{
  "bibcode": "2022GCN.31986....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2022-05-01 at 22:50:58.64 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 2.110 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/136588_56014830.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2022-05-01\nTime:  22:50:58.64 UT\nRA: 311.57 (+0.82, -1.07 deg  90% PSF containment) J2000\nDec: 18.68 (+1.08, -0.92 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\nThere are no known gamma-ray sources in the 90% containment region for the event. The nearest source in the 4FGL-DR3 Fermi-LAT catalog is 4FGL J2043.3+1711 (310.84 deg, 17.19 deg J2000, 1.65 deg away from the best-fit neutrino candidate position).\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",
  "circularId": 31986,
  "createdOn": 1651451285000,
  "email": "jmsantander@ua.edu",
  "subject": "IceCube-220501A - IceCube observation of a high-energy neutrino candidate track-like event",
  "submitter": "Marcos Santander at U. Alabama/IceCube  <jmsantander@ua.edu>",
  "eventId": "IceCube-220501A"
}