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GCN Circular 29287

AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-210111A
2021-01-11T14:35:13Z (3 years ago)
Hugo Ayala at Pennsylvania State University <>
The AMON,  IceCube, and HAWC collaborations report:

The AMON NuEm stream channel found a coincidence alert from the
IceCube online neutrino selection + HAWC daily monitoring analysis.
The analysis looks for IceCube neutrino events -mostly atmospheric
in origin- around the position and transit time of a HAWC cluster of
likely gamma rays, as identified in the integrated observations from
a single transit, in this case having a duration of 5.99 hours.

The HAWC transit interval starts  from 01-11-2021 06:47:00 UT to
01-11-2021 13:06:41 UT
(End of the HAWC transit time)

The location of the coincidence is reported as
RA (J2000): 162.34deg
Dec (J2000): 19.46 deg
Location uncertainty (50% containment): 0.37 deg (statistical only).
Location uncertainty (90% containment): 0.67 deg (statistical only).

The false alarm rate (FAR) of this coincidence is 3.85 per year.
We encourage follow-up observations of the alert region contingent on
availability of resources and interest, given the quoted FAR.

AMON seeks to perform a real-time correlation analysis of the
high-energy signals across all known astronomical messengers. More
information about AMON can be found in
Information on the IceCube collaboration:
Information on the HAWC collaboration:
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