TITLE: GCN CIRCULAR NUMBER: 43866 SUBJECT: IceCube cascade alert 142200_1517143 retraction DATE: 26/02/27 20:54:47 GMT FROM: Erik Blaufuss at University of Maryland, College Park <blaufuss@umd.edu> The IceCube Collaboration (http://icecube.wisc.edu/) reports: On 27 Feb 26 01:26:48 UT IceCube issued a cascade alert (https://gcn.gsfc.nasa.gov/notices_amon_icecube_cascade/142200_1517143.amon) reporting the detection of a neutrino candidate event with a high probability of being of astrophysical origin. Upon further examination by the IceCube collaboration, the event was found to be likely due to unintended light emission from detector equipment. At the time of this alert, portions of the detector hardware were found to unintentionally producing light in the instrumented volume. Normally, these periods of operation should be excluded from generating alerts. We apologize for any confusion this error may have caused. 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/43866. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...