TITLE: GCN CIRCULAR NUMBER: 18262 SUBJECT: Swift Trigger 654954 is not an astrophysical event DATE: 15/09/08 22:08:27 GMT FROM: David Palmer at LANL S. D. Barthelmy (GSFC), N. P. M. Kuin (UCL-MSSL), K. L. Page (U Leicester), D. M. Palmer (LANL), B. Sbarufatti (INAF-OAB/PSU) and T. N. Ukwatta (LANL) report on behalf of the Swift Team: At 21:38:08 UT, the Swift Burst Alert Telescope (BAT) detected the commonly-seen source GRS 1915+105 (trigger=654954) but misidentified it as different, rarely-seen source due to a known race condition in the onboard software. This is not an astrophysical interesting event.