TITLE: GCN CIRCULAR NUMBER: 19895 SUBJECT: Swift Trigger 711158 is not an astrophysical event DATE: 16/09/06 02:21:48 GMT FROM: David Palmer at LANL P. D'Avanzo (INAF-OAB), J. A. Kennea (PSU), A. Melandri (INAF-OAB), D. M. Palmer (LANL) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team: At 02:08:23 UT, the Swift Burst Alert Telescope (BAT) triggered on residual sidelobes in the image produced by Vela X-1. This does not represent significant astrophysical activity.