GCN Circular 15344
A. Amaral-Rogers, P.A. Evans & K.L. Page (U.Leicester) report on behalf of the Swift-XRT team: We have analysed 11 ks of XRT data for the Fermi/LAT-detected burst: GRB 131014A, from 44.1 ks to 173.4 ks after the Fermi/LAT trigger. The data are entirely in Photon Counting (PC) mode. An X-ray source is detected within the Fermi/LAT error circle. The enhanced XRT position was given in GCN Circ. 15339 (Evans & Amaral-Rogers). The light curve can be modelled with a power-law decay with a decay index of alpha=1.53 (+/-0.28). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 2.2 (+0.7, -0.6). The best-fitting absorption column is 6.8 (+4.0, -3.0) x 10^21 cm^-2, in excess of the Galactic value of 2.2 x 10^21 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.9 x 10^-11 (8.5 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 6.8 (+4.0, -3.0) x 10^21 cm^-2 Galactic foreground: 2.2 x 10^21 cm^-2 Excess significance: 2.5 sigma Photon index: 2.2 (+0.7, -0.6) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00020300. This circular is an official product of the Swift-XRT team.