TITLE: GCN CIRCULAR NUMBER: 23202 SUBJECT: Fermi GBM trigger 557852757/180905629 is not a GRB DATE: 18/09/05 15:27:43 GMT FROM: Peter Veres at UAH P. Veres (UAH) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 557852757/180905629 at 15:05:52.21 UT on 05 September 2018, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to particle activity."