{
  "bibcode": "2011GCN.12660....1B",
  "body": "D.N. Burrows (PSU), C. Pagani (U. Leicester), A.P. Beardmore (U.\nLeicester), P.A. Evans (U. Leicester), V. Mangano (INAF-IASFPA), A.\nMelandri (INAF-OAB), B. Sbarufatti (INAF-OAB/PSU), J.A. Kennea (PSU),\nM.C. Stroh (PSU) and M.H. Siegel report on behalf of the Swift-XRT\nteam:\n\nWe have analysed 6.8 ks of XRT data for GRB 111210A (Siegel  et al. GCN\nCirc. 12650), from 69 s to 30.5 ks after the  BAT trigger. The data are\nentirely in Photon Counting (PC) mode. The enhanced XRT position for\nthis burst was given by Goad et al. (GCN. Circ 12652).\n\nThe light curve can be modelled with  a power-law decay with a decay\nindex of alpha=3.7 (+/-0.4).\n\nA spectrum formed from the PC mode data can be fitted with an absorbed\npower-law with a photon spectral index of 1.6 (+0.6, -0.3). The\nbest-fitting absorption column is  consistent with the Galactic value\nof 1.9 x 10^20 cm^-2 (Kalberla et al. 2005). The counts to observed\n(unabsorbed) 0.3-10 keV flux conversion factor deduced from this\nspectrum  is 4.7 x 10^-11 (4.9 x 10^-11) erg cm^-2 count^-1. \n\nA summary of the PC-mode spectrum is thus:\nTotal column:\t     0 (+1.1, -0) x 10^21 cm^-2\nGalactic foreground: 1.9 x 10^20 cm^-2\nExcess significance: <1.6 sigma\nPhoton index:\t     1.6 (+0.6, -0.3)\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/00509419.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 12660,
  "createdOn": 1323571742000,
  "email": "pae9@star.le.ac.uk",
  "subject": "GRB 111210A: Swift-XRT refined Analysis",
  "submitter": "Phil Evans at U of Leicester  <pae9@star.le.ac.uk>",
  "eventId": "GRB 111210A"
}