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

Journal Article · Thu May 01 00:00:00 EDT 2014 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/786/1/L5· OSTI ID:22365882

Adrián-Martínez, S.; Ardid, M.; Bou-Cabo, M. ^[1]; Albert, A. ^[2]; André, M. ^[3]; Anghinolfi, M. ^[4]; Anton, G. ^[5]; Aubert, J. -J.; Bertin, V.; Brunner, J.; Busto, J. ^[6]; Baret, B. ^[7]; Barrios-Martí, J. ^[8]; Basa, S. ^[9]; Biagi, S. ^[10]; Bogazzi, C.; Bormuth, R.; Bouwhuis, M. C.; Bruijn, R. ^[11]; Capone, A. ^[12] ; others, and

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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)

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.

• OSTI ID: 22365882
• Journal Information: Astrophysical Journal Letters, Vol. 786, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
COORDINATES
COSMIC NEUTRINOS
ENERGY SPECTRA
FLUCTUATIONS
GALAXIES
GEV RANGE
MUON NEUTRINOS
NEUTRINO DETECTION
POINT SOURCES
SIGNALS
TELESCOPES