TITLE: GCN CIRCULAR NUMBER: 43374 SUBJECT: IceCube-260111A - IceCube observation of a high-energy neutrino candidate track-like event DATE: 26/01/11 22:48:41 GMT FROM: Giacomo Sommani at Ruhr-Universität Bochum <gsommani@icecube.wisc.edu> The IceCube Collaboration (http://icecube.wisc.edu/) reports: On 26-01-11 at 20:10:33.91 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 0.7434 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/141893_3811884.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to: Date: 26-01-11 Time: 20:10:33.91 UT RA: 70.88 (+1.55/-1.4 deg 90% PSF containment) J2000 Dec: 34.59 (+0.76/-0.64 deg 90% PSF containment) J2000 One gamma-ray source from the Fermi 4FGL-DR4 catalog is located within the 90% uncertainty region of this event: 4FGL J0444.6+3425, at RA = 71.16° and Dec = 34.42° (J2000), with an angular separation of 0.29° 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 View this GCN Circular online at https://gcn.nasa.gov/circulars/43374. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...