Conveners
Parallel Session 1: Physics, Reconstruction and Software
- Claudio Kopper
- Alexander Kappes (Friedrich-Alexander-Univ. Erlangen (DE))
- Timo Thomas Karg (Unknown)
Parallel Session 1: Physics, Reconstruction and Software
- Timo Thomas Karg (Unknown)
- Claudio Kopper
- Alexander Kappes (Friedrich-Alexander-Univ. Erlangen (DE))
Parallel Session 1: Physics, Reconstruction and Software
- Timo Thomas Karg (Unknown)
- Alexander Kappes (Friedrich-Alexander-Univ. Erlangen (DE))
- Claudio Kopper
Parallel Session 1: Physics, Reconstruction and Software
- Timo Thomas Karg (Unknown)
- Claudio Kopper
- Alexander Kappes (Friedrich-Alexander-Univ. Erlangen (DE))
Marcos Santander
(UW-Madison)
12/10/2011, 14:00
Physics, reconstruction and software
The main background to the search for astrophysical neutrino sources with large volume telescopes is due to the muon component of extensive air showers produced in the interaction of high-energy cosmic rays with the Earth’s atmosphere. This background, however a nuisance for neutrino-event searches, can be used to explore certain aspects of cosmic ray physics. The high rate of muon events in...
Jutta Schnabel
(Universität Erlangen-Nürnberg/ECAP)
12/10/2011, 14:00
Physics, reconstruction and software
The energy reconstruction of both neutrino induced muons from neutrino interactions in the vicinity of the detector and of muons from cosmic ray air showers contributes indispensable information for a broad range of physics analyses, e.g. by increasing the sensitivity in neutrino point source searches or by offering access to observables such as the atmospheric neutrino spectrum. Currently...
Patrick Berghaus
(University of Delaware)
12/10/2011, 14:20
Physics, reconstruction and software
The composition of cosmic rays in the range relevant for large-volume neutrino detectors constitutes a significant systematic uncertainty. An overview of available data from other experiments will be given, and the potential for independent measurements with a cubic-kilometer scale detector outlined.
David Boersma
(RWTH Aachen University)
12/10/2011, 14:20
Physics, reconstruction and software
The energy of muon neutrinos and muons detected by IceCube is not directly measured. For low energy contained events the length of the track inside can be used to derive an energy estimate. For higher energy through-going events the main energy-related observable is the energy *loss* of muons. The stochastic nature of this energy loss makes the reconstruction non-trivial. Several approaches...
boutayeb bouhou
(APC)
12/10/2011, 14:40
Physics, reconstruction and software
A multimessenger approach with gravitational waves (GW) and high-energy neutrinos (HEN) is expected to open new perspectives in the study of the most violent astrophysical processes in the Universe. Several experiments (e.g. ANTARES, IceCube, LIGO and VIRGO) are currently recording data and searching for astrophysical sources. A working group gathering physicists from those experiments has...
Agustín Sánchez Losa
(IFIC (Spain))
12/10/2011, 14:40
Physics, reconstruction and software
The ANTARES telescope observes a full hemisphere of the sky all the time with a duty cycle close to 100%. This makes it well suited for an extensive observation of the neutrinos that can be produced in astrophysical transient sources.
In the surrounding medium of the blazars, i.e. active galactic nuclei with their jets pointing almost directly through the observer, neutrinos may be produced...
Dr
Anthony Leisos
(Hellenic Open University School of Science & Technology)
12/10/2011, 15:00
Physics, reconstruction and software
We investigate the potential of a Very Large Volume Underwater Neutrino Telescope to observe Super Nova explosions within our Galaxy. The intense neutrino burst emitted in a SN explosion results in a large number of MeV neutrinos in the vicinity of the Neutrino Telescope which can be detected (mainly) via the reaction $\bar{\nu}_e +p \rightarrow e^{+}+n$. For the simulation study we have used...
Juergen Brunner
(Universite d'Aix - Marseille II (FR))
12/10/2011, 15:00
Physics, reconstruction and software
The data taken with ANTARES from 2007 to 2010 with a total lifetime of 830 days have been analysed in view of a possible neutrino oscillation signal. The flux of vertical upward going muon neutrinos should be completely suppressed at energies of 24 GeV due to neutrino oscillations.
A dedicated algorithm is used, which allows the reliable reconstruction of muon tracks with energies as low as...
Juan De Dios Zornoza Gomez
12/10/2011, 15:20
Physics, reconstruction and software
The ANTARES Collaboration is now operating the largest water Cherenkov neutrino telescope in the Nothern hemisphere. The apparatus, completed in 2008, comprises 12 detection lines and a multidisciplinary instrumentation line installed at a depth of about 2500 m in the Mediterranean Sea offshore from France.
The goals of ANTARES are among others the search for astrophysical neutrino point...
Javier Gonzalez
(KIT)
12/10/2011, 15:20
Physics, reconstruction and software
The Pierre Auger Observatory is sensitive to extended air-showers induced by ultra-high-energy neutrinos of all flavors as they interact with the atmosphere and inside the earth. These air-showers display characteristic features that allow their identification. We report on recent searches for ultra-high-energy neutrinos at the Pierre Auger Observatory. We present the different identification...
Rezo Shanidze
(Unuversity of Erlangen)
12/10/2011, 15:40
Physics, reconstruction and software
Cosmogenic neutrinos are produced during the propagation of ultra high energy cosmic rays (UHECR) through the cosmological microwave background radiation. Extragalactic origin of UHECR guarantees generation of the high energy cosmogenic neutrinos, however the flux depends on the currently unknown properties of UHECR, for example the chemical composition and distribution of the sources. ...
Ms
Gabriela Emilia Pavalas
(Institute for Space Sciences, Bucharest, Romania)
12/10/2011, 15:40
Physics, reconstruction and software
The ANTARES neutrino telescope was installed in the Mediterranean Sea in several stages, and was completed in 2008. It comprises a three-dimensional array of 885 Optical Modules distributed on 12 vertical lines, anchored at a depth of 2475 m. While designed to observe upgoing neutrinos, ANTARES could also be sensitive to the bright signal of relativistic magnetic monopoles and slow...
Mr
Claudio Bogazzi
(NIKHEF)
12/10/2011, 16:30
Physics, reconstruction and software
Results of a time-integrated search for astrophysical high energy neutrinos are presented using data collected from January 2007 to December 2010 with the ANTARES neutrino telescope. ANTARES is currently the largest neutrino detector on the Northern Hemisphere consisting of a tri-dimensional array of 885 photomultipliers arranged on 12 vertical lines, placed at a depth of 2475 meters in the...
Chad Finley,
Chad Finley
12/10/2011, 16:50
Physics, reconstruction and software
A wide range of analyses are pursued by IceCube in the search for astrophysical sources of neutrinos. These include time-integrated searches for steady sources, time-dependent searches correlated with AGN and other flares, and searches dedicated to GRBs as well as generic all-sky burst searches. In addition, an online system is now in place that sends neutrino-triggered alerts to optical,...
Mr
Thomas Seitz
(ECAP - University of Erlangen (for the KM3NeT consortium))
12/10/2011, 17:10
Physics, reconstruction and software
The future neutrino telescope KM3NeT, to be built in the Mediterranean Sea, will be the largest Cherenkov detector and will include several hundred thousands photomultiplier tubes (PMT). In the deep sea the dominant source of PMT signals are decays of K40 and marine fauna bioluminescence. Selection of neutrino and muon events from this continuous optical background signals requires the...
Dr
piera sapienza
(lns)
12/10/2011, 17:30
Physics, reconstruction and software
The KM3NeT consortium http://www.km3net.org aims at the construction of a cubic-kilometre-scale neutrino telescope for the Northern hemisphere with an integrated platform for earth and deep sea sciences.
The telescope location in the Mediterranean Sea will allow for surveying a large part of the Galactic Plane (87%), including the Galactic Centre, thus complementing the sky coverage of...
Dr
Apostolos Tsirigotis
(HOU)
12/10/2011, 17:50
Physics, reconstruction and software
We report on the evaluation of the performance of a Mediterranean very large volume neutrino telescope. We present results of our studies concerning the capability of the telescope in detecting/discovering galactic (steady point sources) and extragalactic, transient (Gamma Ray Bursts) high energy neutrino sources as well as measuring ultra high energy diffuse neutrino fluxes. The neutrino...
Dr
Rosa Coniglione
(INFN- Laboratori Nazionali del Sud)
12/10/2011, 18:10
Physics, reconstruction and software
A recent analysis of the Fermi data [1] provides evidence of the emission of high energy gamma rays (up to 100 GeV) with a high intensity E-2 spectrum. This emission was detected as originating from two large areas around the Galactic center, spanning 50° above and below the Galactic center and 40° in longitude, with no spacial evidence of variation both in the spectrum shape and in the...
Annarita Margiotta
(Universita e INFN (IT))
13/10/2011, 10:00
Physics, reconstruction and software
A short overview of the MC simulation tools used in the ANTARES and IceCube experiments is given. The differences in the general approaches used by the 2 groups due to the characteristic features of the medium where the detectors collect data are stressed and discussed. Limitations of the present tools are reviewed and on-going developments of new software and techniques are presented.
Max Neff
(ECAP)
13/10/2011, 10:30
Physics, reconstruction and software
Acoustic neutrino detection is a promising approach for large-scale ultra high energy neutrino detectors in water. The presented simulation chain is designed within the SeaTray/IceTray software framework. Its modular architecture is highly flexible and makes it easy to adapt to different detector geometries, environmental conditions or hardware used. The simulation chain covers the generation...
Qader Dorosti
(KVI Groningen)
13/10/2011, 10:50
Physics, reconstruction and software
The ANTARES neutrino telescope operating in the Mediterranean Sea aims to measure the cosmic neutrino flux and locate point sources in the multi-TeV energy range. Primarily this is achieved by detecting up-going muon tracks caused by charged-current interactions of neutrinos having passed through the Earth. Neutrino-induced showers, initiated by neutral-current interactions, extend the...
Eike Middell
(DESY)
13/10/2011, 11:10
Physics, reconstruction and software
An instrument like IceCube searches for neutrinos by recording and interpreting the Cherenkov light of charged particles that traverse the instrumented volume. From the photon intensity and arrival times at different locations in the detector one has to discern the nature of the event, separate neutrino candidates from the atmospheric muon background, and derive relevant properties like the...
Dr
Gianfranca De Rosa
(Università di Napoli Federico II)
13/10/2011, 11:30
Physics, reconstruction and software
In high energy neutrino telescopes, the detection principle relies on the detection of Cherenkov light emitted from an up-going muon induced by νμ that have penetrated the Earth.
At the muon energy range of interest in astrophysical search (namely from about 100 GeV to about 1 PeV), the electromagnetic showers accompanying the muon track generate Cherenkov light emitted within a few degrees...
Dr
Apostolos Tsirigotis
(Physics Laboratory, School of Science & Technology, Hellenic Open University)
13/10/2011, 11:50
Physics, reconstruction and software
Gamma ray earthbound & satellite experiments have observed over the last years many Galactic and extragalactic gamma ray sources. The detection of astrophysical neutrinos emitted by the same sources would imply that these astrophysical objects are charged cosmic ray accelerators and help to resolve the enigma of the origin of cosmic rays. A very large volume neutrino telescope will be able to...
Prof.
Spyros Tzamarias
(Hellenic Open University)
13/10/2011, 12:10
Physics, reconstruction and software
We report on the development of search methods for point like and extended neutrino sources taking into account the resolution of an underwater Mediterranean neutrino telescope to reconstruct the direction as well as the energy of the detected muon tracks, on a track by track basis. We present results on the potential of a very large volume neutrino telescope to discover neutrino sources. The...
