{
  "bibcode": "2022GCN.31551....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2022-02-05 at 00:22:39.74 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 2.524 events per year due to atmospheric backgrounds. The IceCube detector was in a normal operating state at the time of detection.\n\nDue to a technical issue, the automated GCN notice for this event could not be circulated. More sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2022-02-05 \nTime:  00:22:39.74 UTC\nRA: 216.12 (+2.94, -3.52 deg  90% PSF containment) J2000\nDec: 15.56 (+3.26, -2.65 deg 90% PSF containment) J2000\nInitial signal probability: 32.2%\nInitial neutrino energy: 109.6 TeV\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 two Fermi 4FGL catalog sources in the 90% uncertainty region: 4FGL J1424.6+1447 and 4FGL J1428.1+1629. The nearest source is 4FGL J1424.6+1447 at RA: 216.17 deg, Dec: 14.78 deg in J2000 coordinates (0.78 deg away from the best-fit event 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": 31551,
  "createdOn": 1644072169000,
  "email": "jmsantander@ua.edu",
  "subject": "IceCube-220205A - IceCube observation of a high-energy neutrino candidate track-like event",
  "submitter": "Marcos Santander at U. Alabama/IceCube  <jmsantander@ua.edu>",
  "eventId": "IceCube-220205A"
}