GCN Circular 31516
Subject
Fermi-LAT-ANTARES 220121a: upper limits from a search for coincident neutrinos with IceCube
Date
2022-01-21T21:07:12Z (2 years ago)
From
Alex Pizzuto at ICECUBE/U of Wisconsin <pizzuto@wisc.edu>
The IceCube Collaboration (http://icecube.wisc.edu/) reports:
IceCube has performed a search for track-like muon neutrino events arriving from the best-fit localization region of the recent coincidence between one ANTARES neutrino and one Fermi LAT photon (https://gcn.gsfc.nasa.gov/gcn3/31514.gcn3). The search was performed using a time window one day in duration centered on the alert time (2022-01-20 13:02:01 UTC to 2022-01-21 13:02:01 UTC), during which IceCube was collecting good quality data. We find that the data are consistent with atmospheric background expectations, with a p-value of 1. We accordingly derive a time-integrated muon-neutrino flux upper limit for this source of E^2 dN/ dE = 9.3 x 10^-4 TeV cm^-2 at 90% CL, under the assumption of an E^-2 power law. 90% of events IceCube would detect from a source at this declination with an E^-2 spectrum have energies in the approximate energy range between 100 TeV and 20 PeV.
The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc@icecube.wisc.edu<mailto:roc@icecube.wisc.edu>.