TITLE: GCN CIRCULAR NUMBER: 23178 SUBJECT: Fermi GBM trigger 557008382/180826856 is not a GRB DATE: 18/08/26 21:38:15 GMT FROM: Rachel Hamburg at UAH R. Hamburg (UAH) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 557008382/180826856 at 20:32:57.78 UT on 26 August 2018, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to local particles."