TITLE: GCN CIRCULAR NUMBER: 13538 SUBJECT: Swift Trigger 529076 is from Swift J1910.2-0546 and is not a GRB DATE: 12/07/29 18:16:45 GMT FROM: Hans Krimm at NASA-GSFC H. A. Krimm (CRESST/GSFC/USRA) for the Swift team Further analysis of the Swift/BAT event data from Trigger 529076 (GCN Circ 13527, Chester et al) yields a significance of 5.4-sigma. Over the time range we have data (T-120 to T+180 sec), the mask-weighted light curve shows constant emission with no significant features on time scales typical of a gamma-ray burst. Therefore we conclude that this trigger was not due to a GRB. The XRT and UVOT positions reported in GCN Circ 13530 are consistent within reported errors of the position for Swift J1910.2-0546 (ATel #4144; Rau, Greiner, and Schady). Also this source has been steadily brightening in the BAT hard X-ray transient monitor (average of 0.021 ± 0.001 ct/s/cm^2 (~100 mCrab) in the 15-50 keV band for 28-July-2012). Therefore we conclude that Trigger 529076 was caused by Swift J1910.2-0546, but that low statistics in the trigger interval yielded a BAT position inconsistent with this known source. [GCN OPS NOTE(29jul12): Per author's request, "13530, Ukwatta" was changed to "13527, Chester".]