TITLE: GCN CIRCULAR NUMBER: 18412 SUBJECT: Swift Trigger 658045 is not a GRB DATE: 15/10/08 06:11:38 GMT FROM: David Palmer at LANL C. Gronwall (PSU), K. L. Page (U Leicester), D. M. Palmer (LANL) and M. H. Siegel (PSU) report on behalf of the Swift Team: At 05:47:47 UT, the Swift Burst Alert Telescope (BAT) triggered on the combination of the rate increase due to the SAA and a marginal significance image fluctuation (trigger=658045). Swift slewed immediately to the image peak. The BAT light curve showed the usual rising background rate as expected on entry to the SAA. Because of the proximity to the SAA, the XRT centroided on a cosmic ray.