TITLE: GCN CIRCULAR NUMBER: 18261 SUBJECT: Fermi GBM trigger 463422723/150908689 is not a GRB DATE: 15/09/08 18:32:26 GMT FROM: Peter Veres at UAH P. Veres reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 463422723/150908689 at 16:31:59.43 UT on 8 September 2015, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to a particle event."