TITLE: GCN CIRCULAR NUMBER: 31543 SUBJECT: IceCube-220202A: IceCube observation of a high-energy neutrino candidate track-like event DATE: 22/02/02 14:19:28 GMT FROM: Cristina Lagunas Gualda at DESY The IceCube Collaboration (http://icecube.wisc.edu/) reports: On 2022-02-02 at 11:48:38.59 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 1.925 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/136241_22093816.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to: Date: 2022-02-02 Time: 11:48:38.59 UTC RA: 21.36 (+1.10, -0.77 deg 90% PSF containment) J2000 Dec: -3.88 (+0.42, -0.64 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 J0124.8-0625 at RA: 21.22 deg, Dec: -6.43 deg (2.56 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