TITLE:   GCN CIRCULAR
NUMBER:  37614
SUBJECT: AMON Coincidence Alert from the sub-threshold IceCube-HAWC search NuEm-240926A
DATE:    24/09/26 19:34:25 GMT
FROM:    Hugo Ayala at Pennsylvania State University <hgayala@psu.edu>

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 6.06 hours.

The HAWC transit interval starts from 2024/09/26 13:12:19 UT  to
2024/09/26 19:01:26 UT
(End of the HAWC transit time)

The location of the coincidence is reported as
RA (J2000): 149.97 deg
Dec (J2000): 46.22 deg
Location uncertainty (50% containment): 0.22 deg (statistical only).
Location uncertainty (90% containment): 0.41 deg (statistical only).

The false alarm rate (FAR) of this coincidence is 3.41 per year.
We encourage follow-up observations of the alert region contingent on
the availability of resources and interest, given the quoted FAR.

A quick search in the region reveals the 4FGL source J0959.6+4606
it's ~0.1 deg away from the coincidence position.
Other 4FGL sources that appear nearby are J0958.0+4728, J1008.1+4706
and J0950.2+4553

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 https://www.amon.psu.edu/
Information on the IceCube collaboration: http://icecube.wisc.edu/
Information on the HAWC collaboration: https://www.hawc-observatory.org