TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3579 SUBJECT: GRB050712: XRT refined analysis DATE: 05/07/13 03:39:58 GMT FROM: Dirk Grupe at PSU/Swift-XRT D. Grupe, D. Burrows, D. Morris, A. Falcone, J. Nousek, P. Meszaros, M. Chester (PSU), N. Gehrels (GSFC), on behalf of the Swift-XRT team: Title: GRB050712: XRT refined analysis We analysed the XRT data of the first four orbits of GRB050712 (GCN 3573, Grupe et al., 2005). The refined position using xrtcentroid is: RA (2000): 05 10 47.31 Dec (2000): +64 54 49.76 The centroiding error is 6 arcsec. This is 62 arcseconds from the refined BAT position (GCN 3576, Markwardt et al., 2005) and 5.5 arcseconds from the tentative UVOT counterpart (GCN 3575, Rol et al., 2005) The WT mode data can be fitted by a single power law with an X-ray slope beta=1.20+/-0.08. The neutral absorption parameter is 1.8e21 1/cm2, which is slightly higher than the Galactic value (1.3e21 1/cm2; Dickey & Lockman 1990). The PC mode data agree with this result within the errors. The light curve shows a fading afterglow with a preliminary decay slope of alpha=0.85+/-0.08. The unabsorber 0.3-10.0 keV flux at 1 hour after the burst is estimated to 6.3e-12 ergs/s/cm2