{
  "bibcode": "2022GCN.31762....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2022-03-17 at 02:32:17.68 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 1.899 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/136441_11435033.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2022-03-17\nTime:  02:32:17.68 UT\nRA: 155.74 (+2.23, -1.74 deg  90% PSF containment) J2000\nDec: 11.19 (+1.00, -1.39 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\nOne gamma-ray source listed in the 4FGL-DR2 Fermi-LAT catalog is located within the 90% uncertainty region: 4FGL J1018.9+1043 (154.74 deg, 10.73 deg J2000, 1.08 deg away from the best-fit neutrino 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": 31762,
  "createdOn": 1647488048000,
  "email": "jmsantander@ua.edu",
  "subject": "IceCube-220317A - IceCube observation of a high-energy neutrino candidate track-like event",
  "submitter": "Marcos Santander at U. Alabama/IceCube  <jmsantander@ua.edu>",
  "eventId": "IceCube-220317A"
}