TITLE: GCN CIRCULAR NUMBER: 18305 SUBJECT: Fermi GBM trigger 463890496/150914103 is not a GRB DATE: 15/09/14 03:30:22 GMT FROM: Matthew Stanbro at UAH/Fermi M. Stanbro reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 463890496/150914103 at 02:28:12.27 UT on 14 September 2015, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is believed to be accidental due to South Atlantic Anomaly (SAA) entry."