{
  "submittedHow": "web",
  "createdOn": 1760491867881,
  "format": "text/plain",
  "submitter": "Erik Blaufuss at University of Maryland, College Park <blaufuss@umd.edu>",
  "subject": "IceCube-251014A - IceCube observation of a high-energy neutrino candidate track-like event",
  "bibcode": "2025GCN.42277....1I",
  "circularId": 42277,
  "eventId": "IceCube-251014A",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 25-10-14 at 18:33:11.58 UT IceCube detected a track-like event with a moderate probability of being of astrophysical origin.  The event was selected by the ICECUBE_Astrotrack_BRONZE alert stream.  The average astrophysical neutrino purity for Bronze alerts is 30%.  This alert has an estimated false alarm rate of 2.226 events per year due to atmospheric  backgrounds.  The IceCube detector was in a normal operating state at the time of detection.\n\nAfter the initial automated alert (https://gcn.gsfc.nasa.gov/notices_amon_g_b/141484_75492250.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 25-10-14\nTime: 18:33:11.58 UT\nRA: 2.81 (+0.48/-0.49 deg 90% PSF containment) J2000\nDec: 2.91 (+0.49/-0.49 deg 90% PSF containment) J2000\n\nWe encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source for the candidate neutrino.\n\nNo known gamma-ray sources listed in the Fermi 4FGL-DR4 or 3FHL catalogs are located within the 90% uncertainty region of the event.\n\nThe 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\n"
}