TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3630 SUBJECT: GRB 050716: Refined XRT analysis. DATE: 05/07/16 19:30:32 GMT FROM: Cheryl Pauline Hurkett at Leicester U C. Hurkett, E. Rol, K. Page (U. Leicester), D. Burrows (PSU), J. Norris (GSFC), K. Hurley (Berkeley) and N. Gehrels (GSFC) report for the Swift XRT team: We have analysed the XRT data for GRB 050716 (GCN 3623, Rol et al) taken 104 seconds after the trigger. PSF fitting of the candidate afterglow in the photon counting (PC) mode observations yields a refined position of (J2000) RA 22:34:20.5 Dec +38:40:57.1 with an uncertainty of 6 arcseconds (90% containment). This position is less than 1 arcsecond from the position reported in GCN 3624 (Kennea et al). XRT observations began in Windowed Timing (WT) mode 104 seconds after the trigger and show a decline with a power-law decay index of 1.68 +/- 0.04 with flares at approximately 177 and 386 seconds. The decay index appears to stay the same at least until 6000 seconds after the trigger. The spectrum between 104 and 517 seconds after the trigger (WT data) has an average photon index of 1.32 (+/-0.04), with the absorption fixed at its Galactic value of 1.1e21 cm^-2. There is no evidence at the present time for excess absorption. The mean unabsorbed flux in WT mode at 230s (logarithmic mean time) is 7.02 (+0.27/-0.24) x 1e-10 erg/cm^2/s in the 0.5-10.0 keV energy range