TITLE: GCN CIRCULAR NUMBER: 21077 SUBJECT: Trigger 751928: Swift misidentification of Cen X-3 DATE: 17/05/08 12:50:52 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC), A. A. Breeveld (UCL-MSSL), J. R. Cummings (NASA/UMBC), S. W. K Emery (UCL-MSSL), N. P. M. Kuin (UCL-MSSL), K. L. Page (U Leicester) and B. Sbarufatti (INAF-OAB/PSU) report on behalf of the Swift Team: At 12:23:00 UT, due to a known race condition in the Swift/BAT software, BAT misidentified Cen X-3 as a different source (Trigger 751928). Cen X-3 was at its typical flux level. This is not an interesting astrophysical event.