TITLE: GCN CIRCULAR NUMBER: 13264 SUBJECT: Swift Trigger 520928 is a noise event DATE: 12/04/26 16:00:51 GMT FROM: Scott Barthelmy at NASA/GSFC S.D. Barthelmy and H.A. Krimm (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 520928 (Barthelmy, et al., GCN Circ. 13262) is due to positive noise fluctuation in the BAT image.