TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3155 SUBJECT: GRB 050331: Swift XRT Position DATE: 05/03/31 18:23:59 GMT FROM: David Burrows at PSU/Swift L. Angelini (GSFC), J. L. Racusin, S. Hunsberger, D. N. Burrows, J. E. Hill, J. A. Kennea, D. C. Morris, D. Grupe, J. A. Nousek (PSU), J. P. Osborne, K. L. Page, M. R. Goad, A. P. Beardmore, O. Godet, A. F. Abbey, A. A. Wells (U. Leicester), S. Campana, A. Moretti, C. Pagani, P. Romano, G. Tagliaferri, G. Chincarini (INAF-OAB), G. Cusumano, V. La Parola, V. Mangano, T. Mineo (INAF-IASF/Palermo), P. Giommi, M. Capalbi, M. Perri, F. Tamburelli (ASDC), F. Marshall, N. White, N. Gehrels (GSFC), P. Roming, P. Meszaros (PSU), P. Schady (MSSL), report on behalf of the Swift XRT team: The Swift spacecraft executed a prompt slew to GRB050331 (discovered by the Swift BAT). The XRT found a bright source located at the following position: RA(J2000) = 09:22:57, Dec(J2000) = -41:26:18 We estimate an uncertainty of about 6 arcseconds. This source is located 1.5 arcminutes from the BAT position.