TITLE: GCN CIRCULAR NUMBER: 13240 SUBJECT: Swift Trigger 519874 is a noise event DATE: 12/04/11 13:02:05 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC) on behalf of the Swift-BAT team: Using the data set from T-60 to T+243 sec from recent telemetry downlinks, we confirm that BAT trigger 519874 (Barthelmy, et al., GCN Circ. 13238) is due to noise in the BAT detector (specifically a cosmic ray shower in the instrument).