TITLE: GCN CIRCULAR NUMBER: 7072 SUBJECT: GRB 071112B: Swift-XRT preliminary analysis DATE: 07/11/13 00:45:21 GMT FROM: Matteo Perri at ISAC/ASDC M. Perri, G. Stratta (ASDC), D.N. Burrows (PSU) report on behalf of the Swift-XRT team: The Swift-XRT began observing the field of the short hard GRB 071112B (trigger=296503, Perri et al., GCN Circ. 7058) at 19:25:35 UT, about 62 minutes after the BAT trigger. In the first 2.1 ks of Photon Counting mode data, no X-ray source is detected within the refined BAT error circle (Fenimore et al., GCN Circ. 7071) We estimate a 3-sigma upper limit on the count rate of ~5e-3 cts/s. Assuming a power-law spectrum with photon index Gamma=2 and a Galactic column density of 7.9e20 cm-2, this corresponds to an upper limit on the observed flux of ~2e-13 ergs/cm2/s (0.3-10 keV) This is an official product of the Swift XRT Team.