{
  "bibcode": "2010GCN.10320....1V",
  "body": "L. Vetere (PSU) reports on behalf of the Swift-XRT team:\n\n\nWe have analysed 774 s of XRT data for GRB 100111A (Vetere et al.\nGCN Circ. 10317), from 77 s to 852 s after the BAT trigger. The\ndata are entirely in Photon Counting (PC) mode. The light curve\ncan be modelled with a power-law decay with a decay index of\nalpha=0.58 +/- 0.16.\n\nA spectrum formed from the PC mode data can be fitted with an\nabsorbed power-law with a photon spectral index of 2.10 (+0.29,\n-0.26). The best-fitting absorption column is 1.7 (+0.8, -0.7) x\n10^21 cm^-2, in excess of the Galactic value of 4.1 x 10^20 cm^-2\n(Kalberla et al. 2005). The counts to observed (unabsorbed) 0.3-10\nkeV flux conversion factor deduced from this spectrum is 3.8 x\n10^-11 (5.7 x 10^-11) erg cm^-2 count^-1.\n\nIf the light curve continues to decay with a power-law decay index\nof 0.58, the count rate at T+24 hours will be 0.023 count s^-1,\ncorresponding to an observed (unabsorbed) 0.3-10 keV flux of 8.7 x\n10^-13 (1.3 x 10^-12) erg cm^-2 s^-1.\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/00382399.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 10320,
  "createdOn": 1263228832000,
  "email": "vetere@astro.psu.edu",
  "subject": "GRB100111A: Swift-XRT refined analysis",
  "submitter": "Loredana Vetere at PSU  <vetere@astro.psu.edu>",
  "eventId": "GRB 100111A"
}