TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3113 SUBJECT: GRB050318: Swift XRT position DATE: 05/03/19 00:19:21 GMT FROM: David Burrows at PSU/Swift J. A. Nousek, D. C. Morris, D. N. Burrows, D. Grupe, M. Chester, P. Meszaros (PSU), V. La Parola, V. Mangano (INAF-IASF/Palermo), S. Campana, G. Tagliaferri (INAF-OAB), M. Capalbi (ASDC), O. Godet, M. R. Goad (U. Leicester), L. Cominsky (Sonoma State U.), J. Greiner (MPE), H. Krimm, M. Still, and N. Gehrels (GSFC), report on behalf of the Swift XRT team: The Swift BAT instrument detected GRB 050318 at 15:44:37 UT on 18 March 2005 (Krimm et al 2005, GCN 3111). The BAT position was within the Swift Earth horizon constraint. The observatory executed an automated slew to the BAT position and the XRT began taking data in Auto State at 16:39:14 UT. Swift did not have contact with the ground station until about 22:29 UT. On receiving the data at Penn State, a preliminary analysis was performed by the XRT team. We find a bright uncataloged, rapidly fading X-ray source located at: RA(J2000) = 03:18:50.8, Dec(J2000) = -46:23:45.1. We estimate an uncertainty of about 6 arcseconds. This source is 87 arcseconds from the BAT position reported in GCN 3111.