Search for counterpart to IceCube-200620A with ANTARES
ATel #13820; Alexis Coleiro (APC/Universite de Paris) and Damien Dornic (CPPM/CNRS) on behalf of the ANTARES Collaboration.
on 21 Jun 2020; 06:56 UT
Credential Certification: Antoine Kouchner (kouchner@apc.univ-paris-diderot.fr)
Subjects: >GeV, TeV, Neutrinos, Transient
Using data from the ANTARES detector, we have performed a follow-up analysis of the recently reported single track-like event IceCube-200620A (GCN#27997). The original reconstructed origin was 31.9 degrees below the horizon for ANTARES.
No up-going muon neutrino candidate events were recorded in a 3 deg cone around the location of the IceCube event coordinates (accounting for the reported uncertainties) during a +/- 1h time-window centered on the IceCube event time, and over which the potential source remained visible all time.
This leads to a preliminary 90% confidence level upper limit on the muon-neutrino fluence from a point source of about 15 GeV.cm^-2 over the energy range 5 TeV â4 PeV (the range corresponding to 5-95% of the detectable flux) for an E^-2 power-law spectrum, and about 30 GeV.cm^-2 (810 GeV - 405 TeV) for an E^-2.5 spectrum.
A search over an extended time window of +/- 1 day has also yielded no detection (44% visibility).
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.
