, 16:00
A.V. Belov1, R.T.Gushchina1, L.I.Dorman1,2, V.G.Yanke1
1. IZMIRAN, Kalushskoe ave., 4, Troitsk, Moscow, 142190, Russia
2. Israel Cosmic Ray and Space Weather Center with Emilio Segre’ Observatory on Mt. Hermon, affiliated to Tel Aviv University, Golan Research Institute, and Israel Space Agency
Dorman L. lid010529@gmail.com
Gushchina R. ...
Dr
Gwenael Giacinti
(University of Oxford, Clarendon Laboratory)
04/08/2015, 16:00
Progenitors of some supernovae (especially Type IIn) are expected to explode in circumstellar environments containing clumps, or shells from previous eruptions. We show that supernovae occurring in such structured environments must be able to accelerate cosmic rays (CR) to high or very-high energies.
In this work, we present a detailed study of the maximum CR energy that can be reached in...
Dr
Pierre Colin
(Max-Planck-Institut für Physik, D-80805 München, Germany), Dr
Roberta Zanin
(Universitat de Barcelona (ICC, IEEC-UB), E-08028 Barcelona, Spain)
04/08/2015, 16:00
The W44 region includes the supernova remnant SNR G34.7-0.4 and two additional surrounding GeV sources, revealed with Fermi Large Area Telescope (LAT); the whole system is embedded in the giant molecular cloud G34.8-0.6.
In the hypothesis that hadrons are accelerated at the SNR shock, the geometry of the system suggests a possible signature of their diffusion and interaction with the cloud...
Dr
Roger Ygbuhay
(University of New Mexico)
04/08/2015, 16:00
At high rigidities (≥ 10 GV) galactic cosmic ray (GCR) particle density gradients and mean free paths (λ) in turbulent interplanetary magnetic field (B) at 1 a.u. can only be computed from the solar diurnal anisotropy (SDA) data. Long-term changes of SDA components recorded by the global network of neutron monitors (NMs) with long track records are used to compute the annual mean values of the...
Vladimir Zirakashvili
(IZMIRAN)
04/08/2015, 16:00
We discuss what types of supernova remnants
can be the sources of PeV cosmic rays and of the
corresponding gamma-ray emission.
Prof.
Istomin Yakov
(Moscow Institute Physics and Technology)
04/08/2015, 16:00
From the analysis of the flux of high energy particles, $E>3\cdot
10^{18}eV$, it is shown that the distribution of the power density
of extragalactic rays over energy is of the power law, ${\bar
q}(E)\propto E^{-2.7}$, with the same index of $2.7$ that has the
distribution of Galactic cosmic rays before so called 'knee',
$E<3\cdot 10^{15}eV$. However, the average power of...
Prof.
Leonid Kuzmichev
(SINP MSU)
04/08/2015, 16:00
DAQ and time synchronization system for the Tunka-HiSCORE array has been developed. The system consists of 8-channel optical station board (OSB) for digitization of anode and dynode signals of 4 PMTs of the optical station and synchronization boards (SB) placed in the DAQ center. All boards are designed on the basis of DRS-4 chip and FPGA Xilinx Spartan-6. The OSB and SB boards are connected...
Dr
Brenda Dingus
(Los Alamos National Laboratory)
04/08/2015, 16:00
In order to observe annihilation and decay of dark matter, several types of potential sources should be considered. Some sources, such as dwarf galaxies, are expected to have very low astrophysical backgrounds but fairly small dark matter densities. Other sources, like the Galactic center, are expected to have larger densities of dark matter but also have more complicated backgrounds from...
Adrian Rovero
(Instituto de Astronomia y Fisica del Espacio (IAFE, CONICET-UBA))
04/08/2015, 16:00
Very high energy (VHE > 100 GeV) gamma rays coming from blazars can produce pairs when interacting with the Extragalactic Background Light (EBL), initiating an electromagnetic cascade. For a non-null Intergalactic Magnetic Field (IGMF), this cascade may result in an extended isotropic emission of photons around the source (halo), or in a broadening of the emission beam, depending on the IGMF...
Svetlana Rogovaia
(IZMIRAN)
04/08/2015, 16:00
The energy spectra and composition of ultra-high energy
cosmic rays are changing in a course of propagation in the
expanding Universe filled with background radiation. We use
a numerical code for solution of inverse problem for cosmic-ray
transport equations that enables the determination of average source
spectra of different nuclei from the cosmic ray spectra observed at the
Earth. The...
Sylvie Dagoret-Campagne
(LAL/IN2P3/CNRS)
04/08/2015, 16:00
Recently, the EUSO-BALLOON instrument, the pathfinder for future space telescopes of the JEM-EUSO family, has been flown during one night in the stratosphere by CNES.
The recording of light intensity emitted from earth or its atmosphere by its fast and high-resolution pixel UV camera was one of the main goals of this mission.
We present an analysis on the in-flight UV camera calibration...
Hiroki ROKUJO
(Nagoya University)
04/08/2015, 16:00
Gamma-Ray Astro-Imager with Nuclear Emulsion (GRAINE) is a project of cosmic gamma-ray observation using a balloon-borne emulsion detector. The angular resolution of the emulsion gamma-ray telescope (0.08$^{\circ}$ @ 1-2 GeV) is one order of magnitude better than that of the Fermi-LAT. In addition, it has the polarization sensitivity using the pair creation mode. GRAINE aims at high-resolution...
Michał Ostrowski
(Astronomical Observatory of the Jagiellonian University)
04/08/2015, 16:00
The prototype of a Davies-Cotton small size telescope (SST-1M) has been designed and developed by a consortium of Polish and Swiss institutions and proposed for the Cherenkov Telescope Array (CTA) observatory. The main purpose of the optical subsystem is to focus the Cherenkov light emitted by extensive air showers in the atmosphere onto the focal plane detectors. The main component of the...
Masahiro Teshima
(Max-Planck-Institute for Physics)
04/08/2015, 16:00
Development of Slow Control Boards for the Large Size Telescopes of the Cherenkov Telescope Array
Authors:
Daniela Hadasch (1), Yusuke Konno (2), Takayuki Saito (2), Hideyuki Ohoka (1), Hidetoshi Kubo (2), Daisuke Nakajima (1), and Masahiro Teshima (1,3) for the CTA Consortium
Emails: hadasch@icrr.u-tokyo.ac.jp, konno@cr.scphys.kyoto-u.ac.jp, tysaito@cr.scphys.kyoto-u.ac.jp,...
Mr
Shu Masuda
(Kyoto University)
04/08/2015, 16:00
The Cherenkov Telescope Array (CTA) is the next generation ground-based very high energy gamma-ray observatory. The Large-Sized Telescope (LST) of CTA targets 20 GeV – 1 TeV gamma rays and has 1855 photomultiplier tubes (PMTs) installed in the focal plane camera. With the 23 m mirror dish, the night sky background rate amounts to ~200 MHz per pixel. In order to record clean images of gamma-ray...
Michal Dyrda
(Institute of Nuclear Physics PAS)
04/08/2015, 16:00
The Cherenkov Telescope Array (CTA) very high-energy gamma-ray observatory will consist of about a hundred of imaging atmospheric Cherenkov telescopes (IACTs) of different sizes, with a total reflective area of about 10,000 m2. Here we present a novel technology for the production of IACT mirrors that has been developed in the Institute of Nuclear Physics PAS in Krakow, Poland. The mirrors are...
Prof.
David Eichler
(Ben Gurion University)
04/08/2015, 16:00
The possibilities are considered that ultrahigh energy cosmic rays, even at the highest energy, originate a) in our Galaxy and b) specifically at the Fermi bubble.
Anatoly Petrukhin
(National Research Nuclear University MEPhI)
04/08/2015, 16:00
Results on EAS study with a novel type of detector array PRISMA-32 sensitive to accompanying EAS thermal neutron is presented. The array is running in MEPhI (Moscow, Russia) since February, 2012. Comparison with a full-scale Monte Carlo simulation of the experiment using GEANT4 and CORSIKA codes is also shown. It is demonstrated that absolute number of recorded thermal neutrons is in a good...
Dr
Mahendra Kumar Richharia
(Govt. Model Science College, Jabalpur, (M.P.), India)
04/08/2015, 16:00
The tri-diurnal and quart diurnal anisotropy of cosmic ray intensity have been investigated during the solar cycle 21-22 using the neutron monitor data recorded at different latitudes on sixty geomagnetically quiet days in a year. It has been observed that in spite of the abrupt changes in the amplitude and phase of tri-diurnal and quart diurnal anisotropy in cosmic ray intensity, the phase of...
Dr
Shoko Miyake
(National Institute of Technology, Ibaraki College)
04/08/2015, 16:00
Supernova remnants (SNRs) are believed to be the sources of galactic cosmic rays (GCRs). Occurrences of supernovae are obviously discrete in both space and time. Hence we have to take into account this discreteness of the SN occurrences when we investigate the propagation process of GCRs from parent SNRs to the solar system. Recently, we proposed a new and fully three-dimensional numerical...
Rahul Kumar
(Ben Gurion University)
04/08/2015, 16:00
The dynamics of two initially unmagnetized relativistic counter-streaming homogeneous ion-electron
plasma beams are simulated in two dimensions using the particle-in-cell (PIC) method. It is shown
that current laments, which form due to the Weibel instability, develop a large scale longitudinal
electric eld in the direction opposite to the current carried by the laments as predicted by...
Prof.
Mamadsho Ilolov
(Center of Innovative Development of Science and New Technologies of Academy of Sciences of Tajikistan)
04/08/2015, 16:00
Classical description of diffusion process for scalar flux of particles of cosmic rays $u(\vec{r},t,E)$ is based on equation
$$
\frac{\partial u(\vec{r},t,E)}{\partial t}=k(E)u(\vec{r},t,E)+f(\vec{r},t,E),(1)
$$
where $E$ - energy of particles, $f(\vec{r},t,E)$ is density distribution of source and $k(E)$ - diffusion coefficient.
In the last years it is stated that energy spectrum of...
Lawrence Wiencke
(Colorado School of Mines)
04/08/2015, 16:00
The first Balloon-EUSO stratospheric flight launched from Timmins Ontario by the French Space Agency (CNES) recorded artificial tracks and pulses from a laser and optical flashers flown in helicopter (NASA) under the balloon. To make the first measurements of high energy cosmic ray extensive air showers from near space, preparations are underway for a super pressure balloon flight of several...
Simon Bacholle
(APC- Paris Diderot university)
04/08/2015, 16:00
EUSO-Balloon is a pathfinder of the JEM-EUSO experiment that is devoted to the observation of UHECRs from space. It operates under a stratospheric balloon at an altitude of ~ 40 km. A first flight took place in August 2014, and gathered information about the UV background in the nadir direction below the flight altitude. Based on these measurements, we investigate the acceptance of a new...
Johannes Eser
(Colorado School of Mines)
04/08/2015, 16:00
EUSO-Balloon is a prototype detector of the Extreme Universe Space Observatory on the Japanese Experiment Module (JEM-EUSO). EUSO-Balloon was flown successfully as a balloon payload from the Timmins Stratospheric Balloon Launch Facility in Ontario, Canada on 2014 August 24-25 at an altitude of 38 km. To simulate the optical signatures of UV fluorescence photons emitted from cosmic ray air...
Marco Ricci
(Istituto Nazionale Fisica Nucleare Frascati (IT))
04/08/2015, 16:00
Ms
Gwenhaël de Wasseige
(Vrije Universiteit Brussel (VUB))
04/08/2015, 16:00
Since the end of the eighties and in response to an increase in the total neutrino flux in the Homestake experiment in coincidence with a solar flare, solar neutrino detectors have searched for solar flare signals. Neutrinos from the decay of mesons, which are themselves produced in collisions of accelerated protons with the solar atmosphere, would provide a novel window on the underlying...
Dr
Kenji Shinozaki
(University of Tübingen)
04/08/2015, 16:00
The Extreme Universe Space Observatory on-board the Japanese Experiment Module (JEM-EUSO) is a mission devoted to the observation of ultra-high energy cosmic rays (UHECRs) around and above the so-called Greisen-Zatseptin-Kuzimin energy at $\sim5\times10^{19}$ eV. The origin of these enigmatically energetic cosmic rays remain an open question since their discovery more than 50 years ago. Very...
Agnieszka Gil
(Siedlce University)
04/08/2015, 16:00
After the reversal of solar polarity in 2014, the Sun is now in the early declining phase of cycle 24. Soon after the polarity reversal, the galactic cosmic ray intensity, as observed, e.g., by neutron monitors at several latitudes (cut-off rigidities) depict an exceptionally large variation at the solar rotation period. This recurrence started in mid-2014 and continues until now (the first...
Dr
Francesco Fenu
(University of Torino, INFN Torino),
Naoto Sakaki
(Osaka City University), Dr
Yoshiyuki Takizawa
(RIKEN)
04/08/2015, 16:00
The energy spectrum of ultra-high energy cosmic rays (UHECRs) extends up to ~$10^{20}$ eV, but their sources have not been identified yet.
One of the reasons is the small statistics of UHECRs observed with the present ground based experiments,
Pierre Auger Observatory and Telescope Array Project.
Several projects with larger acceptance are planned to find the sources, among them JEM-EUSO...
Michael Alania
(Siedlce University)
04/08/2015, 16:00
In order to create a two dimensional time dependent relatively realistic model of galactic cosmic ray transport we have found delay time between changes of the galactic cosmic ray (GCR) intensity, on the one hand, and various parameters determined conditions in heliosphere- sunspot numbers SN , magnitude B of the interplanetary magnetic field (IMF), solar wind velocity U, variance of the...
Dr
Alexander Moiseev
(CRESST/NASA/GSFC)
04/08/2015, 16:00
The gamma-ray energy range from a few hundred keV to a few hundred MeV has remained largely unexplored, mainly due to the challenging nature of the measurements, since the pioneering, but limited, observations by COMPTEL on the Compton Gamma-Ray Observatory (1991-2000). This energy range is a transition region between thermal and nonthermal processes, and accurate measurements are critical for...
marcos López Moya
(University Complutense of Madrid)
04/08/2015, 16:00
The last 20 years have seen the development of new techniques in Astroparticle Physics providing access to the highest end of the electromagnetic spectrum. It has been shown that some sources emit photons up to energies close to 100 TeV. Yet the fluxes of these photons are incredibly low and to go higher in energy new detection techniques are needed.
A new technique that would use the new...
Marek Siluszyk
(Siedlce University)
04/08/2015, 16:00
Data of Bx, By, Bz components of the Interplanetary Magnetic Field (IMF) have been used to study a features of the IMF turbulences for two positive (A>0) and two negative (A<0) polarity epochs of solar magnetic cycles (1969-2011).
We found that the changes of the exponents vy, νz, νx of the Power Spectral Density (PSD) of the By, Bz, Bx components of the IMF show a radical alternation of the...
Dr
Carl Gilbert Pfendner
(Ohio State University (USA))
04/08/2015, 16:00
The Askaryan Radio Array (ARA) is an ultra-high energy (UHE) cosmic neutrino detector located at the South Pole. The cosmic ray flux cut off above primary energies of $10^{19.5}$ eV leads us to expect a UHE neutrino flux due to the Greisen-Zatsepin-Kuzmin (GZK) effect. The detection of these UHE cosmic neutrinos will add to the understanding of the sources and physics of UHE cosmic rays. The...
Stepan Poluianov
(University of Oulu, Finland)
04/08/2015, 16:00
The era of direct measurements of solar energetic particle (SEP) fluxes is limited to the last few decades and largely overlaps the Modern grand maximum of solar activity with unusually high solar activity. However, for many purposes it is important to know the fluxes of SEPs on much longer time scale. This can be made only using indirect proxies. Terrestrial proxy archives, such as the...
ARUNBABU Kollamparambil Paul
(Tata Institute of Fundamental Research, Mumbai, India)
04/08/2015, 16:00
Earth-directed Coronal mass ejections (CMEs) emanating from the Sun and the shock associated with it are the primary drivers of space weather disturbances. Forbush decrease precursors are advance warning of these upcoming magnetic field disturbances. GRAPES-3 tracking muon telescope which is a part of GRAPES-3 experiment located in Ooty, India, provides high statistics measurement of the muon...
Anderson Fauth
(State University of Campinas)
04/08/2015, 16:00
Muon rate variations during Forbush decreases registered by the Muonca muon detector have been studied. We discuss the Forbush events which occurred on 13 September and 22 December 2014. Since April 2014, muon telescopes located at State University of Campinas, Brazil, inside the South Atlantic Anomaly, has been recording the flux of single muons. The Muonca experiment consists of four modular...
Dr
Ivan Petukhov
(Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS)
04/08/2015, 16:00
Calculation of cosmic ray intensity in a magnetic cloud is realized. It is supposed that the magnetic cloud near the Sun has the shape of a torus segment with typical structure of the magnetic field (magnetic field rope). The magnetic cloud is located in the coronal mass ejection having distribution of movement velocity by radius. The subsequent propagation of ejection in interplanetary space...
Nicola Tomassetti
(Centre National de la Recherche Scientifique (FR))
04/08/2015, 16:00
Abundances and energy spectra of cosmic ray nuclei are being measured with high accuracy by the AMS experiment. These observations can provide tight constraints to the propagation models of galactic cosmic rays. In the view of the release of these data, I present an evaluation of the model uncertainties associated to the cross-sections for secondary production of Li-Be-B nuclei in cosmic rays....
Simon Thomas
(University College London)
04/08/2015, 16:00
Galactic cosmic ray (GCR) flux is modulated by the heliospheric magnetic field (HMF) over decadal time scales, due to long-term, global HMF variations, but also over time scales of a few hours due to structures crossing Earth such as coronal mass ejections or the heliospheric current sheet (HCS). The HCS separates the outward and inward polarities of magnetic field from the Sun and hence is a...
Maxim Pshirkov
(SAI Moscow State University)
04/08/2015, 16:00
Theories of galaxy formation predict the existence of extended gas halo around spiral galaxies. If there are 10-100 nG magnetic fields at several ten kpc distances from the galaxies, extended galactic cosmic ray (CR) haloes could also exist. Galactic CRs could interact with the tenuous hot halo gas to produce observable $\gamma$-rays. In this paper we have performed search for such a halo...
Axel Donath
(MPI for Nuclear Physics, Heidelberg),
Christoph Deil
(MPI for Nuclear Physics, Heidelberg)
04/08/2015, 16:00
In the past decade imaging atmospheric Cherenkov telescope arrays such as H.E.S.S.,
MAGIC, VERITAS, as well as the Fermi-LAT space telescope have provided us with detailed images and spectra of the gamma-ray universe for the first time. Currently the
gamma-ray community is preparing to build the next-generation Cherenkov Telecope Array (CTA),
which will be operated as an open...
Prof.
Philip Von Doetinchem
(University of Hawaii at Manoa)
04/08/2015, 16:00
The GAPS experiment is foreseen to carry out a dark matter search by measuring low-energy cosmic ray antideuterons and antiprotons with a novel detection approach. It will provide a new avenue to access a wide range of different dark matter models and masses from about 10GeV to 1TeV.
The theoretically predicted antideuteron flux resulting from secondary interactions of primary cosmic rays...
Mikhail Krainev
(Lebedev Physical Institute, Moscow, Russia)
04/08/2015, 16:00
Recently the maximum phase of the current solar cycle (SC) 24, in many relations anomalous when compared with solar cycles of the second half of the 20-th century, came to the end. The corresponding phase in the GCR intensity cycle is also in progress.
In this paper we study different aspects of the sunspot and GCR behavior around this phase. First, the amplitudes of the SC 24 in the solar...
Jacek Szabelski
(National Centre for Nuclear Research)
04/08/2015, 16:00
In low background underground laboratories neutrons create important background in experiments searching for very rare events. These neutrons might origin from incoherent radioactive decays or large number of neutrons might be produced in coherent way in muon induced cascades. Neutrons produced in muon cascades might have significantly larger energies than those from radioactive sources. We...
Michael Karus
(Karlsruhe Institute of Technology)
04/08/2015, 16:00
In order to unveil the mystery of ultra-high energy cosmic rays (UHECRs), JEM-EUSO (Extreme Universe Space Observatory on-board Japanese Experiment Module) will observe extensive air showers induced by UHECRs from the International Space Station (ISS) orbit with a huge acceptance. The telescope will consist of Fresnel optics and a focal surface detector with 5,000 multi-anode photomultiplier...
Dr
Christoph Deil
(MPI for Nuclear Physics, Heidelberg)
04/08/2015, 16:00
Collaborations managing Cherenkov telescope arrays (presently H.E.S.S., VERITAS,
and MAGIC) own their data and software in private servers, only accessible to
their members. However, the upcoming Cherenkov Telescope Array (CTA) will
operate as an observatory, calling for powerful high-level science tools usable
by the whole astronomical community.
We report on the efforts within the...
Dr
Robert Parsons
(Max Planck Institute for Nuclear Physics)
04/08/2015, 16:00
The H.E.S.S. VHE gamma-ray telescope has added a fifth telescope of 600 m^2 mirror area to the centre of the 4 existing telescopes, lowering its energy threshold to the sub-100 GeV range and becoming the first operational IACT array using multiple telescope designs. In order to properly access this low energy range however, some adaptation must be made to the existing event analysis.
We...
Mario Nicola Mazziotta
(Universita e INFN, Bari (IT))
04/08/2015, 16:00
The measured fluxes of secondary particles produced by the interactions of cosmic rays with the astronomical environment are often used to infer some of their properties. In this work we investigate the production of secondary particles in inelastic hadronic interactions between several cosmic rays species of projectiles and different target nuclei of the interstellar medium. The yields of...
Bruno Khelifi
(APC, IN2P3/CNRS)
04/08/2015, 16:00
The H.E.S.S. (High Energy Stereoscopic System) experiment is dedicated to the observation of very high energy gamma-rays using the Imaging Atmospheric Cherenkov Technique. Since 2012, the array of 4 telescopes of 12m diameter (CT1-4) is functioning with a fifth telescope, CT5, of 23m diameter. The full array allows now to observe gamma-rays down to few tens of GeV. With this hybrid array of...
Alain Delbart
(CEA/IRFU,Centre d'etude de Saclay Gif-sur-Yvette (FR))
04/08/2015, 16:00
Gamma-ray astronomy allows us to explore the non-thermal emissions and magnetic field configuration of objects such as Active Galactic Nuclei (AGN), Gamma Ray Bursts (GRB) and pulsars.
Presently, there is a sensitivity gap for gamma rays between 1 MeV and 100 MeV.
Additionally, there is no polarisation measurement above 1 MeV, although such a measurement could shed light on emission...
Barbara Patricelli
(University of Pisa and INFN Pisa)
04/08/2015, 16:00
Second-generation gravitational interferometers, such as Advanced LIGO and Advanced Virgo, will soon reach sensitivities sufficient to detect gravitational waves directly for the first time and open a new era in the multi-messenger investigations of the cosmos. The most violent and energetic astrophysical phenomena, including the mergers of compact objects or the core collapse of massive...
Daniel Nieto Castano
(Columbia University)
04/08/2015, 16:00
The distribution of dark matter in the Galaxy, according to state-of-the-art simulations, shows not only a smooth halo component but also a rich substructure where a hierarchy of dark matter subhalos of different masses is found. We present a search for potential dark matter subhalos in our Galaxy exploiting the high (HE, 100 MeV -- 100 GeV) and very-high-energy (VHE, >100 GeV) gamma-ray...
Igor Yashin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
04/08/2015, 16:00
The key advantage of the TAIGA gamma-ray observatory is a hybrid operation of wide-angle and narrow-angle detectors of the Tunka-HiSCORE and Tunka-IACT. The first IACT telescope of TAIGA project is under construction. The reflector of the telescope will have area of 10 m2 and a focus of 4.75 m. Imaging camera consists of about 540 PMT-based pixels with 0.36 degree field of view. Total FOV...
Maria Rodriguez Frias
(Space and Astroparticle Group UAH Madrid)
04/08/2015, 16:00
The JEM-EUSO Atmospheric Monitoring System (AMS) consists of a bi-spectral Infrared Camera and a LIDAR device that are being fully designed under space qualification to fulfil the scientific requirements of this space mission. An understanding of the atmospheric conditions in the Field of View (FoV) of the telescope is mandatory for a space-based mission which aims to detect Ultra-High Energy...
Dr
Francois Brun
(CEA-Saclay)
04/08/2015, 16:00
Imaging Atmospheric Cherenkov Telescopes (IACTs), with their high sensitivity and large field-of-views, are ideal instruments to study the universe in VHE $\gamma$-rays. IACTs image Cherenkov light emitted by $\gamma$-rays from induced particle cascades, developing in the atmosphere. The sensitivity of the IACTs depends critically on their capability to reduce the background caused by the much...
Christoph Tönnis
(Universitat de Valencia)
04/08/2015, 16:00
The ANTARES neutrino telescope is a water Cherenkov detector and currently the largest operating neutrino telescope in the Northern Hemisphere. One of the main scientific goals of ANTARES is the indirect search for dark matter, as the Weakly Interacting Massive Particle (WIMP). WIMPs could scatter on normal matter and therefore be gravitational bound in massive astronomical objects like the...
Nicola Tomassetti
(Centre National de la Recherche Scientifique (FR))
04/08/2015, 16:00
The AMS Collaboration has recently released precision data on cosmic ray (CR) leptons and protons at high energies. Interesting progresses have also been made on the measurement of CR nuclei, such as the boron-to-carbon ratio or the lithium spectrum, up to ~ TeV/nucleon energies. In order to provide a description these data, I consider a diffusion model of CR propagation which allows for...
Imen Al Samarai,
Olivier Deligny
(CNRS/IN2P3)
04/08/2015, 16:00
A potential detection technique of ultra-high energy cosmic rays would be the use of the molecular Bremsstrahlung radiation emitted by low-energy electrons left after the passage of the showers in the atmosphere. The emission mechanism is expected from quasi-elastic collisions of electrons produced in the shower by the ionisation of the molecules in the atmosphere. Given the low energy of the...
Mr
Alejandro Guzman
(Institute of Astronomy and Astrophysics, University of Tübingen)
04/08/2015, 16:00
Cosmic rays with energies exceeding $10^{18}$ eV, usually defined as Ultra High Energy Cosmic Rays (UHECRs), allow the possibility to study physics at energies well beyond man made accelerators. State of the art UHECR detectors have reached unprecedented exposures and have pioneered the field of Extreme Energy Cosmic Rays (EECR), cosmic rays with energies exceeding $5\times 10^{19}$eV. The...
Veronique Van Elewyck
(APC, Universite Paris Diderot)
04/08/2015, 16:00
Cataclysmic cosmic events can be plausible sources of both gravitational waves (GW) and high energy neutrinos (HEN), alternative cosmic messengers carrying information from the innermost regions of the astrophysical engines. Possible sources include long and short gamma-ray bursts (GRBs) but also low-luminosity or choked GRBs, with no or low gamma-ray emissions.
The ANTARES Neutrino...
Dr
Kajino Fumiyoshi
(Konan University)
04/08/2015, 16:00
KLYPVE is a Russian science mission to detect ultra-high energy cosmic rays (UHECRs) above 5 1019 eV. It will be attached to the Russian MRM-1 module onboard International Space Station. The K-EUSO project is a result of the joint efforts of the JEM-EUSO collaboration to improve performance of the KLYPVE mission, by employing the technologies (a corrector Fresnel lens, the Focal surface...
Javier Barrios Martí
(IFIC - CSIC)
04/08/2015, 16:00
KM3NeT is a large research infrastructure that will consist of a network of deep-sea neutrino telescopes in the Mediterranean Sea, of which the ARCA detector installed in the CapoPassero site (Italy) is optimised for studying high-energy neutrinos of cosmic origin. Thanks to its geographical location on the Northern hemisphere, KM3NeT can observe most of the Galactic Plane, including the...
Javier Barrios Martí
(IFIC - CSIC)
04/08/2015, 16:00
Motivated by an accumulation of events close to the Galactic center in the High Energy Starting Events (HESE) reported by the IceCube Collaboration, a search for point-like sources up to an extension of a few degrees in a wide region around the Galactic center has been performed using the ANTARES neutrino telescope. Different spectral indexes for the energy spectra of the sources, in addition...
Andreas Haungs
(Karlsruhe Institute of Technology),
Donghwa Kang
(Albert-Ludwigs-Universitaet Freiburg),
Zhaoyang Feng
(IHEP)
04/08/2015, 16:00
Diffuse ultra-high energy gamma radiation can arise from a variety of astrophysical sources.
Using the data collected by the KASCADE air shower array, the 90\% C.L.
upper limit to the flux of ultra-high energy gamma-rays in the primary
cosmic-ray flux is determined from 200 TeV up to 20 PeV. The upper limit
on the fraction of gamma-rays to cosmic-rays in energy range 1.5 and 3.7
PeV...
Ms
Jill Chevalier
(Laboratoire d’Annecy-le-Vieux de Physique des Particules, Université de Savoie, CNRS/IN2P3, F-74941 Annecy-le-Vieux, France)
04/08/2015, 16:00
Time variability of the photon flux is a known feature of AGN and in particular of blazars. The high frequency peaked BL Lac object PKS 2155-304 is one of the brightest source in the TeV band and has been monitored regularly with different instruments and in particular with the H.E.S.S. experiment above 200 GeV for more than 11 years. These data together with the observations of other...
Sergio Dasso
(IAFE - CONICET - UBA)
04/08/2015, 16:00
The low energy modes of the Surface Detector array of the Pierre Auger Observatory record variations in the flux of low energy secondary particles with extreme detail. In these modes, the rate of signals above a very low threshold (scalers) and the calibration charge histograms of the individual pulses detected by each water-Cherenkov detector are used. Previous work has studied the flux of...
David Kieda
(University of Utah)
04/08/2015, 16:00
One of the most enigmatic TeV binary systems, LS I +61 303 exhibits a high degree of modulation from optical to TeV over a single orbit of ~26.5 days. LS I +61 303 also exhibits a ~4.5 year modulation in radio, X-Ray and GeV emission which is yet to be seen in TeV gamma rays. LS I +61 303 has been observed by both VERITAS (85 GeV-30 TeV) and multi-wavelength partners (optical - GeV). The...
Yutaka Ohira
(Aoyama Gakuin University)
04/08/2015, 16:00
The interstellar medium and ejecta of supernova are not always completely ionized. Such partially ionized plasmas are though to be unsuitable for cosmic ray acceleration. In order to study shock structures of collisionless shocks in partially ionized plasmas, we perform two-dimensional hybrid simulations. We find that large density fluctuations and large magnetic fields fluctuations are...
PRAVATA KUMAR MOHANTY
(Tata Institute of Fundamental Research, Mumbai, India)
04/08/2015, 16:00
Harmonics in the cosmic ray solar diurnal anisotropy up to third have been
experimentally observed. Very high statistics is required to investigate
higher harmonics because of exceedingly small amplitudes. The GRAPES-3
experiment located in Ooty, India contains a large area (560~m$^2$) tracking
muon telescope that provides a high statistical record of the muon flux
($\sim$4$\times 10^9$...
Dr
Marco Ricci
(INFN, Laboratori Nazionali di Frascati, Frascati (Roma), Italy)
04/08/2015, 16:00
For any experiment aiming at the observation of Ultra High Energy Cosmic Rays (UHECR's) from space, one key measurement is related to the UV background produced in Earth atmosphere. In view of the planned missions (KLYPVE/K-EUSO, JEM-EUSO) at the International Space Station (ISS), a small, compact UV telescope, Mini-EUSO, is being developed by the JEM-EUSO International Collaboration to be...
Rendani Nndanganeni
(North-West University (Potchefstroom campus) South Africa)
04/08/2015, 16:00
The challenge regarding the modeling of the solar modulation of Jovian electrons lies in determining a reasonable source function which on its part influences the energy range where these particles dominate in the heliosphere. Another controversial issue is what the spectral index of these electrons should be, from the lowest to the highest energies of relevance to solar modulation. If this...
Dr
Serkan Golge
(Space Radiation Analysis Group, NASA Johnson Space Center, Houston, TX, USA)
04/08/2015, 16:00
The Badhwar-O'Neill (BON) Galactic Cosmic Ray (GCR) flux model is used by NASA to certify microelectronic systems and in the analysis of radiation health risks for human space flight missions. Of special interest to NASA is the kinetic energy region below 4.0 GeV/n due to the fact that exposure from GCR behind shielding (e.g. inside a space vehicle) is heavily influenced by the GCR particles...
Mr
Ibrahim Daniel Torres Aguilar
(HAWC),
Tomás Capistrán
(INAOE)
04/08/2015, 16:00
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is located at an altitude of 4100 meters in Sierra Negra, Puebla, Mexico. HAWC is an air shower array of 300 water Cherenkov detectors (WCDs), each with 4 photomultiplier tubes (PMTs). Because the observatory is sensitive to air showers produced by cosmic rays and gamma rays, one of the main tasks in the analysis of gamma-ray...
Simon Mackovjak
(ISDC - Data Centre for Astrophysics, Astronomy Department, University of Geneva, Switzerland)
04/08/2015, 16:00
Precise characterization of the Earth night side UV background is essential for observation of the ultra-high-energy cosmic ray induced extensive air showers (EAS) from the space. We have analyzed data from the flight of EUSO-Balloon pathfinder mission that took place near Timmins (Canada) in the moonless night from 24$^{th}$ to 25$^{th}$ August 2014. The EUSO-balloon telescope imaged the UV...
Prof.
H.S, Ahluwalia
(University of New Mexico)
04/08/2015, 16:00
The timeline of solar activity is discussed with data for the annual mean north-south excess (NSE) of hemispheric sunspot numbers (SSNs) for 1945-2014, covering five SSN cycles (18-23) and the rising phase of cycle 24. We report the results of our study of the relation between NSE and galactic cosmic ray (GCR) modulation at 1 a.u. The significance of our results is discussed.
Claudio Kopper
(University of Alberta),
Naoko Kurahashi Neilson
(Drexel University)
04/08/2015, 16:00
The spectrum of cosmic rays includes the most energetic particles ever observed. The mechanism of their acceleration and their sources are, however, still mostly unknown. Observing astrophysical neutrinos can help solve this problem. Because neutrinos are produced in hadronic interactions and are neither absorbed nor deflected, they will point directly back to their source. This contribution...
JANE MACGIBBON
(University of North Florida)
04/08/2015, 16:00
Many early universe theories predict the creation of Primordial Black Holes (PBHs). PBHs could have masses ranging from the Planck mass to 10^5 solar masses or higher depending on the size of the universe at formation. Due to quantum-gravitational effects, a black hole is expected to have a temperature which is inversely proportional to its mass. Hence a sufficiently small black hole will...
Christoph Deil
(MPI for Nuclear Physics, Heidelberg)
04/08/2015, 16:00
The Cherenkov Telescope Array (CTA), a ground-based facility for very-high-energy (VHE) gamma-ray astronomy, will operate as an open observatory serving a wide scientific community to explore and to study the non-thermal universe. Open community access is a novelty in this domain, putting a challenge on the implementation of services that make VHE gamma-ray astronomy as accessible as any other...
Renat Sibatov
(Ulyanovsk State University)
04/08/2015, 16:00
One of the hypotheses about nature of ultra-high energetic tails of cosmic ray (CR) spectrum assumes extragalactic origin. Intergalactic CRs includes particles both emitted and reflected by galaxies. The particles entering and leaving galaxies undergo additional acceleration depending on the time spent there. One can assume, that such particles participate, at least partially, in forming the...
Jakub Vicha
(Acad. of Sciences of the Czech Rep. (CZ))
04/08/2015, 16:00
The mass composition of ultra-high energy cosmic rays can be studied from the distributions of the depth of shower maximum and/or of the muon shower size. We study the dependence of the mean muon shower size on the depth of shower maximum in more details. Air showers induced by four different primaries were simulated with two models of hadronic interactions already tuned with LHC data. The...
Prof.
OLEG DALKAROV
(P.N.Lebedev Physical Institute)
04/08/2015, 16:00
A study of gravitational properties of matter and a precision test of Weak Equivalence Principal (WEP) presents a fundamental interest. We have shown the possibility of investigation of quantum gravitational states of matter by the example of helium atom. We examined the capability of the existence of helium quantum states in the gravitational field of a cold neutron star. Observation of such...
Mikhail Krainev
(Lebedev Physical Institute, Moscow, Russia)
04/08/2015, 16:00
Quasi-biennial oscillation (QBO) is a well-known quasi-periodical variation with characteristic time 0.5-4 years in different solar, heliospheric and cosmic ray characteristics. Recently it has been shown that there is rather high anticorrelation between the QBOs in GCR intensity near the Earth and in the strength of the heliospheric magnetic field. Besides, it was suggested that both...
Prof.
Jing Huang
(Institute of High Energy Physics, CAS), Dr
Ying Zhang
(Institute of High Energy Physics)
04/08/2015, 16:00
CR spectrum may be not expressed by a simple power law in a certain energy region. Recently, PAMELA, ATIC and CREAM presented a rigidity dependent spectral breaks and remarkable hardening after the breaks in the rigidity region above about 100 GV. On the other hand, the all-particle energy spectrum of primary cosmic rays observed in a wide range from 10^14 to 10^17 eV with the Tibet-III AS...
Mr
Christopher Bochenek
(University of Chicago)
04/08/2015, 16:00
It is well known that, for bright gamma-ray pulsars with high statistics above a few GeV, the phase averaged spectral energy distribution (SED) is harder than a simple exponential cutoff above the break. We perform phase-resolved spectral analyses of bright gamma-ray pulsars and demonstrate that, even over narrow phase ranges, the SEDs of gamma-ray pulsars above the break energy are harder...
Blahoslav Pastirčák
(Institute of Experimental Physics SAS, Košice, Slovakia)
04/08/2015, 16:00
JEM-EUSO experiment will observe UV light created by extensive air showers initiated by ultra high energy cosmic rays (UHECR). Reconstruction of UHECR particle direction from detected signal depends also on the level of signal background, which can vary in time and with location.
We developed an alternative pattern recognition (PR) method based on Hough transformation besides
to existing...
Prof.
Anatoly Petrukhin
(National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))
04/08/2015, 16:00
EAS investigation is the only way to obtain information about PCR energy spectrum and composition above the knee. Usually it is assumed that primary particle energy is equal to EAS energy, which is evaluated from measured EAS parameters. At that, it is also assumed that interaction model at such energies is known as a continuation of models verified at accelerator energies. Therefore it is...
Mr
camille catalano
(irap)
04/08/2015, 16:00
EUSO-BALLOON is a prototype of the JEM-EUSO detector, to perform an end-to-end test of the subsystems and components, and to prove the entire detection chain and measure the atmospheric and terrestrial UV background. In August 2014, the instrument was launched in collaboration with the French Space Agency CNES for its maiden flight.
This article describes the optics of EUSO-BALLOON,...
Jose Luis Sánchez
(University of León),
Maria Rodriguez Frias
(Space and Astroparticle Group UAH Madrid)
04/08/2015, 16:00
The EUSO-balloon, pathfinder for the JEM-EUSO Space Mission, was launched during the night of August 24, 2014. The main aim of the flight was to test all the technologies developed for JEM-EUSO under very severe operating conditions (Stratosphere ~ 40 km altitude), partly representative of the working conditions in ISS. The IR camera onboard EUSO-Balloon is used to obtain the Cloud Top Height...
Alessio Porcelli
(Universite de Geneve (CH))
04/08/2015, 16:00
The single mirror small-size telescope (SST-1M) is one of the telescope projects being proposed for the Cherenkov Telescope Array (CTA) observatory by a sub-consortium of Polish and Swiss institutions. The SST-1M prototype structure is currently being constructed at the Institute of Nuclear Physics in Cracow, Poland, while the camera will be assembled at the University of Geneva, Switzerland....
nahee park
(University of Chicago)
04/08/2015, 16:00
VERITAS is a ground-based gamma-ray instrument operating at the Fred Lawrence Whipple Observatory in southern Arizona. With an array of four imaging atmospheric Cherenkov technique (IACT) telescopes, VERITAS is designed to measure gamma rays between ~85 GeV and ~30 TeV with a sensitivity to detect a point source with a flux of 1% of the Crab nebula flux within 25 hours. Since its first light...
Dr
Giovanni Lamanna
(Centre National de la Recherche Scientifique (FR))
04/08/2015, 16:00
The most massive stars appear grouped in giant molecular clouds. Their strong wind activity generates large structures known as super bubbles and induces collective effects which could accelerate particles up to the high energy and produce gamma-rays. The best objects to observe these effects are young massive star clusters in which no supernova explosion has occurred yet. Such star...
1075.
Photoelectron counting rate measurements in the UV camera during the EUSO-BALLOON night flight
Julio Arturo Rabanal Reina
(LAL/IN2P3/CNRS)
04/08/2015, 16:00
EUSO-Balloon is a prototype for the future space telescope JEM-EUSO aiming to detect UV emissions in the Earth's atmosphere (cosmic air showers, meteorites, airglow, etc). It successfully completed its first flight operated by the CNES over Ontario, Canada, in August 2014. One of the main goals is to measure the photoelectron rate performed by its UV camera. These measurements, corrected from...
Mario Bertaina
(Univ. & INFN Torino)
04/08/2015, 16:00
EUSO-Balloon is a pathfinder mission for JEM-EUSO
with main objective to perform a full scale end-to-end test of all the key technologies and instrumentation of JEM-EUSO detectors, as well as a detailed and precise measurement of the UV background in different atmospheric and ground conditions, and a first measurement of air shower tracks from the edge of space. For its first flight,...
Alexandre Marcowith
(LUPM Université Montpellier)
04/08/2015, 16:00
John Pretz
(Pennsylvania State University)
04/08/2015, 16:00
Isotropic diffuse gamma-ray emission above 100 GeV is produced by unresolved extragalactic objects such as active galactic nuclei, as well as source of truly diffuse emission such as the electromagnetic cascades produced by very high energy gamma rays and cosmic rays. Isotropic diffuse gamma-ray emission has been observed up to nearly 1 TeV. An Observation or limit above this energy can...
Dr
Akira Okumura
(Solar-Terrestrial Environment Laboratory, Nagoya University)
04/08/2015, 16:00
Reflective light concentrators with hexagonal entrance and exit apertures are frequently used at the focal planes of gamma-ray telescopes in order to reduce their dead area caused by the geometries of the photodetectors, as well as to reduce stray light entering at large incident angles. The focal planes of the Large-Sized Telescopes (LSTs) of the Cherenkov Telescope Array (CTA) will also be...
Jan Luenemann
(Vrije Universiteit Brussel)
04/08/2015, 16:00
In high energy physics many background dominated analyses suffer from limited statistics in simulation: With increasing efficiency of the event selection the simulated samples are reduced so that in many cases the event number at final analysis level is very low. Due to limited computational resources the production of more simulation is not always feasible. In this cases it is helpful to...
David Ruffolo
(Mahidol University)
04/08/2015, 16:00
Nonlinear guiding center (NLGC) theory has been used to explain the asymptotic perpendicular diffusion coefficient
κ⊥ of energetic charged particles in a turbulent magnetic field, which can be applied to better understand cosmic
ray transport. Here we re-derive NLGC, replacing the assumption of diffusive decorrelation with random ballistic
decorrelation (RBD), which yields an explicit...
Mr
Volker Baum
(Johannes Gutenberg-Universität Mainz)
04/08/2015, 16:00
With a lattice of 5160 photomultiplier tubes, IceCube monitors one cubic kilometer of deep Antarctic ice in order to detect neutrinos via the Cherenkov photons emitted by charged secondaries arising from their interactions in matter. Due to subfreezing ice temperatures, the photomultipliers’ dark noise rates are particularly low. Therefore a collective rate enhancement introduced by...
ARUNBABU Kollamparambil Paul
(Tata Institute of Fundamental Research, Mumbai, India)
04/08/2015, 16:00
The relation between the Forbush decreases (FDs) and near-Earth interplanetary magnetic field (IMF) enhancements associated with the solar coronal mass ejections (CMEs) is studied. We have used data from GRAPES-3 tracking muon telescope to identify the Forbush decrease events. We have chosen events that are having a reasonably clean profile, and magnitude $>$ 0.25 %. We have used IMF data from...
Dr
Ivan Gnesi
(Centro "E. Fermi", INFN, University of Turin)
04/08/2015, 16:00
The monitoring of galactic cosmic ray flux decreases is of interest for the understanding of phenomena that occur on the solar corona, as well as on other observable stars. As it is known, they are related to the emission of mass from the star corona and often related to solar flares, even if such relation is not completely understood.
The effect on the solar wind directly affects the...
Helena Kruger
(North-West University, Potchefstroom)
04/08/2015, 16:00
The propagation of cosmic rays through the heliosphere is subjected to modulation. This propagation can be described by the Parker Transport Equation. Two simple approximations of this equation are the convection-diffusion and the force-field approaches. The solutions of these equations contain the modulation parameter M and the modulation potential ϕ, respectively. Usoskin et al. (2011) used...
Prof.
Hiroshi Kojima
(Aichi Institute of Technology, Waterloo Road, Aichi, Japan)
04/08/2015, 16:00
For the investigation of the interactions of galactic cosmic rays with the solar wind plasma and/or interplanetary magnetic field, it is important to know the rigidity dependence of the intensity variations of galactic cosmic rays in detail. In this paper, we have divided the data into two durations of active and calm by a criteria which is based on the data of neutron monitor of the lowest...
Steffen Hallmann
(ECAP - Univ. Erlangen)
04/08/2015, 16:00
The ANTARES neutrino telescope, taking data in its final configuration since 2008 at the bottom of the Mediterranean Sea, has since then contributed to the seaches for high-energy neutrino sources. ANTARES has also been able to set constraints on the cosmic neutrino flux.
The ANTARES sensitivity for a diffuse neutrino flux with six years of data taking is close to the level of the cosmic...
Moritz Hütten
(DESY and Humboldt-Universität Berlin)
04/08/2015, 16:00
Weakly interacting, massive dark matter particles are expected to self-annihilate or decay into high-energy photons, which thereby establish the possibility for indirect detection by gamma-ray telescopes. For probing the dark matter annihilation products, accurate knowledge of the dark matter density distributions is crucial. However, major uncertainties exist in the density profiles of our...
Dr
Donghwa Kang
(Karlsruhe Institute of Technology, Germany)
04/08/2015, 16:00
Extensive air showers with primary energies around 300 TeV were measured with a large detector array and a muon tracking detector of KASCADE. Using all events in the full KASCADE data set, a search of a pointlike source of high-energy cosmic rays for the northern hemisphere are performed. In addition, a subset of muonless events, i.e., extensive air showers which are more similar to gamma ray...
Gabriela Emilia Pavalas
(Institute for Space Sciences)
04/08/2015, 16:00
Magnetic monopoles are hypothetical particles predicted to be created in the early Universe in the framework of Grand Unified Theories (GUTs). The signature of the passage of magnetic monopoles in a Cherenkov telescope like ANTARES (Astronomy with a Neutrino Telescope and Abyss environmental RESearch) is expected to be evident and unambiguous, because of the large amount of light emitted...
Sandro Kopper
(BU Wuppertal)
04/08/2015, 16:00
Physics theories beyond the Standard Model like Supersymmetry
and models with extra dimensions often invoke $\mathbb{Z}_2$-symmetries in order to avoid new couplings that lead to unobserved new physics like unnaturally fast proton decay. This gives rise to the possibility of heavy, new particles being produced in pairs with the lightest of them being (meta-) stable.
Thus, under favorable...
Chiara Perrina
("La Sapienza" University of Roma & INFN)
04/08/2015, 16:00
Installed in the Mediterranean Sea, at a depth of $\sim 2.5$ km, ANTARES is the largest undersea neutrino telescope currently operating. Point source searches with neutrino telescopes are normally limited to a fraction of the sky, due to the selection of events where the direction of the neutrino candidate has been reconstructed as coming from below the horizon, usually referred to as...
Mr
Avery Archer
(Washington University in St. Louis)
04/08/2015, 16:00
Since the 2011 VERITAS discovery of very high energy emission (VHE; E>100 GeV) from the Crab pulsar, there has been concerted effort by the gamma-ray astrophysics community to detect other pulsars in the VHE band in order to place better constraints on emission models. Pulsar modeling demonstrates that much of the magnetosphere is opaque to very high energy photons, limiting emission regions...
Ms
Aera JUNG
(AstroParticule et Cosmologie, Univ. Paris Diderot, CNRS/IN2P3, Paris, France)
04/08/2015, 16:00
The balloon borne experiment, EUSO-Balloon, recorded data to measure the UV background during a moonless night, from an altitude of ~40 km in the nadir direction, with a field of view of ±6deg. In this paper, we investigate the sensitivity of the instrument to coherent fluctuations of this background over areas from ~ $1km^{2}$ up to the entire field of view, on timescales ranging from a few...
Ms
Meike De With
(Deutsches Elektronen-Synchrotron (DE))
04/08/2015, 16:00
In many models, the self-annihilation of dark matter particles will create neutrinos which can be detected on Earth. An excess flux of these neutrinos is expected from regions of increased dark matter density, like (dwarf) galaxies and galaxy clusters. The IceCube neutrino observatory, a cubic-kilometer neutrino detector at the South Pole, is capable of detecting neutrinos down to energies of...
Dr
César Alvarez
(Facultad de Ciencias en Física y Matemáticas, Universidad Autonóma de Chiapas, México.)
04/08/2015, 16:00
There are currently over 150 known gamma-ray pulsars. While most of them are detected only from space, at least two are now seen also from the ground. MAGIC and VERITAS have measured the gamma ray pulsed emission of the Crab pulsar up to hundreds of GeV and more recently MAGIC has reported > 1TeV emission. Furthermore, in the southern hemisphere, H.E.S.S. has detected the Vela pulsar above 30...
JANE MACGIBBON
(University of North Florida)
04/08/2015, 16:00
Primordial Black Holes (PBHs) are gravitationally collapsed objects that may have been created in the early universe and could have arbitrarily small masses down to the Planck scale. Due to quantum gravitational effects, it is believed that a black hole has a temperature inversely proportional to its mass and will emit all species of fundamental particles thermally. PBHs with initial masses of...
Prof.
Ding Chen
(National Astronomical Observatories, CAS), Prof.
Jing Huang
(Institute of High Energy Physics, CAS), Dr
L.M. Zhai
(Institute of High Energy Physics, CAS), Prof.
M. Shibata
(Facullty of Engineering, Yohohama National University, Yokohama 240-8501, Japan), Dr
Y. Katayose
(Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan)
04/08/2015, 16:00
A new hybrid detector system has been constructed by the Tibet ASgamma collaboration in Tibet, China, since 2014 to measure the chemical composition of cosmic rays in the wide energy range including the knee. The new detector system consists of an AS-core detector-grid (YAC-II) to detect a bundle of high-energy shower particles, the Tibet-III AS array and a MD cluster (large underground...
Prof.
Ding Chen
(National Astronomical Observatories, CAS), Prof.
Jing Huang
(Institute of High Energy Physics, CAS), Prof.
M. Shibata
(Faculty of Engineering, Yokohama National University, Yokohama.), Dr
Xu Chen
(Institute of High Energy Physics,)
04/08/2015, 16:00
The rapidly declining electron flux with the power index of ~3.3 makes it difficult to measure directly with instruments on board balloons and satellites at high energies higher than about 1 TeV. However, the large-area and wide-field EAS arrays could be used to extend cosmic-ray electron spectrum (e+ + e-) measurements up to about 10 TeV or more. The newly upgraded Tibet hybrid AS experiment...
Dr
Alessio Porcelli
(Universite de Geneve (CH))
04/08/2015, 16:00
The Small-Size Telescopes with single-mirror (SST-1M) is 4 m Davies-Cotton telescope and is among the proposed designs for the Cherenkov Telescope Array (CTA). It is conceived to provide the high-energy ($>$ few TeV) coverage. The SST-1M comprises proven technology for the telescope structure and innovative electronics and photosensors for the camera. Its design is meant to be simple,...
Prof.
Jacek Niemiec
(Institute of Nuclear Physics PAN, Krakow, Poland)
04/08/2015, 16:00
The nonresonant cosmic-ray-current-driven instability that operates in the precursors of shocks in young supernova remnants may be responsible for magnetic-field amplification, quasithermal plasma heating, and hydrodynamical turbulence, all of which have impact on the shock properties and particle-acceleration processes. The temporal and spatial development of the instability is investigated...
Dr
Alisson Dal Lago
(National Institute for Space Research)
04/08/2015, 16:00
It is well known that cosmic rays with energies below 100 GeV are significantly modulated by solar wind structures populating the heliosphere, which originate at the Sun. We apply a cross wavelet transform and wavelet coherence for examining relationships in time frequency space between isotropic and anisotropic components of cosmic rays data from the Global Muons Detectors Network (GMDN) and...
Agnieszka Gil
(Siedlce University)
04/08/2015, 16:00
We study temporal changes of a behaviour of the power-law rigidity spectrum of the first three harmonics of the 27-day variation of the galactic cosmic rays (GCR) intensity during the solar cycle (SC) no. 24 and compare with other 11-year cycles of solar activity. We show that our recent finding - a hard spectrum of the amplitudes of the 27-day variation of the GCR intensity in maximum epochs...
Prof.
Ramanath Cowsik
(Department of Physics and McDonnell Center for the Space Sciences Washington University, St. Louis, MO 63130)
04/08/2015, 16:00
In this paper we note that the spectral intensities of antiprotons observed in Galactic cosmic rays in the energy range ~1-100 GeV by BESS and PAMELA instruments display nearly the same spectral shape as that generated by primary cosmic rays through their interaction with matter in the interstellar medium, without any significant modifications. More importantly, a constant residence time of...
Prof.
INOUE Naoya
(Graduate School of Science and Enginnering, SAITAMA University)
04/08/2015, 16:00
The arrival time distributions of extensive air shower (EAS) secondary particles have been studied in an energy region, E > 10^18eV with the data collected by the Telescope Array scintillator detector array. We present the average shapes of time profiles in ranges of primary particle energy, zenith angle, and core distance. This is a phenomenological study of extensive air shower longitudinal...
Alexander Ziegler
(ECAP, University of Erlangen-Nuremberg, Germany)
04/08/2015, 16:00
Current arrays of Imaging Atmospheric Cherenkov Telescopes (IACTs) routinely achieve an astrometric point-source location accuracy of 20-30 seconds of arc (given large photon statistics), which is well below the angular resolution obtained for individual photons. The location accuracy is mainly limited by systematic uncertainties due to possible deformations of the telescopes’ structures,...
Tomasz Seredyn
(Polish Air Force Academy)
04/08/2015, 16:00
In the paper we statistically inspect Forbush decreases, CMEs, Solar Flares and geomagnetic variations during the solar cycle 24 and compare them with earlier cycles and discuss Sun-Earth system response to extreme solar events and space weather. Data from different spacecrafts, GOES X-ray and LASCO coronograph images were used together with neutron monitor network recordings. The observed...
Dr
Zbigniew Kobylinski
(Polish Air Force Academy)
04/08/2015, 16:00
Energetic charged particles of galactic cosmic rays (GCR) and in a extent stronger energetic
solar particles penetrate more or less deep into lower atmosphere ionizing the air and affect onto
the value and distribution of electric conductivity, the electric field and other atmospheric electric parameters. The response of the atmospheric electric field (AEF) at ground level to the GCR...
Abdullrahman Maghrabi
(King Abdulaziz City For Science and Technology)
04/08/2015, 16:00
Forbush decreases are one of the most important cosmic ray time variations observed by ground level monitors and on board space detectors. They mainly occur during the active phases of the solar cycle, and associated with geomagnetic storms caused by solar flares or coronal mass ejections. Experimental studies of Forbush decreases have shown distinct properties. These properties are important...
Huihai He
(Institute of High Energy Physics, CAS)
04/08/2015, 16:00
Prof.
Yoshida Kenji
(Shibaura Institute of Technology)
04/08/2015, 16:00
Symmetric and triangle-shaped flux variability in X-ray and gamma-ray light curves has been observed in many blazars. A statistical study of X-ray and gamma-ray variability in blazars suggests that the rise time of flares are nearly equal to the decay time on the average. It is usually believed that the X-ray emission of many blazars arises as synchrotron emission of electrons accelerated at a...
Amanda Weinstein
(Iowa State University)
04/08/2015, 16:00
The process of gathering and associating data from multiple sensors or sub-detectors due to a common physical event (the process of event-building) is used in many fields, including high-energy physics and gamma-ray astronomy. The problem of fault tolerance in event-building is a difficult one, and one that becomes increasingly difficult with higher data throughput rates and increasing numbers...
Dr
Francesco Fenu
(University of Torino - INFN Torino)
04/08/2015, 16:00
EUSO--Balloon successfully flew on August 2014 from Timmins (Ontario, Canada). Its focal surface was an array of 36 MAPMTs, 64 pixels each, for a total of 2304 channels. During its 5 hours flight at float altitude of about 40 km it routinely recorded sequences of 128 consecutive 2.5 $\mu$s long snapshots (GTUs) of the luminous conditions in its field of view ($\sim$ 64 $km^{2}$) with a...
Dr
Thomas Mernik
(Institute for Astronomy and Astrophysics, University of Tübingen)
04/08/2015, 16:00
The Extreme Universe Observatory onboard the Japanese Experiment Module (JEM-EUSO) is a mission being developed to observe ultra high energy cosmic rays (UHECRs) from space.
JEM-EUSO consists of a wide field of view UV-telescope, assisted by an atmospheric monitoring system, designed to be mounted oboard the International Space Station.
JEM-EUSO will observe the extensive air showers (EAS)...
Prof.
Antonio Codino
(University of Perugia and INFN)
04/08/2015, 16:00
Measurements of the energy spectra of 11 nuclear species by the TRACER experiment in the energy band $10^{11}$ - $5 \times 10^{14}$ $eV$ result in a constant, common spectral index of 2.67 $\pm$ 0.05. A similar figure has been reported by the CREAM experiment for Helium and Proton spectra in the same energy band. This index is equal within error bars with that of the all-particle spectrum...
Andrii Neronov
(University of Geneva),
Maria Rodriguez Frias
(Space and Astroparticle Group UAH Madrid)
04/08/2015, 16:00
An Atmospheric Monitoring System (AMS) is a mandatory and key device of a space-based mission which aims to detect Ultra-High Energy Cosmic Rays (UHECR) and Extremely-High Energy Cosmic Rays (EHECR) from Space. JEM-EUSO has a dedicated atmospheric monitoring system that plays a fundamental role in our understanding of the atmospheric conditions in the Field of View (FoV) of the space...
Dr
James Adams
(Univ. of Alabama in Huntsville)
04/08/2015, 16:00
The Extreme Universe Space Observatory (EUSO) Balloon was launched from Timmins, Ontario, Canada on the moonless night of August 24, 2014. Before the balloon reached altitude, a helicopter carrying UV flashers and a UV laser took off from Timmins and flew to the balloon. For the next 2.5 hours the helicopter circled under the balloon operating the UV flashers and a UV laser to simulate the...
Francisco Salesa Greus
(The Pennsylvania State University)
04/08/2015, 16:00
The HAWC collaboration has recently completed the construction of a gamma-ray observatory at an altitude of 4100 meters on the slope of the Sierra Negra volcano in the state of Puebla, Mexico. In order to achieve an optimal angular resolution, energy reconstruction, and cosmic-ray background suppression for the air showers observed by HAWC, it is crucial to obtain good timing and charge...
Mr
Johannes Marquardt
(CAU-Kiel, Germany)
04/08/2015, 16:00
Helios 1 and 2 were launched in December 1974 and January 1976, respectively. They both explored the inner heliosphere to distances of less than 0.3 AU from the Sun. The University of Kiel experiment on board the solar probe Helios measured high energy charged cosmic ray particles of solar, planetary and galactic origin. The cosmic ray telescope consists out of five semiconductor detectors,...
Dr
Giuseppe Osteria
(Istituto Nazionale di Fisica Nucleare - Sezione di Napoli, Italy), Dr
Valentina Scotti
(Istituto Nazionale di Fisica Nucleare - Sezione di Napoli, Italy)
04/08/2015, 16:00
The EUSO-Balloon experiment is a pathfinder mission for JEM-EUSO which has as its main objective an end-to-end test of all the key technologies and instrumentation of JEM-EUSO detectors.
The instrument is a telescope of smaller dimension with respect to the one designed for the ISS, it is mounted in an unpressurized gondola of a stratospheric balloon. It was launched during the CNES flight...
Antonio Codino
(University of Perugia and INFN)
04/08/2015, 16:00
The cosmic-ray abundances are compared to those of the quiescent matter referred to as galactic or solar abundances. Cosmic-ray and Galactic abundances are normalized to Iron.
The comparison takes advantage of the recent data of the energy spectra of the cosmic nuclei in the interval $3 \times 10^{10}$ - $ 5 \times 10^{14}$ $eV$ and the observation of a constant spectral index of 2.67...
99.
The effects of particle drifts on the modulation of galactic electrons in the global heliosphere
Rendani Nndanganeni
(North-West University (Potchefstroom campus) South Africa)
04/08/2015, 16:00
The fundamental process of global curvature, gradient and current sheet drifts in the heliosphere is still not fully understood, especially how solar wind and magnetic field turbulence could affect the magnitude of drifts on a global scale. General consensus is that the so-called weak scattering drifts is giving too large modulation effects as follows from the application of numerical drift...
Prof.
Rossella Caruso
(Department of Physics and Astronomy - University of Catania and INFN Section of Catania)
04/08/2015, 16:00
JEM-EUSO is a space mission devoted to the investigation of Ultra-High Energy Cosmic Rays and Neutrinos (E>5x10^19 eV), using the atmosphere as a giant detector, which is also the source of the largest fraction of noise (nightsky background). The EUSO@TurLab project is an on-going activity aiming to reproduce atmospheric and luminous conditions that JEM-EUSO will encounter on its orbits around...
Dr
Thomas Mernik
(Institute for Astronomy and Astrophysics, University of Tübingen)
04/08/2015, 16:00
JEM-EUSO (The Extreme Universe Observatory onboard the Jap\-a\-nese Experiment Module) is a space borne UV-telescope which will be mounted on the ISS (International Space
Station).
It is designed for the observation of UHECR induced extensive air showers (EAS) above an energy of $10^{19}$ eV by using the earth's atmosphere as a large detector.
Due to the amount of monitored target volume it...
Axel Donath
(Max Planck Institute for Nuclear Physics, Heidelberg),
Christoph Deil
(MPI for Nuclear Physics, Heidelberg)
04/08/2015, 16:00
We will present a high-resolution image of the H.E.S.S. Galactic plane survey with interesting sources and features highlighted. This poster is complementary to the talk "The H.E.S.S. Galactic plane survey". Come talk to us about sources of interest to you or any questions you might have how to properly use the HESS survey significance, flux and upper limit maps and source catalog in FITS...
Dr
Robert Parsons
(Max Planck Institute for Nuclear Physics)
04/08/2015, 16:00
Gamma-ray bursts (GRBs) are some of the most energetic and exotic events in the Universe, however their behaviour at the highest energies (>10 GeV) is largely unknown. Although the Fermi-LAT space telescope has detected several GRBs in this energy range, it is limited by the relatively small collection area of the instrument. The H.E.S.S. experiment has now entered its second phase by adding a...
Dr
Francesco Fenu
(University of Torino - INFN Torino)
04/08/2015, 16:00
JEM--EUSO is an international collaboration committed to the
development of space based ultra high energy cosmic ray
observatories. In this framework we are carrying out an
extensive simulation study in order to evaluate the
performances of the mission. In this contribution we focus on
the energy and $X_{max}$ reconstruction performances. We
therefore simulated several samples of cosmic...
Patrick Hunt
(Colorado School of Mines)
04/08/2015, 16:00
We describe the design and fabrication of a prototype Global Light System (GLS) laser ground station for the JEM-EUSO project. The GLS will be a network of ground-based UV LEDs and steered lasers to monitor and calibrate the JEM-EUSO cosmic ray detector planned for the International Space Station. The GLS units will generate optical signatures in the atmosphere that are comparable to tracks...
Daniel Gottschall
(Institut für Astronomie und Astrophysik Tübingen)
04/08/2015, 16:00
The High Energy Stereoscopic System (H.E.S.S.) experiment is one of the leading observatories for gamma-ray astronomy. It consists of four telescopes with a reflecting dish diameter of 12 m (CT1-4) and a newer large telescope (CT5) with a reflecting dish diameter of 28 m. On CT5 876 mirror facets are mounted, all of them equipped with a computerised system for their alignment. The design of...
Stefan Ferreira
(North-West University)
04/08/2015, 16:00
Proton observations from the PAMELA mission and a comprehensive modulation model, including a new Stochastic Differential Equation (SDE) model, are used to study the details of the modulation of cosmic rays in the inner heliosphere. Recent theoretical advances in determining the diffusion coefficients are used to compute cosmic ray intensities over the unusual last solar minimum activity...
Robert Lauer
(University of New Mexico)
04/08/2015, 16:00
Astrophysical sources are now observed by many different instruments at different wavelengths, from radio to high-energy gamma-rays, with an unprecedented quality. Putting all these data together to form a coherent view, however, is a very difficult task. Each instrument has its own data format, software and analysis procedure, which are difficult to combine. It is for example very challenging...
Antonio Codino
(University of Perugia and INFN)
04/08/2015, 16:00
The measurements of the chemical composition of the cosmic radiation in the last years above the ankle energy have modified the foundation of Cosmic Ray Physics and have simple, compelling, unambiguous interpretation: (1) high energy cosmic rays in the band $3 \times 10^{18}$ - $3 \times 10^{20}$ $eV$ do not have an extragalactic origin; (2) the cosmic nuclei above the ankle are not...
Dr
Lukas Nellen
(I. DE CIENCIAS NUCLEARES, UNAM)
04/08/2015, 16:00
The framework of relativistic quantum-field theories requires Lorentz Invariance, which among other things implies a constant velocity of light. Many theories of quantum gravity, on the other hand, include violations of Lorentz Invariance at small scales and high energies. This generates a log of interest in establishing limits on such effects, and, if possible, observe them directly. Gamma...
Dr
Marek Siluszyk
(Siedlce University, Poland), Prof.
Michael Alania
(Siedlce University, Poland), Dr
Renata Modzelewska
(Siedlce University, Poland)
04/08/2015, 16:00
The hourly neutron monitor data have been used to study the role of drift effect in the temporal changes of the diurnal anisotropy. In order to thoroughly separate sectors of the Interplanetary Magnetic Field (IMF) and its influence on the anisotropy of Galactic Cosmic Rays (GCRs) for positive (A>0) and negative (A<0) polarities of solar magnetic cycle, two periods (1995-1997 (A>0) and...
Anna O'Faolain de Bhroithe
(DESY)
04/08/2015, 16:00
In 1989, the Whipple 10m Telescope achieved the first indisputable detection of a TeV gamma-ray source, the Crab Nebula. Until its decommissioning in 2011, the Whipple Telescope took regular measurements of the nebula. With the recent discovery of GeV gamma-ray flaring activity in the Crab Nebula, it is an opportune time to return to the Whipple Telescope data set and search its extensive...
Dr
Francesco Fenu
(University of Torino - INFN Torino)
04/08/2015, 16:00
The EUSO--Balloon experiment is being developed as a pathfinder for the JEM--EUSO mission. In this framework we are developing a series of balloon flights, with a rescaled version of the JEM--EUSO detector, to be deployed at 40 km height. In view of a long duration flight, we estimate the
feasibility of detecting real cosmic ray events. In this contribution we evaluate the energy and...
Maria Rodriguez Frias
(Space and Astroparticle Group UAH Madrid)
04/08/2015, 16:00
The Spanish bi-spectral & waterproof Infrared Camera onboard the EUSO-BALLOON (CNES) flight on August 24, 2014 from Timmins (Canada) will be reviewed in this paper. This infrared camera is aimed to obtain the cloud coverage and the cloud top height in the whole Field of View (FoV). The Infrared Camera is a stand-alone device of 0.4m x 0.4m x 0.4m with two filters centered at 10.8 μm and 12 μm...
Mario Bertaina
(Univ. & INFN Torino)
04/08/2015, 16:00
EUSO-Balloon is a first prototype of the spaced-based JEM-EUSO telescope. Built on a stratospheric balloon, the telescope flew for eight hours, the night of August 25, 2014, above Canada. Interactions of light
with clouds might impact the signal received by JEM-EUSO & EUSO-Balloon from cosmic-ray events. Reliable informations on cloud properties, such as the cloud-top-height (CTH), are thus...
Elena Orlando
(Stanford University), Dr
Eugenio Bottacini
(Stanford University)
04/08/2015, 16:00
All-sky exploration by Fermi-LAT has revolutionized our view of the gamma-ray Universe. While its ongoing all-sky survey counts thousands of sources, essential issues related to the nature of unassociated sources call for more sensitive all-sky surveys at hard X-ray energies that allow for their identification. This latter energy band encodes the hard-tail of the thermal emission and the...
Mitsue Den
(National Institute of Information and Communications Technology)
04/08/2015, 16:00
Three-dimensional MHD simulation code, REPPU (REProduce Plasma Universe) code, is developed for modeling of space plasma phenomena, and is utilized for the solar surface and the global solar wind structure. The distinguishing features of this code is the 3-D grid system, which has no polar singularity though it is able to fit the spherical structure. This grid system makes it possible to set...
Dr
Ralf Wischnewski
(DESY)
04/08/2015, 16:00
Upcoming Gamma-Ray and Cosmic-Ray experiments require relative time calibration of all detector components with (sub-)nanosecond precision.
White Rabbit, an established technology for time- and frequency transfer, can be applied here.
We describe a White Rabbit (WR) based design for Tunka-HiSCORE - a timing array for Gamma-Ray astronomy now under construction.
Sub-nsec synchronization...
Nicholas Eugene Engelbrecht
(SANSA)
04/08/2015, 16:00
The stochastic approach to solving the Parker transport equation has relatively recently become a popular means of furthering the numerical study of cosmic ray modulation. This is in part due to the fact that this approach allows for three-dimensional, time-dependent simulations over a range of energies that could not be performed using earlier finite difference techniques. We present here...
Stefan Ferreira
(North-West University)
04/08/2015, 16:00
The time-dependent modulation of galactic cosmic rays in the heliosphere is studied over different polarity cycles by computing 2.5 GV proton intensities using a two-dimensional, time-dependent modulation model. By incorporating recent theoretical advances in the relevant transport parameters in the model we showed in previous work that this approach gave realistic computed intensities over a...
Heike Prokoph
(Linnaeus University)
04/08/2015, 16:00
VER J0521+211 (RGB J0521.8+211) is one of the brightest and most powerful blazars detected in the TeV gamma-ray regime. It is located at a redshift of z=0.108 and since its discovery in 2009, VER J0521+211 has exhibited an average TeV flux exceeding 0.1 times that of the Crab Nebula, corresponding to an isotropic luminosity of 3e44 erg s-1. We present data from a comprehensive multiwavelength...
Andreas Haungs
(Karlsruhe Institute of Technology)
04/08/2015, 16:00
The steady development of semiconductor devices in the last years lead to highly improved photon detectors (called SiPM) and with that its applicability for astroparticle physics experiments. Here, we discuss particularly the application at cosmic ray air-shower fluorescence telescopes in space (JEM-EUSO telescope). For this, improvements of the newest generation of SiPM are needed concerning...
Michael Alania
(Siedlce University)
04/08/2015, 16:00
We show that the source of the energy dependence of the rigidity spectrum of the Forbush decrease (Fd) of the galactic cosmic ray (GCR) intensity are the structural changes in the interplanetary magnetic field (IMF) turbulence driven by the shock waves either directely creating near the Sun or shock waves related to the propagation of the CME in interplanetary space. We recognize that during...
Noemie Globus
(Tel Aviv University)
04/08/2015, 16:00
Recent results from Auger suggest that there might be a significant heavy component in high energy cosmic rays. It is therefore interesting to explore the possibility to accelerate not only protons but also complex nuclei in relativistic jets. We developed a numerical tool inspired by the work done by Niemiec and Ostrowski (04) to compute the acceleration of particles at midly relativistic...
1098.
Uncertainties on propagation parameters: impact on the interpretation of the positron fraction
yoann genolini
(LAPTh)
04/08/2015, 16:00
The positron fraction in cosmic rays has recently been measured with improved accuracy up to 500 GeV, and
it was found to be a steadily increasing function of energy above $\sim$ 10 GeV. This behaviour contrasts with standard
astrophysical mechanisms, in which positrons are secondary particles, produced in the interactions of primary cosmic rays during
their propagation in the interstellar...
Mr
Mathis Börner
(TU Dortmund)
04/08/2015, 16:00
IceCube is a cubic kilometer neutrino telescope located at the geographic South Pole. Although primarily designed for the detection of cosmic neutrinos, the detector is well suited for measurements of the atmospheric muon neutrino energy spectrum. We present the first measurement of the atmospheric neutrino energy spectrum obtained in its full 86-string configuration. The analysis was carried...
Eleanna Asvestari
(University of Oulu)
04/08/2015, 16:00
Here we present a new semi-empirical model describing modulation of galactic cosmic rays in the heliosphere. The model is an update of the previous similar model by Alanko-Huotari et al. (2006) and considers such heliospheric parameters as open solar magnetic flux, heliospheric current sheet tilt angle and the large scale solar magnetic field polarity. The model has been tested and calibrated...
Davide Rozza
(Universita & INFN, Milano-Bicocca (IT))
04/08/2015, 16:00
The precise measurements of the electron, positron and electron plus positron spectra, in the energy range from 0.5 GeV up to 700 GeV, 500 GeV and 1 TeV respectively, were published by the AMS-02 collaboration. We focus the attention above 10 GeV where the solar modulation effects are negligible. The differences between these data and the “classical” Local Interstellar Spectra, obtained using...
Sara Tomita
(Aoyama Gakuin University)
04/08/2015, 16:00
The Weibel instability is thought to be important for
particle acceleration and generation of magnetic
fields in relativistic shocks. However, the magnetic
field produced by the Weibel instability cannot
occupy large regions because of the rapid decay.
Non-linear evolution of the Weibel instability has
been investigated in uniform plasmas or shocks
propagating into uniform plasmas so...
Koichi Ichimura
(University of Tokyo)
04/08/2015, 16:00
XMASS, the Kamioka Dark Matter direct detection experiment with an eye to future multi purpose detector, is planning to improve its Dark Matter sensitivity by increasing the amount of liquid xenon in its inner detector volume from the current 832kg to 5 metric tons. Challenges identified with the current detector informed the design of this upgrade. In this presentation, we present the new...
Prof.
Ding Chen
(National Astronomical Observatories, CAS), Prof.
Jing Huang
(Institute of High Energy Physics, CAS), Dr
L.M. Zhai
(Institute of High Energy Physics, CAS), Prof.
M. Shibata
(Yokohama National University, Yokohama 240-8501, Japan), Dr
Y. Katayose
(Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan)
04/08/2015, 16:00
A new air-shower core-detector array (YAC: Yangbajing Air-shower Core-detector array) has been developed to measure the primary cosmic-ray composition at the ``knee" energies in Tibet, China, focusing mainly on the light components. The prototype experiment (YAC-I) consisting of 16 detectors has been constructed and operated at Yangbajing (4300 m a.s.l.) in Tibet since May 2009. YAC-I has been...
Oleg Ruchayskiy
(EPFL)
04/08/2015, 17:00
Clancy James
(University of Erlangen-Nuernberg)
04/08/2015, 17:30
The ANTARES experiment has been running in its final configuration since 2008. It is the largest neutrino telescope in the Northern hemisphere. After the discovery of a cosmic neutrino diffuse flux by the IceCube detector, the search for its origin has become a key mission in high-energy astrophysics. Particularly interesting is the indication (although not significant with the present IceCube...
Charles Jui
(University of Utah)
04/08/2015, 18:00
The Telescope Array (TA) is the largest experiment in the northern hemisphere actively observing ultrahigh energy cosmic rays. TA is a hybrid detector system combining the precision of the air fluorescence technique with the efficiency of a surface scintillator array. Three fluorescence stations each view 108 degrees in azimuth and up to 30 degrees in elevation. They are located at the...
Pasquale Serpico
(Unite Reseaux du CNRS (FR))
05/08/2015, 09:00
Direct techniques for cosmic ray observations have reached an unprecedented level of precision, unveiling
fine-details of the energy spectra. I will introduce the evidence for new spectral features which
has been accumulated by new experiments over the past few years, and review the main ideas invoked
in the theoretical explanations of the revealed spectral breaks and elemental spectra...
Prof.
Reinhard Schlickeiser
(Ruhr University Bochum)
05/08/2015, 11:00
The analytical theory of diffusive cosmic ray acceleration at parallel shock waves is generalized to arbitrary shock speeds $V_s=\beta _1c$, including in particular relativistic speeds. This is achieved by applying the diffusion approximation to the relevant Fokker-Planck particle transport equation formulated in the mixed comoving coordinate system. In this coordinate system the particle's...
Jonathan Biteau
(UC Santa Cruz)
05/08/2015, 11:00
Gamma rays from TeV blazars have been detected by ground-based experiments for more than two decades. We have collected the most extensive set of archival spectra from these sources in order to constrain the processes affecting gamma-ray propagation on cosmological distances. We discuss our results on the diffuse photon field that populates universe, called the extragalactic background light,...
Prof.
Anatoly Erlykin
(P.N.Lebedev Physical Institute, Moscow, Russia)
05/08/2015, 11:00
The attribution of part of ‘global warming’ to changes in the total solar irradiance (TSI) is an important topic which is not, yet, fully understood. Here, we examine the TSI induced temperature (T) changes on a variety of time scales, from one day to centuries and beyond, using a variety of assumptions. Also considered is the latitude variation of the T-TSI correlations, where it appears...
Dr
Tobias Jogler
(SLAC/ECAP)
05/08/2015, 11:00
SNR are commonly assumed to accelerate the cosmic rays of E < 1 PeV observed at Earth. SNRs that interact with molecular clouds (MCs) are very promising targets to distinguish between leptonic and hadronic-induced gamma-ray emission. One of the brightest Fermi/LAT-detected SNRs interacting with a MC is W51C. Here we present a very detailed analysis of 5 years of Fermi/LAT data revealing a...
Ralph Richard Engel
(KIT - Karlsruhe Institute of Technology (DE))
05/08/2015, 11:00
The data collected with the Pierre Auger Observatory have led to a number of surprising discoveries. While a strong suppression of the particle flux at the highest energies has been established unambiguously, the dominant physics processes related to this suppression cannot yet be identified. Within the energy range covered by fluorescence detector observations with sufficient statistics, an...
Cedric Schreiner
(North-West University)
05/08/2015, 11:15
The transport of charged particles in the heliosphere and the interstellar medium is governed by the interaction of particles and magnetic irregularities. For the transport of protons a rather simple model using a linear Alfven wave spectrum which follows the Kolmogorov distribution usualy yields good results. Even magnetostatic spectra may be used.
For the case of electron transport,...
Priyadarshini Bangale
(Max planck Institute for physics)
05/08/2015, 11:15
1ES 1011+496 is a blazar located at a redshift z=0.212, revealed as a very-high-energy gamma-ray emitter by MAGIC in 2007. In February 2014 the source underwent an unprecedented flaring episode. Following a flare alert issued by VERITAS, the MAGIC telescopes carried out an observation campaign for a total of 17 nights between February 6 and March 7, during which the source reached a peak flux...
Dr
Hiroyuki Sagawa
(Institute for Cosmic Ray Research, University of Tokyo)
05/08/2015, 11:15
The Telescope Array (TA), located in Utah, USA, observes highest energy cosmic rays using Surface Detectors (SDs) and Fluorescence Detectors (FDs). The SD array consists of 507 scintillation detectors on a 1.2-km square grid covering 700 km^2. The FD sets located at three sites look over the surface array. Using the first 6-year data collected by the surface detectors, we found a cluster of...
David Seckel
(University of Delaware)
05/08/2015, 11:30
IceTop is the 1 km^2 surface array of the IceCube Neutrino Observatory. Measurements of ground level particles by IceTop have been used for high precision measurements of the cosmic ray spectrum for energies of 3-300 PeV. Composition has been studied by considering coincident measurements of TeV muon bundles in the 2 km deep IceCube neutrino detector. Including IceTop data for GeV muons may...
Dr
Yulia Kartavykh
(Julius-Maximilians Universität Würzburg, Würzburg, Germany)
05/08/2015, 11:30
We use numerical solutions of the focused transport equation to study the
evolution of the pitch-angle dependent distribution function of protons
in the vicinity of parallel and oblique shock waves and compare the results
with predictions of diffusive shock acceleration theory. We then consider the
case that a seed population of protons is injected close to the Sun
simultaneously with a...
nahee park
(University of Chicago)
05/08/2015, 11:30
Gamma-ray emission from supernova remnants (SNRs) can provide a unique window to observe the cosmic-ray acceleration believed to take place in these objects. Tycho is an especially good target for investigating hadronic cosmic-ray acceleration and interactions because it is a young type Ia SNR that is well studied in other wavelengths, and it is located in a relatively clean environment....
Matthias Lorentz
(IRFU CEA Saclay)
05/08/2015, 11:30
When very high-energy photons (VHE, E>100 GeV) travel over cosmological distances, they interact with background light by pair production. In the Earth reference frame it turns out the threshold of the reaction with photons from IR to UV falls in the energy range where the H.E.S.S. array of Cherenkov telescopes is the most sensitive. Observations of spectral features in the VHE band of...
Angela V Olinto
(The University of Chicago)
05/08/2015, 11:45
The Extreme Universe Space Observatory (EUSO) to be accommodated in the
Japanese Experiment Module (JEM) of the International Space Station (ISS), JEM-EUSO,
is designed to discover the origin of ultrahigh energy cosmic rays by
observing extremely energetic extensive airshowers from space. The JEM-EUSO
design is based on a wide field of view (60$^o$) refractor with an ultrafast 0.3 M...
Alex Ivascenko
(North-West University)
05/08/2015, 11:45
The transport of charged particles in turbulent magnetic fields is a topic of
great interest in astrophysics, since our ability to successfully use cosmic
rays as astronomic messengers depends on our understanding of the transport
processes. One of the primary effects is the scattering of particles on
magnetic irregularities leading in the first instance to a change in the
pitch-angle...
Mr
Jiro Shimoda
(Department of Physics and Mathematics, Aoyama-Gakuin University, Sagamihara, Kanagawa 252-5258, Japan)
05/08/2015, 11:45
Using three-dimensional (3D) magnetohydrodynamics (MHD) simulations, we show that the efficiency of cosmic-ray (CR) production at supernova remnants (SNRs) is over-predicted if it could be estimated based on proper motion measurements of H$\alpha$ filaments in combination with shock-jump conditions.
The CR production efficiency at the SNR has been widely discussed, which seems to be...
Elisa Kay Pueschel
(University College Dublin)
05/08/2015, 11:45
A non-zero intergalactic magnetic field (IGMF) would potentially produce detectable effects on cascade emission from blazars. Depending on the strength of the IGMF, the cascade emission may be time delayed or angularly broadened compared to the blazar’s primary, unscattered emission. Ground-based imaging atmospheric-Cherenkov telescopes, such as VERITAS, have the precise angular resolution...
Ms
Marta D'Angelo
(GSSI-INFN)
05/08/2015, 12:00
We solve the Vlasov equation describing the escape of cosmic rays (CRs) from a point source, in the case when the Larmor radius is smaller than the coherence scale of the cosmological magnetic field in which CRs are propagating, right after leaving the source. The electric current that follows from this calculation is used to calculate the growth rate of a non-resonant instability. We study...
Dr
Alexandr Afanasiev
(University of Turku, Finland)
05/08/2015, 12:00
Self–consistent Monte Carlo simulations have been a fruitful approach to model particle acceleration dynamically coupled with the foreshock development in quasi-parallel shocks. Our group has developed the global Coronal Shock Acceleration (CSA) Monte Carlo simulation capable of modeling self-consistent shock acceleration from the inner corona to the solar wind. However, in the currently used...
Dr
Robert Lauer
(University of New Mexico)
05/08/2015, 12:00
The recently completed High Altitude Water Cherenkov (HAWC) gamma-ray observatory has been taking data in a partial configuration with >95% duty cycle for more than one year. With an instantaneous field of view of 2 sr, two-thirds of the sky is surveyed every day at gamma-ray energies between 100 GeV and 100 TeV. Any source location in the field of view can be monitored each day, with an...
Francois Brun
(CEA Saclay)
05/08/2015, 12:00
The supernova remnant (SNR) W49B is a mixed-morphology remnant interacting with molecular clouds (MC) which originated in a Type Ib/Ic supernova explosion that occurred between one to four thousand years ago. It has one of the highest radio surface brightnesses, and is one of the brightest X-ray SNRs of our Galaxy. Gamma-ray observations of SNR/MC are a powerful tool to constrain the origin of...
Prof.
Andrea Santangelo
(University of Tuebingen)
05/08/2015, 12:00
JEM-EUSO, on board the International Space Station, is a mission that aims at unveiling the nature and the origin of the ultra high energy cosmic rays (UHECRs), and to address basic problems of fundamental physics at extreme energies. The instrument is designed to measure the arrival direction, the energy and, possibly, the nature of these particles. It consists of a wide-field of view...
Toshihiro FUJII
(University of Chicago, University of Tokyo)
05/08/2015, 12:15
We present a concept for large area, low-cost detection of ultra-high energy cosmic rays (UHECRs) with a Fluorescence detector Array of Single-pixel Telescopes (FAST), addressing the requirements for the next generation of UHECR experiments. In the FAST design, a large field of view is covered by a few pixels at the focal plane of a mirror or Fresnel lens. We report first results of a FAST...
Urs Ganse
(University of Helsinki)
05/08/2015, 12:15
Heliospheric shocks are well-known accelerators of particles, responsible for
the creation of gradual solar energetic particle events. While the fact that
particle beams are formed in shock interactions is firmly established, many
open questions remain in regard to the microphysics of the acceleration process
and the shape of the resulting beam distribution.
The standard analytic...
Dr
Gwenael Giacinti
(University of Oxford, Clarendon Laboratory)
05/08/2015, 12:15
We investigate the beginning of cosmic ray (CR) acceleration at supernovae, from the first day to the first few decades following the explosion. We show that supernovae occuring in dense winds should accelerate CR protons to energies E > PeV. We present a detailed study of the maximum CR energy, magnetic field amplification at the shock, and compute fluxes of secondary gamma-rays and...
Renier Burger
(North-West University)
05/08/2015, 14:00
Very often cosmic-ray modulation studies entail adjusting ad hoc parameters in order to fit observed cosmic-ray intensities. Since typically not all of the parameters in such models are related to observable physical quantities like magnetic field variances and correlation scales, they cannot predict changes in cosmic-ray intensity caused by changes in turbulence quantities. In this ab initio...
Prof.
Makoto Sasaki
(Institute for Cosmic Ray Research)
05/08/2015, 14:00
Ashra is a project to build an unconventional optical telescope complex that images a very wide field of view (FOV), covering 77% of the sky, yet with the angle resolution of a few arcmin, with the use of image intensifier and CMOS technology. The project primarily aims to observe Cherenkov and fluorescence light from air-shower developments. It can also be used to monitor optical transients...
Dr
Takeshi NAKAMORI
(Yamagata University)
05/08/2015, 14:00
We perform simulations of Cherenkov Telescope Array (CTA) observations
of a young supernova remnant RX J1713.7−3946. This target is not only
one of the brightest sources ever discovered in very high-energy (VHE)
gamma-rays but also well observed in other wavebands. In X-rays, the
emission is dominated by synchrotron radiation, which links directly
to the existence of high-energy...
denise boncioli
(INFN - LNGS)
05/08/2015, 14:15
In the last years a general consensus has emerged that ultra-high energy
cosmic ray (UHECR) data can serve as a powerful probe of the validity of
special relativity. This applies in particular to the propagation of cosmic
rays from their sources to Earth through diffuse extragalactic background radiation, which is responsible for energy
suppressions due to pion photoproduction by UHE...
Roger Wendell
(The University of Tokyo)
05/08/2015, 14:15
Spanning several orders of magnitude in both neutrino energy and path length, atmospheric neutrinos are
a versatile probe of both standard and exotic mixing scenarios.
Indeed, recent measurements of $\theta_{13}$ by reactor antineutrino experiments have
opened up the possibility to observe the effect of the earth's matter on neutrino oscillations
and to subsequently determine the neutrino...
David Ruffolo
(Mahidol University)
05/08/2015, 14:15
The Galactic cosmic ray spectrum exhibits subtle variations over the 22 yr solar magnetic cycle in addition to the
more dramatic variations over the 11 yr sunspot cycle. Neutron monitors are large ground-based detectors that
provide accurate measurements of variations in the cosmic ray flux at the top of the atmosphere above the detector.
At any given location the magnetic field of the...
Dr
John W. Mitchell
(NASA Goddard Space Flight Center)
05/08/2015, 14:15
The Heavy Nuclei eXplorer (HNX) is a new instrument proposed as a NASA Small Explorer by NASA Goddard Space Flight Center, University of California, Berkeley, Washington University in St. Louis, and the Jet Propulsion Laboratory. HNX will investigate the nature of the reservoirs of nuclei at the cosmic-ray sources, the mechanisms by which nuclei are removed from the reservoirs and injected...
Prof.
Karel Kudela
(Institute of Experimental Physics, Slovak Academy of Sciences), Dr
PARTHA CHOWDHURY
(Kyung Hee University), Prof.
Y.-J Moon
(Kyung Hee University)
05/08/2015, 14:30
Galactic cosmic rays (GCRs) encounter an outward-moving solar wind with cyclic magnetic-field fluctuation and turbulence. This causes convection and diffusion in the heliosphere. The GCR counts from the ground-based neutron monitor stations show intensity changes that are anti-correlated with the sunspot numbers with a lag of a few months. In this paper, we make a detailed correlative study...
Prof.
Scott Wakely
(University of Chicago)
05/08/2015, 14:30
Recent high-profile ‘anomalies’ detected in the cosmic-ray flux have underscored the importance of improving our understanding of cosmic-ray source and propagation processes. To this end, one of the key observational tasks is obtaining measurements of the relative abundances of the light cosmic-ray isotopes at relativistic energies (above ~1 GeV/n) where existing information is extremely...
Yuuki Nakano
(Kamioka Observatory)
05/08/2015, 14:30
Super-Kamiokande (SK), a 50 kton water Cherenkov detector in Japan, observes $^{8}$B solar neutrinos with neutrino-electron elastic scattering. SK searches for distortions of the solar neutrino energy spectrum caused by the edge of the
MSW resonance in the core of the sun. It also searches for a day/night solar neutrino flux asymmetry
induced by the matter in the Earth.
The installation...
Francesco de Palma
(INFN)
05/08/2015, 14:30
Galactic cosmic ray (CRs) sources, classically proposed to be Supernova Remnants (SNRs), must meet the energetic particle content required by direct measurements of high energy CRs. Indirect gamma-ray measurements of SNRs with the Fermi Large Area Telescope (LAT) have now shown directly that at least three SNRs accelerate protons. With the first Fermi LAT SNR Catalog, we have systematically...
Elena Orlando
(Stanford University)
05/08/2015, 14:45
Cosmic rays (CR) interact with the interstellar medium and the magnetic field in the Milky Way, producing diffuse emission from radio to gamma rays. Observations of this diffuse emission and comparison with detailed predictions are powerful tools to unveil the CR distribution and to study CR propagation. We present various GALPROP CR propagation scenarios based on current CR measurements. The...
Mikhail Krainev
(Lebedev Physical Institute, Moscow, Russia)
05/08/2015, 14:45
There is a long-lasting controversy on the main causes of the long-term (11-year and 22-year) variations in the intensity and anisotropy of the galactic cosmic rays (GCR) observed for more than 50 years in the inner heliosphere. Some people believe that the 11-year variation is due entirely to the toroidal branch of solar activity (the area and number of sunspots, the strength of the...
Nicolas Renault-Tinacci
(Institut d'Astrophysique de Paris)
05/08/2015, 14:45
Millisecond pulsars (MSPs) are a growing class of gamma-ray emitters. Spectral analyses of their pulsed emission bring important constraints to the theoretical models which describe the electromagnetic processes responsible for high-energy radiations in pulsar magnetospheres. The gamma-ray data collected during five years of Fermi Large Area Telescope (LAT) observations have allowed in-depth...
Roberta Sparvoli
(University of Rome Tor Vergata)
05/08/2015, 14:45
The CSES space mission will study the temporal stability of the inner Van Allen radiation belts, investigating precipitation of trapped particles induced by magnetospheric, ionosferic and tropospheric EM emissions, as well as by seimo-electromagnetic and anthropogenic disturbances.
CSES satellite will be launched in September 2016 and inserted into a circular Sun-syncronous orbit with 98...
Alexis Coleiro
(Université Paris Diderot)
05/08/2015, 14:45
The Galactic center hosts several types of high energy sources that are potential transient neutrino emitters. A time dependent analysis based on the ANTARES data is carried out with the aim of detecting high energy neutrinos temporally connected with bursts in the electromagnetic spectrum of objects located close to the Galactic center.
This approach, more sensitive than a time-integrated...
Nicholas Eugene Engelbrecht
(SANSA)
05/08/2015, 15:00
Galactic cosmic-ray (CR) intensities calculated using numerical modulation models that proceed from first principles, where the diffusion tensor is calculated using as inputs observationally motivated forms for the heliospheric turbulence power spectrum as function of turbulence quantities yielded by turbulence transport models, are incredibly sensitive to assumptions made as to the...
Anna Obertacke
(Uni Wuppertal)
05/08/2015, 15:00
Dario Gasparrini
(ASDC/ INFN Perugia)
05/08/2015, 15:00
The third catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (3LAC) is presented. It is based on the third catalog (3FGL, Acero et al. 2015, arxiv 1501.02003) of sources detected with a test statistic greater than 25, using the first 4 years of data. The 3LAC includes 1591 AGNs located at high (|b|>10°) Galactic latitudes (with 28 duplicate associations,...
Shoji Torii
(Waseda University (JP))
05/08/2015, 15:00
The CALorimetric Electron Telescope (CALET) space experiment, which has been developed by Japan in collaboration with Italy and the United States, is a high-energy astroparticle physics mission to be installed on the International Space Station (ISS). The primary goals of the CALET mission include investigating possible nearby sources of high energy electrons, studying the details of galactic...
Christo Venter
(North-West University, Potchefstroom Campus)
05/08/2015, 15:00
Pair cascades from MSPs may be a primary source of Galactic electrons and positrons that contribute to the increase in positron flux above 10 GeV as observed by PAMELA and AMS-02. The Fermi Large Area Telescope has increased the number of detected gamma-ray millisecond pulsars (MSPs) tremendously. Light curve modelling furthermore favours abundant pair production in MSP magnetospheres, so that...
Dr
Giovanni Morlino
(Gran Sasso Science Institute)
05/08/2015, 15:15
Cosmic rays (CR) are a fundamental source of ionization for molecular clouds as well as diffuse clouds, influencing their chemical, thermal, and dynamical evolution. The amount of CR inside a cloud also determines the γ-ray flux produced by hadronic collisions between CR and cloud materials. We study the spectrum of CR inside and outside a diffuse cloud for energies > MeV. We solve the...
Chi Cheung
(Naval Research Laboratory)
05/08/2015, 15:15
Novae are now firmly established as a high-energy (>100 MeV) gamma-ray source class by the Fermi Large Area Telescope (LAT). In symbiotic systems such as V407 Cyg 2010, there is a firm theoretical framework for the production of shock-acceleration particles in the nova ejecta from interactions with the dense wind of the red giant companion. Yet, the >100 MeV emission detected in classical...
Euan Richard
(Tokyo University)
05/08/2015, 15:15
Measurements of the atmospheric neutrino flux have been performed
using Super-Kamiokande, a 22.5 kton fiducial-volume water-Cherenkov
detector located in the Mozumi mine in Japan. Beginning operation in
1996, the detector has the world's highest statistics for observation
of neutrinos originating from cosmic ray interactions in the
atmosphere, which may be compared to the predictions...
Dr
Donald Ngobeni
(Vaal University of Technology)
05/08/2015, 15:15
It is well known that particle drift motions are suppressed by diffusive scattering as established by direct numerical simulations. The effect of constant scattering on the drift velocities of charged particles has always been included in numerical modulation models provided that the weak scattering drift velocity is scaled down in magnitude, although in an empirical manner as comparisons...
Prof.
Mikhail Panasyuk
(SINP MSU)
05/08/2015, 15:15
Modified KLYPVE is a novel fluorescence detector of ultra high energy cosmic rays (UHECRs, energies >50 EeV) to be installed on the Russian Segment of the International Space Station. The main goal of the experiment is to register arrival directions and energies of EECRs but it will be able to register other transient events in the atmosphere as well. The main component of KLYPVE is a...
Stefano Della Torre
(Universita & INFN, Milano-Bicocca (IT))
05/08/2015, 15:30
The cosmic rays modulation inside the heliosphere, is well described by a transport equation introduced by Parker in 1965.
To solve this equation several approaches were followed in the past.
Recently the Monte Carlo approach become widely used in force of his advantages with respect to other numerical methods. In the Monte Carlo approach the transport equation is associated to a fully...
Peter von Ballmoos
(IRAP)
05/08/2015, 15:30
on behalf of the JEM-EUSO collaboration
EUSO-BALLOON is a pathfinder for JEM-EUSO, the Extreme Universe Space Observatory which is to be hosted on-board the International Space Station. As JEM-EUSO is designed to observe Ultra-High Energy Cosmic Rays (UHECR)-induced Extensive Air Showers (EAS) by detecting their ultraviolet light tracks "from above", EUSO-BALLOON is a nadir-pointing UV...
Prof.
Eun Suk Seo
(University of Maryland (US))
05/08/2015, 15:45
The balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment was flown for ~161 days in six flights over Antarctica. Elemental spectra were measured for Z = 1 - 26 nuclei over a wide energy range from ~ $10^{10}$ to >$10^{14}$ eV at an average altitude of ~38.5 km with ~3.9 g/$cm^2$ atmospheric overburden. Building on the success of the balloon flights, the payload has been...
Dr
Sara Buson
(University of Padova)
05/08/2015, 15:45
The double-image gravitationally lensed blazar B0218+357 displayed several intervals of enhanced activity at gamma-rays. Fermi LAT observations focussed on the 2012 flaring interval led to the measurement at >100 MeV energies of a delay between the two lensed images of 11.46 ± 0.16 days. The delay is about 1 day longer than previously measured at radio wavelengths. Renewed flaring activity has...
Martina Cardillo
(INAF - Osservatorio astrofisico di Arcetri)
05/08/2015, 15:45
While from the energetic point of view supernova remnants are viable sources of Galactic cosmic rays (CRs), the issue of whether they can accelerate protons up to a few PeV remains unsolved. Here we discuss particle acceleration at the forward shock of supernovae, and discuss the possibility that the current of escaping particles may excite a non-resonant instability that in turn leads to the...
Marius Wallraff
(RWTH Aachen University)
05/08/2015, 15:45
The IceCube Neutrino Observatory is a 1 km$^3$ Cherenkov detector located at the geographic South Pole. It records several tens of thousands of identified atmospheric muon neutrino events per year and has proven to be suitable for the measurement of muon neutrino disappearance due to oscillations. Using similar methods, IceCube allows the search for additional sterile neutrino states with mass...
Fusa Miyake
(Nagoya University)
05/08/2015, 15:45
$^{14}$C content in tree rings and $^{10}$Be concentration records in ice core provide information about past cosmic ray intensities. Some studies reported a large annual increase in the $^{14}$C content from AD 774 to 775. Also quasi-decadal $^{10}$Be data in the Dome Fuji ice core show a sharp peak in a corresponding period of the AD 775 event. However, annual $^{10}$Be variations in the...
Paolo Desiati
(University of Wisconsin - Madison)
05/08/2015, 17:00
The IceCube Neutrino Observatory, designed to identify high energy neutrinos of astrophysical origin, efficiently collects the penetrating by-products of cosmic ray induced extensive air showers: the muons and neutrinos. IceCube, along with its densely instrumented in-fill array Deep-Core, has collected and identified approximately 450,000 neutrinos in the energy range from 10 GeV to over 100...
Dr
John Pretz
(Pennsylvania State University)
05/08/2015, 17:30
The High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory was completed this year at a 4100-meter site on the flank of the Sierra Negra volcano in Mexico. HAWC is a water Cherenkov ground array with the capability to distinguish 100 GeV - 100 TeV gamma rays from the hadronic cosmic-ray background. HAWC is uniquely suited to study extremely high energy cosmic-ray sources, search for...
Ilya Usoskin
(University of Oulu)
05/08/2015, 18:00
Solar energetic particle (SEP) fluxes are typically quantified in the F30 units (integrated fluence of particles with energy above 30 MeV) and their direct measurements are available only for the last several decades. On the other hand, a reconstruction of major SEP events in the distant past (centennia-millennia) is possible using data on the cosmogenic isotopes $^{14}$C and $^{10}$Be in...
Prof.
Bernd Heber
(Institut fuer Experimentelle und Angewandte Physik, Christian-Albrechts-Universitaet Kiel)
06/08/2015, 09:00
Rapporteur talk
Ad van den Berg
(University of Groningen),
Karl-Heinz Kampert
(Universität Wuppertal)
06/08/2015, 16:45