Search for counterpart to NuEm-211209A with ANTARES
ATel #15101; Alexis Coleiro (APC/Universite de Paris) and Damien Dornic (CPPM/CNRS) on behalf of the ANTARES Collaboration.
on 10 Dec 2021; 13:33 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 AMON IC-HAWC coincidence NuEm-211209A alert (GCN#31192).
No up-going muon neutrino candidate events were detected within 3 degrees from the coincidence coordinates over a time period [12/09/2021 00h50 - 04h39 UTC] corresponding to 75% of the HAWC transit time mentioned in the AMON notice, and during which the potential source remained visible in the up-going field of view of ANTARES.
This leads to a preliminary 90% confidence level upper limit on the muon-neutrino radiant fluence from a point source of about 15 GeV.cm^-2 over the energy range 3 TeV â 3.3 PeV (the range corresponding to 5-95% of the detectable flux) for an E^-2 power-law spectrum, and about 26 GeV.cm^-2 (0.5 - 290 TeV) for an E^-2.5 spectrum. These indicative limits have been computed for the end of the HAWC transit time.
A search over an extended time window of +/-1 day has also yielded no detection (53% visibility).
ANTARES [http://antares.in2p3.fr/] 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.
