{
  "submittedHow": "web",
  "submitter": "Massimiliano Lincetto at Ruhr-Universitaet Bochum <lincetto@astro.ruhr-uni-bochum.de>",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2023-08-23 at 08:26:14.59 UT IceCube detected a track-like event with a high probability of being of astrophysical origin. The event was selected by the ICECUBE_Astrotrack_GOLD alert stream. The average astrophysical neutrino purity for Gold alerts is 50%. This alert has an estimated false alarm rate of 0.5131 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/138283_14780365.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2023-08-23\nTime:  08:26:14.59 UT\nRA: 17.93 (+0.36, -0.38 deg  90% PSF containment) J2000\nDec: -12.10 (+0.23, -0.24 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-DR4 or 3FHL catalog sources in the 90% uncertainty region of the event. The nearest gamma-ray source in either catalog is 4FGL J0110.7-1254 at RA: 17.69 deg, Dec: -12.91 deg (0.84 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",
  "bibcode": "2023GCN.34527....1I",
  "subject": "IceCube-230823A - IceCube observation of a high-energy neutrino candidate track-like event",
  "createdOn": 1692798738661,
  "eventId": "IceCube-230823A",
  "circularId": 34527
}