{
  "bibcode": "2009GCN..9711....1P",
  "body": "K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team:\n\nWe have analysed the first five orbits of data collected for GRB 090726, \ncomprising 9.4 ks between 3.6 and 28 ks after the trigger, all in Photon \nCounting mode. The enhanced XRT position for this burst was given by Evans \net al. in GCN Circ. 9710.\n\nThe X-ray light-curve can be modelled with a single power-law with a decay \nindex of alpha = 1.29 +/- 0.12.\n\nA spectrum formed from these PC data can be fitted with an absorbed \npower-law of Gamma = 2.50 +0.26/-0.24 and a total absorbing column of NH = \n(1.2 +/- 0.5) x 10^21 cm^-2, which is in excess of the Galactic value \n(3.83 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 spectrum \nis 3.1 x 10^-11 (5.1 x 10^-11) erg cm^-2 count^-1.\n\nIf the light-curve continues to decay with alpha ~ 1.29, the predicted \ncount rate at 24 hours is 3.4 x 10^-3 count s^-1, corresponding to an \nobserved (unabsorbed) flux of 1.1 x 10^-13 (1.7 x 10^-13) erg cm^-2 s^-1.\n\nThe results of the XRT-team automatic analysis are available at \nhttp://www.swift.ac.uk/xrt_products/00358422.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 9711,
  "createdOn": 1248701411000,
  "email": "kpa@star.le.ac.uk",
  "subject": "GRB 090726: Swift-XRT Team refined analysis",
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "eventId": "GRB 090726"
}