Searches for point-like sources of cosmic neutrinos with 11 years of ANTARES data

TL;DR

This paper reports an updated search for cosmic point-like neutrino sources using 11 years of ANTARES data, including correlations with IceCube events and specific astrophysical sources, aiming to identify neutrino origins.

Contribution

It provides an extended analysis with 11 years of data, including new correlation searches with IceCube events and specific astrophysical objects, enhancing previous point-source searches.

Findings

No significant point-like sources detected.

Correlations with IceCube events are consistent with background expectations.

Constraints set on neutrino fluxes from candidate sources.

Abstract

The main goal of the ANTARES neutrino telescope is the identification of neutrinos from cosmic accelerators. The good visibility towards the Southern sky for neutrino energies below 100 TeV and the good angular resolution for reconstructed events make the telescope excellent to test for the presence of point-like sources, especially of Galactic origin. The median angular resolution for track-like events (mainly from $\nu_{\mu}$ CC interactions) is $0.4^{\circ}$ while the median angular resolution for contained shower-like events (mainly from $\nu_{e}$ CC and all-flavour NC interactions) is $3^{\circ}$. Recently the ANTARES Collaboration published the result of the search for cosmic point-like neutrino sources using track-like and shower-like events collected during nine years of data taking. In this contribution, an update to this analysis using eleven years of data recorded between early 2007 and the end of 2017, for a total livetime of 3136 days, is presented. Moreover, the results of a search for time and space correlation between the ANTARES events and 54 IceCube tracks and those of the searches for neutrino candidates associated with the IceCube-170922A event or from the direction of the TXS 0506+056 blazar are reported.