TITLE: GCN GRB OBSERVATION REPORT NUMBER: 4115 SUBJECT: Swift-BAT trigger 160619 is not a GRB DATE: 05/10/21 14:44:22 GMT FROM: Scott Barthelmy at NASA/GSFC S. Barthelmy (GSFC) and T. Sakamoto (GSFC) on behalf of the Swift-BAT team: The Swift-BAT trigger (trigger=160619) at 12:12:33 UT on 21 Oct 2005 is not due to a GRB or any other astrophysical source. Using the full event-by-event data from the recent telemetry downlink, all 70 events in the trigger occurred within a single 100 microsec timestamp sampling of the individual events. This trigger was due to a cosmic shower event in BAT.