TITLE: GCN CIRCULAR NUMBER: 33457 SUBJECT: Swift Trigger 1159438 is also due to the Star Tracker loss of lock. DATE: 23/03/11 20:03:01 GMT FROM: Kim Page at U.of Leicester K. L. Page (U Leicester) and T. M. Parsotan (GSFC/UMBC/CRESSTII) report on behalf of the Neil Gehrels Swift Observatory Team: Swift trigger 1159438 at 19:49:53 UT also occurred when the Star Tracker had lost lock, and is not believed to be an interesting astrophysical event.