TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3160 SUBJECT: Retraction of three Swift GRB triggers DATE: 05/03/31 21:17:08 GMT FROM: David Burrows at PSU/Swift N. Gehrels (GSFC), J. A. Nousek (PSU), S. Barthelmy (GSFC), D. N. Burrows, P. Roming (PSU), report on behalf of the Swift team: The Swift team reported three GRBs earlier today, but has now determined that all of these triggers (BAT triggers 112977, 112981, and 112982; GCN Circulars #3155, 3156, 3157, 3158) were due to Vela X-1. The positions were assigned incorrectly due to attitude errors on the spacecraft. All of these triggers are being retracted. Swift has not found a true GRB yet today.