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GCN Circular 26922

Fermi-LAT ANTARES coincidence: IceCube neutrino search
2020-01-28T22:37:33Z (4 years ago)
Alex Pizzuto at ICECUBE/U of Wisconsin <>
The IceCube Collaboration ( reports:

IceCube has performed a search for track-like muon neutrino events arriving from the direction of the Fermi-LAT-ANTARES coincidence  ( in a centered two-day time window (2020-01-26 18:52:02.95 UTC to 2020-01-28 18:52:02.95 UTC), during which IceCube was collecting good quality data.  The time window of the search contains GW event S200128d (, that follows approximately 7.5 hours later and is spatially coincident (50% credible region). Zero track-like events are found in spatial coincidence with the Fermi-LAT-ANTARES coincidence during this time period. We accordingly derive a time-integrated muon-neutrino flux upper limit at the reported location of E^2 dN/ dE = 9.32 x 10^-4 TeV cm^-2 at 90% CL, under the assumption of an E^-2 power law. The southern declination of this coincidence suppresses IceCube���s sensitivity to TeV neutrinos, and 90% of events IceCube would detect from a source at this declination with an E^-2 spectrum are approximately between 100 TeV and 40 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<>.
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