* Astronomy

Members Login
Username 
 
Password 
    Remember Me  
Home -> Astronomy News -> Physics News -> Antares telescope
Post Info TOPIC: Antares telescope
Blobrana


L

Posts: 131433
Date:
ANTARES Neutrino Telescope
Permalink  
 

Title: First Search for Dark Matter Annihilation in the Sun Using the ANTARES Neutrino Telescope
Author: ANTARES Collaboration: S. Adrián-Martinez, I. Al Samarai, A. Albert, M. André, M. Anghinolfi, G. Anton, L. Anton, S. Anvar, M. Ardid, T. Astraatmadjaote, J-J. Aubert, B. Baret, S. Basa, V. Bertin, S. Biagi, C. Bigongiari, C. Bogazzi, B. Bouhou, M.C. Bouwhuis, J.Brünner, J. Busto, A. Capone, C. Cârloganu, J. Carr, S. Cecchini, Z. Charif, Ph. Charvis, T. Chiarusi, M. Circella, F. Classen, R. Coniglione, L. Core, H. Costantini, P. Coyle, A. Creusot, C. Curtil, G. De Bonis, M.P. Decowski, I. Dekeyser, A. Deschamps, C. Distefano, C. Donzaud, D. Dornic, Q. Dorosti, D. Drouhin, A. Dumas, T. Eberl, U. Emanuele, A. Enzenhöfer, J-P. Ernenwein, S. Escoffier, K. Fehn, P. Fermani, S. Ferry, V. Flaminio, F. Folger, U. Fritsch, J-L. Fuda, S. Galatŕ, P. Gay, S. Geisselsöder, et al. (94 additional authors not shown)

A search for high-energy neutrinos coming from the direction of the Sun has been performed using the data recorded by the ANTARES neutrino telescope during 2007 and 2008. The neutrino selection criteria have been chosen to maximize the selection of possible signals produced by the self-annihilation of weakly interacting massive particles accumulated in the centre of the Sun with respect to the atmospheric background. After data unblinding, the number of neutrinos observed towards the Sun was found to be compatible with background expectations. The 90% CL upper limits in terms of spin-dependent and spin-independent WIMP-proton cross-sections are derived and compared to predictions of two supersymmetric models, CMSSM and MSSM-7. The ANTARES limits are competitive with those obtained by other neutrino observatories and are more stringent than those obtained by direct search experiments for the spin-dependent WIMP-proton cross-section.

Read more (146kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
RE: Antares telescope
Permalink  
 

Title: Recent results from the ANTARES deep sea neutrino telescope
Authors: Paschal Coyle

The ANTARES deep sea neutrino telescope has acquired over four years of high quality data. This data has been used to measure the oscillation parameters of atmospheric neutrinos and also to search for neutrinos of a non-terrestrial origin. Competitive upper limits on the fluxes of neutrinos from dark matter annihilation in the Sun, a variety of Galactic and extra-galactic sources, both steady and transient, are presented.

Read more (1002kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
ANTARES neutrino telescope
Permalink  
 

Title: First results from the ANTARES neutrino telescope
Authors: Th. Eberl for the ANTARES collaboration

The ANTARES detector is the most sensitive neutrino telescope observing the southern sky and the world's first particle detector operating in the deep sea. It is installed in the Mediterranean Sea at a depth of 2475 m. As an example of early results, the determination of the atmospheric muon flux is discussed and a good agreement with previous measurements is found. Furthermore, the results of a search for high-energy events in excess of the atmospheric neutrino flux are reported and significant limits are set on the diffuse cosmic neutrino flux in the multi-TeV to PeV energy range. Using data from more than 800 days of effective data taking, partly during the construction phase, a first analysis searching for point-like excesses in the neutrino sky distribution has been performed. The resulting sensitivity of ANTARES is reported and compared to measurements of other detectors. A method employed for a first search for neutrinos from Fermi-detected gamma-ray flaring blazars in the last 4 months of 2008 is described and the results are reported. No significant neutrino signal in excess of that expected from atmospheric background has been found.

Read more (256kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
RE: Antares telescope
Permalink  
 

Title: Selected results from the ANTARES neutrino telescope
Authors: Salvatore Mangano, for the ANTARES collaboration

The ANTARES telescope is the largest underwater neutrino telescope existing at present. It is based on the detection of Cherenkov light produced in sea water by neutrino-induced muons. The detector, consisting of a tri-dimensional array of 885 photomultipliers arranged on twelve vertical lines, is located at a depth of 2475 m in the Mediterranean Sea, 40 km off the French coast. The main goal of the experiment is to probe the Universe by means of neutrino events in an attempt to investigate the nature of high energy astrophysical sources, to contribute to the identification of cosmic ray sources, and to explore the nature of dark matter. In this contribution we will review the status of the detector, illustrate its operation and performance, and present the first results from the analysis carried out on atmospheric muons and neutrinos, as well as from the search for astrophysical neutrino sources.

Read more (904kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
ANTARES neutrino telescope
Permalink  
 

Title: Astrophysical point source search with the ANTARES neutrino telescope
Authors: Salvatore Mangano for the ANTARES Collaboration

The ANTARES neutrino telescope is installed at a depth of 2.5 km of the Mediterranean Sea and consists of a three-dimensional array of 885 photomultipliers arranged on twelve detector lines. The prime objective is to detect high-energy neutrinos from extraterrestrial origin. Relativistic muons emerging from charged-current muon neutrino interactions in the detector surroundings produce a cone of Cherenkov light which allows the reconstruction of the original neutrino direction. The collaboration has implemented different methods to search for neutrino point sources in the data collected since 2007. Results obtained with these methods as well as the sensitivity of the telescope are presented.

Read more (1495kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
RE: Antares telescope
Permalink  
 

Title: Search for Dark Matter in the Sun with the ANTARES Neutrino Telescope in the CMSSM and mUED frameworks
Authors: J.D. Zornoza

ANTARES is the first neutrino telescope in the sea. It consists of a three-dimensional array of 885 photomultipliers to collect the Cherenkov light induced by relativistic muons produced in CC interactions of high energy neutrinos. One of the main scientific goals of the experiment is the search for dark matter. We present here the analysis of data taken during 2007 and 2008 to look for a WIMP signal in the Sun. WIMPs are one of the most popular scenarios to explain the dark matter content of the Universe. They would accumulate in massive objects like the Sun or the Galactic Center and their self-annihilation would produce (directly or indirectly) high energy neutrinos detectable by neutrino telescopes. Contrary to other indirect searches (like with gamma rays or positrons), the search for neutrinos in the Sun is free from other astrophysical contributions, so the interpretation of a potential signal in terms of dark matter is much more robust.

Read more (47kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Title: ANTARES: Status, first results and multi-messenger astronomy
Authors: Manuela Vecchi for the ANTARES Collaboration

The ANTARES Collaboration has completed in 2008 the deployment of what is currently the largest high energy neutrino detector in the Northern hemisphere. The search for cosmic neutrinos in the energy range between tens of GeV and tens of PeV is performed by means of a three dimensional array of photomultiplier tubes (PMTs), arranged on 12 vertical structures (strings) located in the Mediterranean Sea at a depth of about 2500 meters. The detection principle relies on the identification of the Cherenkov light produced as ultra-relativistic muons propagate in water. The main goal of the detector is the search for point-like sources of cosmic neutrinos from both Galactic and extra-Galactic sources. Besides the search for point sources, other analysis topics are strongly pursued and will be described in the following.

 Read more  (92kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Title: Results from the ANTARES neutrino telescope
Authors: Giorgio Giacomelli

The ANTARES underwater neutrino telescope is located in the Mediterranean Sea about 40 km from Toulon at a depth of 2475 m. In its 12 line configuration it has almost 900 photomultipliers in 275 "floors". The performance of the detector is discussed and several results are presented, including the measurements of downgoing muons, search for a diffuse flux of high energy muon neutrinos, search for cosmic point sources of neutrinos, search for fast magnetic monopoles, etc. A short discussion is also made on Earth and Sea Science studies with a neutrino telescope.

Read more  (1223kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Title: ANTARES: the first undersea neutrino telescope
Authors: ANTARES Collaboration

The ANTARES Neutrino Telescope was completed in May 2008 and is the first operational Neutrino Telescope in the Mediterranean Sea. The main purpose of the detector is to perform neutrino astronomy and the apparatus also offers facilities for marine and Earth sciences. This paper describes the design, the construction and the installation of the telescope in the deep sea, offshore from Toulon in France. An illustration of the detector performance is given.

Read more  (8014kb, PDF)



__________________
Blobrana


L

Posts: 131433
Date:
Permalink  
 

Title: The ANTARES Telescope Neutrino Alert System
Authors: M. Ageron, J.A. Aguilar, I. Al Samarai, A. Albert, M. André, M. Anghinolfi, G. Anton, S. Anvar, M. Ardid, A.C. Assis Jesus, T. Astraatmadja, J-J. Aubert, B. Baret, S. Basa, V. Bertin, S. Biagi, A. Bigi, C. Bigongiari, C. Bogazzi, M. Bou-Cabo, B. Bouhou, M.C. Bouwhuis, J. Brunner, J. Busto, F. Camarena, A. Capone, C. Cârloganu, G. Carminati, J. Carr, S. Cecchini, Z. Charif, Ph. Charvis, T. Chiarusi, M. Circella, R. Coniglione, H. Costantini, P. Coyle, C. Curtil, M.P. Decowski, I. Dekeyser, A. Deschamps, C. Distefano, C. Donzaud, D. Dornic, Q. Dorosti, D. Drouhin, T. Eberl, U. Emanuele, A. Enzenöfer, J-P. Ernenwein, S. Escoffier, P. Fermani, M. Ferri, V. Flaminio, F. Folger, U. Fritsch, J-L. Fuda, S. Galatŕ, P. Gay, G. Giacomelli, V. Giordano, J.Gňmez-González, et al. (90 additional authors not shown)

The ANTARES telescope has the capability to detect neutrinos produced in astrophysical transient sources. Potential sources include gamma-ray bursts, core collapse supernovae, and flaring active galactic nuclei. To enhance the sensitivity of ANTARES to such sources, a new detection method based on coincident observations of neutrinos and optical signals has been developed. A fast online muon track reconstruction is used to trigger a network of small automatic optical telescopes. Such alerts are generated for special events, such as two or more neutrinos, coincident in time and direction, or single neutrinos of very high energy.

Read more  (91kb, PDF)



__________________
1 2  >  Last»  | Page of 2  sorted by
Quick Reply

Please log in to post quick replies.
Home -> Astronomy News -> Physics News -> Antares telescope


Create your own FREE Forum
Report Abuse 		Powered by ActiveBoard