GCN Circular 10531
J.M. Gelbord (PSU) and L. Vetere (PSU) report on behalf of the Swift-XRT team: We have analysed 22.5 ks of XRT data for SGR 1833-0832 (Gelbord et al. GCN Circ. 10526), from 80 s to 52.8 ks after the BAT trigger. The data are entirely in Photon Counting (PC) mode. The enhanced XRT position for this burst was given by Evans et al. (GCN Circ. 10530). The light curve is consistent with a SGR but not a GRB, as the present data exhibit little variability and do not decay. When the light curve is modelled with a power-law, the best-fitting alpha = 0.05 (+0.19,-0.17). The mean aperture-corrected count rate is 0.031 (+/-0.002) counts per second. A spectrum formed from these data can be fitted with an absorbed power-law with a photon spectral index of 3.21 (+0.69, -0.64). The best-fitting absorption column is 1.38 (+0.35, -0.30) x 10^23 cm^-2, in excess of the Galactic value of 1.7 x 10^22 cm^-2 (Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 1.1 x 10^-10 (4.7 x 10^-9) erg cm^-2 count^-1. The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/00416485. This circular is an official product of the Swift-XRT team.