{
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2023-07-27 at 16:05:39.63 UT IceCube detected a track-like event with a high 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 3.384 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/138198_44334860.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2023-07-27\nTime:  16:05:39.63 UT\nRA: 33.66 (+1.16, -0.77 deg  90% PSF containment) J2000\nDec: 7.63 (+0.70, -0.64 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 Fermi 4FGL-DR3 or 3FHL catalog sources in the 90% uncertainty region. The nearest gamma-ray source in either catalog is 4FGL J0219.5+0724 at RA: 34.89 deg, Dec: 7.41 deg (1.25 deg away from the best-fit alert 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\n",
  "circularId": 34276,
  "eventId": "IceCube-230727A",
  "submittedHow": "web",
  "submitter": "Erik Blaufuss at University of Maryland, College Park <blaufuss@umd.edu>",
  "bibcode": "2023GCN.34276....1I",
  "subject": "IceCube-230727A - IceCube observation of a high-energy neutrino candidate track-like event",
  "createdOn": 1690488551035
}