TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2951 SUBJECT: GRB050117: Swift XRT Position DATE: 05/01/17 13:42:00 GMT FROM: David Burrows at PSU/Swift D. N. Burrows, J. E. Hill, G. Chincarini, J. Nousek, N. Gehrels, and P. Schady report on behalf of the Swift XRT team: The Swift XRT reported a prompt position for GRB050117. The burst was discovered by the BAT and the Swift spacecraft performed a prompt slew. The XRT found a bright source in the field and imaged it at IMG_START_DATE: 13387 TJD; 17 DOY; 05/01/17 IMG_START_TIME: 46548.64 SOD {12:55:48.64} UT The XRT position is GRB_RA: 358.4644d {+23h 53m 51s} (J2000), 358.5274d {+23h 54m 07s} (current), 357.8439d {+23h 51m 23s} (1950) GRB_DEC: +65.9418d {+65d 56' 30"} (J2000), +65.9699d {+65d 58' 12"} (current), +65.6635d {+65d 39' 49"} (1950) The XRT positions are not yet fully calibrated, and we estimate an uncertainty of 30 arcseconds in these coordinates. The XRT prompt image confirms that a point source is located at this position. A check of SIMBAD shows no bright X-ray sources in this location. Further information, including an XRT lightcurve and spectrum, will be available in a few hours.