TITLE: GCN CIRCULAR NUMBER: 18206 SUBJECT: Fermi GBM trigger 150827524 is not a GRB DATE: 15/08/28 13:23:39 GMT FROM: Hoi-Fung Yu at MPE H.-F. Yu reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 462371689/150827524 at 12:34:45.73 UT on the 27 August 2015, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to a particle event."