TITLE: GCN CIRCULAR NUMBER: 14932 SUBJECT: Swift Trigger 559108 is not astrophysical DATE: 13/06/26 21:43:03 GMT FROM: Jamie A. Kennea at PSU/Swift-XRT N. Gehrels (NASA/GSFC), S. T. Holland (STScI), J. A. Kennea (PSU), H. A. Krimm (CRESST/GSFC/USRA), C. B. Markwardt (NASA/GSFC), F. E. Marshall (NASA/GSFC) and S. R. Oates (UCL-MSSL) report on behalf of the Swift Team: At 21:08:37 UT, the Swift Burst Alert Telescope (BAT) triggered on trigger=559108. Swift slewed immediately to the location. However, we believe that this was an erroneous trigger on a bright source for which the BAT flight software used the incorrect attitude. Therefore, we believe that trigger 559108 is neither a GRB nor the catalog source IGR_J11215-5952, nor any other astrophysical event.