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 locate...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2014-05, Vol.786 (1), p.1-5
Main Authors: Adrian-Martinez, S, Albert, A, Andre, M, ANGHINOLFI, M, Anton, G, Ardid, M, Aubert, J-J, Baret, B, Barrios-Marti, J, Basa, S
Format: Article
Language:English
Subjects:
Astrofísica
Astronomia i astrofísica
Astroparticle physics
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Confidence intervals
COORDINATES
COSMIC NEUTRINOS
ENERGY SPECTRA
Fluctuation
FLUCTUATIONS
Flux
Física
GALAXIES
Galaxy: center
GEV RANGE
High Energy Astrophysical Phenomena
High Energy Physics - Experiment
Instrumentation and Methods for Astrophysic
MUON NEUTRINOS
Muons
Neutrino astrophysics
NEUTRINO DETECTION
Neutrinos
Neutrins
Physics
POINT SOURCES
Sciences of the Universe
Searching
SIGNALS
TELESCOPES
Àrees temàtiques de la UPC
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Summary: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[degrees].8 and decl. = -64[degrees].9 and corresponds to a 2.2[sigma] background fluctuation. In addition, upper limits on the flux normalization of an E super(-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 super(-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 X 10 super(-8) GeV cm super(-2) s super(-1), depending on the exact location of the source.
ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/786/1/L5