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Search for counterpart to IceCube-191119Awith ANTARES

ATel #13299; Alexis Coleiro (APC/Universite de Paris) and Damien Dornic (CPPM/CNRS) on behalf of the ANTARES Collaboration.
on 20 Nov 2019; 20:53 UT
Credential Certification: Antoine Kouchner (kouchner@apc.univ-paris-diderot.fr)

Subjects: >GeV, TeV, Neutrinos, Transient

Alexis Coleiro (APC/Universite de Paris) and Damien Dornic (CPPM/CNRS) on behalf of the ANTARES Collaboration.

Using data from the ANTARES detector, we have performed a follow-up analysis of the recently reported single track-like event IceCube-191119A (GCN 26258 ). The reconstructed origin was 37.0 degrees below the horizon for ANTARES.

No up-going muon neutrino candidate events were recorded within 3 degrees of the IceCube event coordinates during a +/- 1h time-window centered on the IceCube event time, and over which the potential source remained visible all time. A search over an extended time window of +/- 1 day has also yielded no detection (48% visibility).

This leads to a preliminary 90% confidence level upper limit on the muon-neutrino fluence from a point source of 16 GeV.cm^-2 over the energy range 3.4 TeV - 3.6 PeV (the range corresponding to 5-95% of the detectable flux) for an E^-2 power-law spectrum, and 28 GeV.cm^-2 (656 GeV - 338 TeV) for an E^-2.5 spectrum.

ANTARES is the largest undersea neutrino detector (Mediterranean Sea) and it is primarily sensitive to astrophysical neutrinos in the TeV-PeV energy range. At 10 TeV, the median angular resolution for muon neutrinos is about 0.5 degrees. In the range 1-100 TeV ANTARES has a competitive sensitivity to this position in the sky.