Search for counterpart to IceCube-190124A with ANTARES
ATel #12423; Alexis Coleiro (APC) and Damien Dornic (CPPM/CNRS) on behalf of the ANTARES Collaboration
on 25 Jan 2019; 17:12 UT
Credential Certification: Antoine Kouchner (kouchner@apc.univ-paris-diderot.fr)
Subjects: >GeV, TeV, VHE, Neutrinos, Transient
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.
