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Title: SEARCHES FOR POINT-LIKE AND EXTENDED NEUTRINO SOURCES CLOSE TO THE GALACTIC CENTER USING THE ANTARES NEUTRINO TELESCOPE

A search for cosmic neutrino sources using six years of data collected by the ANTARES neutrino telescope has been performed. Clusters of muon neutrinos over the expected atmospheric background have been looked for. No clear signal has been found. The most signal-like accumulation of events is located at equatorial coordinates R.A. = –46.°8 and decl. = –64.°9 and corresponds to a 2.2σ background fluctuation. In addition, upper limits on the flux normalization of an E {sup –2} muon neutrino energy spectrum have been set for 50 pre-selected astrophysical objects. Finally, motivated by an accumulation of seven events relatively close to the Galactic Center in the recently reported neutrino sample of the IceCube telescope, a search for point sources in a broad region around this accumulation has been carried out. No indication of a neutrino signal has been found in the ANTARES data and upper limits on the flux normalization of an E {sup –2} energy spectrum of neutrinos from point sources in that region have been set. The 90% confidence level upper limits on the muon neutrino flux normalization vary between 3.5 and 5.1 × 10{sup –8} GeV cm{sup –2} s{sup –1}, depending on the exact location of the source.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ; ; ; ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ; ; ; ;  [11] ;  [12] more »; « less
  1. Institut d'Investigació per a la Gestió Integrada de les Zones Costaneres (IGIC) - Universitat Politècnica de València. C/Paranimf 1, E-46730 Gandia (Spain)
  2. GRPHE - Institut universitaire de technologie de Colmar, 34 rue du Grillenbreit BP 50568, F-68008 Colmar (France)
  3. Technical University of Catalonia, Laboratory of Applied Bioacoustics, Rambla Exposició, E-08800 Vilanova i la Geltrú, Barcelona (Spain)
  4. INFN - Sezione di Genova, Via Dodecaneso 33, I-16146 Genova (Italy)
  5. Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen Centre for Astroparticle Physics, Erwin-Rommel-Str. 1, D-91058 Erlangen (Germany)
  6. CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille (France)
  7. APC, Université Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cité, F-75205 Paris (France)
  8. IFIC - Instituto de Física Corpuscular, Edificios Investigación de Paterna, CSIC - Universitat de València, Apdo. de Correos 22085, E-46071 Valencia (Spain)
  9. LAM - Laboratoire d'Astrophysique de Marseille, Pôle de l'Étoile Site de Château-Gombert, rue Frédéric Joliot-Curie 38, F-13388 Marseille Cedex 13 (France)
  10. INFN - Sezione di Bologna, Viale Berti-Pichat 6/2, I-40127 Bologna (Italy)
  11. Nikhef, Science Park, Amsterdam (Netherlands)
  12. INFN -Sezione di Roma, P.le Aldo Moro 2, I-00185 Roma (Italy)
Publication Date:
OSTI Identifier:
22365882
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 786; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; COORDINATES; COSMIC NEUTRINOS; ENERGY SPECTRA; FLUCTUATIONS; GALAXIES; GEV RANGE; MUON NEUTRINOS; NEUTRINO DETECTION; POINT SOURCES; SIGNALS; TELESCOPES