GCN Circular 23793
Subject
Search for counterpart to IceCube-190124A with ANTARES
Date
2019-01-25T17:20:49Z (5 years ago)
From
Damien Dornic at CPPM,France <dornic@cppm.in2p3.fr>
Alexis Coleiro (APC) and Damien Dornic (CPPM) report on behalf of the ANTARES Collaboration:
Using data from the ANTARES detector, we have performed a follow-up analysis
of the recently reported single high-energy starting event (HESE) neutrino
IceCube-190124A (GCN 23785). The reconstructed origin was 44 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 (70% visibility). This leads to a preliminary 90% confidence
level upper limit on the muon-neutrino fluence from a point source of 15
GeV.cm^-2 over the energy range 3.1 TeV - 3.6 PeV (the range corresponding
to 5-95% of the detectable flux) for an E^-2 power-law spectrum, and 25
GeV.cm^-2 (610 GeV - 316 TeV) for an E^-2.5 spectrum.
ANTARES is the largest neutrino detector installed in the 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.