{
  "bibcode": "2022GCN.32102....1I",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\n\nOn 2022-05-24 at 07:41:32.185 UT IceCube detected a track-like event \nwith a moderate probability of being of astrophysical origin.\n\n\nThe event was selected by the ICECUBE_Astrotrack_Bronze alert stream. \nThe average astrophysical neutrino purity for Bronze alerts is 30%. This \nalert has an estimated false alarm rate of 2.8556 events per year due to \natmospheric backgrounds. The IceCube detector was in a normal operating \nstate at the time of detection.\n\n\nAfter the initial automated alert \n(https://gcn.gsfc.nasa.gov/notices_amon_g_b/136662_35405932.amon), \nmore��sophisticated reconstruction algorithms have been applied offline, \nwith the direction refined to:\n\n\nDate: 2022-05-24\n\nTime: 07:41:32.185 UT\n\nRA: +47.20 (+4.21/-2.51 deg 90% PSF containment) J2000\n\nDec: -3.28 (+0.77/-0.89 deg 90% PSF containment) J2000\n\n\nWe encourage follow-up by ground and space-based instruments to help \nidentify a possible astrophysical source for the candidate neutrino.\n\n\nThere are no Fermi 4FGL or 3FHL catalog sources in the 90% uncertainty \nregion. The nearest gamma-ray source in either catalog is 4FGL \nJ0307.8-0419 at RA: +46.95 deg, Dec: -4.33 deg (2.06 deg away from the \nbest-fit event position).\n\n\nThe IceCube Neutrino Observatory is a cubic-kilometer neutrino detector \noperating at the geographic South Pole, Antarctica. The IceCube realtime \nalert point of contact can be reached at roc@icecube.wisc.edu",
  "circularId": 32102,
  "createdOn": 1653389282000,
  "email": "lincetto@astro.rub.de",
  "subject": "IceCube-220524A - IceCube observation of a high-energy neutrino candidate track-like event",
  "submitter": "Dr. Massimiliano Lincetto at Ruhr-Universitaet Bochum  <lincetto@astro.rub.de>",
  "eventId": "IceCube-220524A"
}