{
  "submitter": "Giacomo Sommani at Ruhr-Universität Bochum <gsommani@icecube.wisc.edu>",
  "body": "The IceCube Collaboration (http://icecube.wisc.edu/) reports:\n\nOn 2024-03-27, at 16:12:30.47 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 Gold alerts is 30%. This alert has an estimated false alarm rate of 2.420 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/139205_9784024.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to:\n\nDate: 2024-03-27\nTime:  16:12:30.47 UT\nRA: 89.21 (+1.36, -1.55 deg  90% PSF containment) J2000\nDec: 0.93 (+1.23, -1.47 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\nFive known gamma-ray sources listed in the Fermi 4FGL-DR4 or 3FHL catalogs are located within the 90% uncertainty region of the event. The nearest one to the neutrino alert position is 4FGL J0555.9+0030, located at RA = 89.00 deg, Dec = 0.51 deg J2000, 0.47 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",
  "eventId": "IceCube-240327B",
  "createdOn": 1711563063144,
  "submittedHow": "web",
  "bibcode": "2024GCN.35984....1I",
  "subject": "IceCube-240327B - IceCube observation of a high-energy neutrino candidate track-like event",
  "circularId": 35984
}