Abstract
Antares, the first undersea neutrino telescope, has been continuously operating since 2007 in the Mediterranean Sea. The transparency of the water allows for a very good angular resolution in the reconstruction of neutrino events of all flavors. This results in an unmatched sensitivity for neutrino source searches, in a large fraction of the Southern Sky, at TeV energies. As a consequence, Antares provides valuable constraints on the origin of the cosmic neutrino flux discovered by the IceCube Collaboration. Based on an all-flavor dataset spanning nine years of operation of the detector, the latest results of Antares searches for neutrino point sources, and for diffuse neutrino emission from the entire sky as well as from several interesting regions such as the Galactic Plane, are presented. Several results have been obtained through a joint analysis with the IceCube Collaboration. Concerning the multi-messenger program, the focus is made on the follow-up searches of IceCube alerts, in particular the one related to the TXS 0506+056 blazar, thought to be the first extragalactic high-energy neutrino source identified so far.
Highlights
The field of neutrino astronomy has made a major step forward with the detection, in 2013, of diffuse-like high-energy (HE) emission of neutrinos (>TeV) across the whole sky, by the IceCube experiment [1,2,3]
Since neutrinos only interact through the weak force, they can probe denser media than other cosmic messengers such as gamma-rays. They can probe the universe over large distances, offering access to cosmological sources. This property turns at the same time into a detection challenge that can only be overcome through the instrumentation of km-scale detectors to compensate for the weaknesses of the interaction cross section and of the cosmic fluxes
Despite the great intensity of the cosmic neutrino flux reported by the IceCube Collaboration, the size of the Antares detector remains too small for a high significance confirmation
Summary
Antoine Kouchner1,∗ on behalf of the Antares Collaboration 1AstroParticle and Cosmology (APC) University Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cité, 75205 Paris, France at Institut Universitaire de France, 75005 Paris
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