Ad van den Berg
(University of Groningen)
7/30/15, 9:00 AM
Karl-Heinz Kampert
(Universität Wuppertal)
7/30/15, 9:10 AM
Prof.
Sibrand Poppema
(University of Groningen)
7/30/15, 9:25 AM
Stefan Westerhoff
(University of Wisconsin-Madison)
7/30/15, 11:00 AM
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)
7/30/15, 11:00 AM
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))
7/30/15, 11:00 AM
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,)
7/30/15, 11:00 AM
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)
7/30/15, 11:00 AM
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)
7/30/15, 11:15 AM
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)
7/30/15, 11:15 AM
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)
7/30/15, 11:15 AM
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))
7/30/15, 11:15 AM
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)
7/30/15, 11:30 AM
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)
7/30/15, 11:30 AM
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)
7/30/15, 11:30 AM
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)))
7/30/15, 11:30 AM
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)
7/30/15, 11:30 AM
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)
7/30/15, 11:45 AM
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)
7/30/15, 11:45 AM
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)
7/30/15, 12:00 PM
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)
7/30/15, 12:00 PM
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)
7/30/15, 12:00 PM
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)
7/30/15, 12:00 PM
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))
7/30/15, 12:00 PM
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)
7/30/15, 12:15 PM
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))
7/30/15, 12:15 PM
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)
7/30/15, 12:15 PM
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)
7/30/15, 2:00 PM
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)
7/30/15, 2:00 PM
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)
7/30/15, 2:00 PM
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)
7/30/15, 2:00 PM
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)
7/30/15, 2:15 PM
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)
7/30/15, 2:15 PM
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)
7/30/15, 2:15 PM
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)
7/30/15, 2:30 PM
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)
7/30/15, 2:30 PM
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)
7/30/15, 2:30 PM
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)
7/30/15, 2:30 PM
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)
7/30/15, 2:45 PM
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)
7/30/15, 2:45 PM
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))
7/30/15, 2:45 PM
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)
7/30/15, 2:45 PM
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)
7/30/15, 3:00 PM
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)
7/30/15, 3:00 PM
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))
7/30/15, 3:00 PM
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)
7/30/15, 3:00 PM
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)
7/30/15, 3:00 PM
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)
7/30/15, 3:15 PM
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)
7/30/15, 3:15 PM
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)
7/30/15, 3:15 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
Brian Wundheiler
(Instituto de Tecnologias en Deteccion y Astroparticulas)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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")
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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...
523.
FACT – Novel mirror alignment using Bokeh and enhancement of the VERITAS SCCAN alignment method
Sebastian Mueller
(ETH Zuerich)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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.))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
Donald Ngobeni
(Vaal University of Technology)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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...
Eino Valtonen
(University of Turku)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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))
7/30/15, 3:30 PM
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...
Vladimir Mikhailov
(NRNU MEPHI)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 3:30 PM
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)
7/30/15, 4:30 PM
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...
Miguel Pato
(OKC Stockholm)
7/30/15, 5:30 PM
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))
7/30/15, 6:00 PM
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)
7/31/15, 9:00 AM
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)
7/31/15, 11:00 AM
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)
7/31/15, 11:00 AM
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)
7/31/15, 11:00 AM
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)
7/31/15, 11:00 AM
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)
7/31/15, 11:00 AM
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)
7/31/15, 11:15 AM
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)
7/31/15, 11:15 AM
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)
7/31/15, 11:15 AM
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)
7/31/15, 11:15 AM
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)
7/31/15, 11:15 AM
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)
7/31/15, 11:30 AM
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)
7/31/15, 11:30 AM
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)
7/31/15, 11:30 AM
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))
7/31/15, 11:30 AM
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)
7/31/15, 11:30 AM
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)
7/31/15, 11:45 AM
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)
7/31/15, 11:45 AM
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))
7/31/15, 11:45 AM
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))
7/31/15, 11:45 AM
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)
7/31/15, 11:45 AM
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)
7/31/15, 12:00 PM
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)
7/31/15, 12:00 PM
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)
7/31/15, 12:00 PM
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)
7/31/15, 12:00 PM
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)
7/31/15, 12:15 PM
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)
7/31/15, 12:15 PM
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)
7/31/15, 12:15 PM
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)
7/31/15, 12:15 PM
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)
7/31/15, 12:15 PM
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)
7/31/15, 2:00 PM
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)
7/31/15, 2:00 PM
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)
7/31/15, 2:00 PM
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)
7/31/15, 2:00 PM
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)
7/31/15, 2:00 PM
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)
7/31/15, 2:15 PM
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)
7/31/15, 2:15 PM
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...