TITLE: GCN CIRCULAR NUMBER: 19544 SUBJECT: Fermi GBM trigger 488128598/160620637 is not a GRB DATE: 16/06/20 16:48:51 GMT FROM: Matthew Stanbro at UAH/Fermi M. Stanbro (UAH) and R. Hamburg (UAH) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 488128598/160620637 at 15:16:34.88 UT on 20 June 2016, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to a SGR."