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GCN Circular 33470

AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-230313A
2023-03-13T14:13:04Z (6 months 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 5.08 hours.

The HAWC transit interval starts from 2023/03/13 05:43:03 UT -
2023/03/13 11:59:46 UT
(End of the HAWC transit time)

The location of the coincidence is reported as
RA (J2000): 206.01 deg
Dec (J2000): 16.16 deg
Location uncertainty (50% containment): 0.13 deg (statistical only).
Location uncertainty (90% containment): 0.24 deg (statistical only).

The false alarm rate (FAR) of this coincidence is 3.32 per year.
We encourage follow-up observations of the alert region contingent on
the 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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