Abstract
ANTARES is the first deep under-sea high-energy astrophysical neutrino telescope, in operation since 2008, in the Northern Hemisphere. In the light of a multi-messenger approach, one of the most ever intense (photon fluence Fγ ≃10-3 erg/cm2) and close (redshift z = 0.34) transient γ-source, GRB130427A, is considered in the ANTARES physics program for a co-incident search for photons and high-energy neutrinos. The first time-dependent analysis on GRBs neutrino emissions has been performed for this source: Konus-Wind parameters of the γ time-dependent spectrum are used to predict the expected neutrino flux from each peak of the burst, through the numerical calculation code NeuCosmA. An extended maximum likelihood ratio search is performed in order to maximize the discovery probability of prompt neutrinos from the burst: at the end, ANTARES sensitivity to this source is evaluated to be E2Φv ∼ 1 -10 GeV/cm2 in the energy range from 2 x 105 GeV to 2 x 107 GeV.
Highlights
The ANTARES neutrino telescope ([1]) is a three dimensional array of photo-multiplier tubes (PMTs), located at a depth of 2475 m in the Mediterranean Sea, offshore Toulon (France)
The main scientific goals of ANTARES are the identification of neutrino astrophysical sources and the observation of a neutrino flux exceeding the atmospheric one
The PMTs are oriented at 45◦ downwards in order to maximize the sensitivity to Cherenkov light from upward-going muons: for these events the main background component is constituted of muons induced by atmospheric neutrinos
Summary
The ANTARES neutrino telescope ([1]) is a three dimensional array of photo-multiplier tubes (PMTs), located at a depth of 2475 m in the Mediterranean Sea, offshore Toulon (France).
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