TITLE: GCN CIRCULAR NUMBER: 7038 SUBJECT: GRB 071101: Swift-XRT Team refined analysis DATE: 07/11/02 14:05:24 GMT FROM: Olivier Godet at U.of Leicester O. Godet, K.L. Page, A.P. Beardmore, J.P. Osborne (U. Leicester), S. McBreen (MPE) on behalf of the Swift-XRT team: We analysed 15.5ks of Photon Counting data for GRB 071101 (McBreen et al. GCN Circ. 7030). Using Swift-XRT PC data, Pagani (GCN Circ. 7034) reported a faint X-ray source in the BAT error circle. The X-ray light-curve for this source can be fitted by a power-law from T+85s to T+4.1e4s, with an initial decay index of 0.9 ± 0.3. So, this source is the X-ray afterglow of GRB 071101. The Photon Counting spectrum can modelled as an absorbed power-law, with Gamma = 2.9 +2.5/-1.7 and a total absorbing column of NH = (2.0 +2.8/-1.6)e22 cm-2. The Galactic value is 5.7e21 cm-2 in the direction of the burst. The 1-10 keV observed (unabsorbed) flux during this time is 1.4e-13(3.2e-13) erg cm-2 s-1. Assuming the source continues to decay with the same decay index of 0.9, we predict an XRT count rate of 6.4e-4 counts/s at T+24 hours, which corresponds to an observed 1-10keV flux of 6.8E-14 ergs cm-2 s-1. This circular is an official product of the Swift-XRT team.