TITLE: GCN CIRCULAR NUMBER: 9789 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 271833016 is not a GRB DATE: 09/08/13 14:55:14 GMT FROM: Andreas von Kienlin at MPE A. von Kienlin (MPE) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 271833016 at 05:10:14.79 UT on 13 August 2009, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to a Terrestrial Gamma-Ray Flash (TGF)."