TITLE: GCN CIRCULAR NUMBER: 19418 SUBJECT: Fermi GBM trigger 484574960/160510506 is not a GRB DATE: 16/05/10 13:09:56 GMT FROM: Oliver Roberts at UCD/Fermi O.J. Roberts (UCD) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 484574960/160510506 at 12:09:16.35 UT on 10 May 2016, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to particle activity."