Search for a neutrino counterpart to the X-ray and millisecond radio bursts observed from SGR 1935+2154, with ANTARES
ATel #13721; Alexis Coleiro (APC/Universite de Paris) and Damien Dornic (CPPM/CNRS) on behalf of the ANTARES Collaboration
on 8 May 2020; 20:58 UT
Credential Certification: Antoine Kouchner (kouchner@apc.univ-paris-diderot.fr)
Subjects: Radio, X-ray, Neutrinos, Transient, Fast Radio Burst, Magnetar
Using data from the ANTARES detector, we have searched for up-going muon neutrino candidates from the direction of SGR 1935+2154 (ATel #13675, #13678, #13679, #13681, #13682, #13685, #13686, GCN #27657, #27661) in a time window of +/- 1h around the time of the trigger from the CHIME/FRB observed radio burst (14:34:33 UTC). At this time, the source was located 19 degrees below the horizon for ANTARES, and remained visible over the whole +/- 1h time window.
No up-going muon neutrino candidate events were recorded at the location of the source.
This leads to a preliminary 90% confidence level upper limit on the muon-neutrino fluence from a point source of 14 GeV.cm^-2 over the energy range 5.6 TeV â 5.4 PeV (the range corresponding to 5-95% of the detectable flux) for an E^-2 power-law spectrum, and 30 GeV.cm^-2 (1 TeV - 515 TeV) for an E^-2.5 spectrum.
A search over an extended time window of +/- 1 day has also yielded no detection (38% 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.
