TITLE: GCN CIRCULAR NUMBER: 16635 SUBJECT: Correction to Fermi-LAT GCN Circular 16633 DATE: 14/07/29 16:29:24 GMT FROM: Elisabetta Bissaldi at U.Innsbruk/IAPP E. Bissaldi (University & INFN Trieste) and M. Arimoto (Tokyo Tech) report on behalf of the Fermi-LAT team: The number of LAT-detected photons reported in GCN 16633 is incorrect. There are only about 20 photons above 100 MeV and 4 photons above 1 GeV within 550 s. We apologize for the mistake.