TITLE: GCN CIRCULAR NUMBER: 32102 SUBJECT: IceCube-220524A - IceCube observation of a high-energy neutrino candidate track-like event DATE: 22/05/24 10:48:02 GMT FROM: Dr. Massimiliano Lincetto at Ruhr-Universitaet Bochum The IceCube Collaboration (http://icecube.wisc.edu/) reports: On 2022-05-24 at 07:41:32.185 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 2.8556 events per year due to atmospheric backgrounds. The IceCube detector was in a normal operating state at the time of detection. After the initial automated alert (https://gcn.gsfc.nasa.gov/notices_amon_g_b/136662_35405932.amon), more��sophisticated reconstruction algorithms have been applied offline, with the direction refined to: Date: 2022-05-24 Time: 07:41:32.185 UT RA: +47.20 (+4.21/-2.51 deg 90% PSF containment) J2000 Dec: -3.28 (+0.77/-0.89 deg 90% PSF containment) J2000 We encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source for the candidate neutrino. There are no Fermi 4FGL or 3FHL catalog sources in the 90% uncertainty region. The nearest gamma-ray source in either catalog is 4FGL J0307.8-0419 at RA: +46.95 deg, Dec: -4.33 deg (2.06 deg away from the best-fit event position). The 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