{
  "bibcode": "2010GCN.10382....1E",
  "body": "P.A. Evans and H. A. Krimm (CRESST/GSFC/USRA) report on behalf of the\nSwift-XRT team:\n\nWe have analysed 1.3 ks of XRT data for GRB 100206A (Krimm et al. GCN\nCirc. 10376), from 82 s to 1.3 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 10378).\n\nThe light curve can be modelled with a power-law decay with a decay\nindex of alpha=1.9 (+0.9/-0.7).\n\nA spectrum formed from the PC mode data can be fitted with an absorbed\npower-law with a photon spectral index of 2.0 (+1.2, -0.9). The\nbest-fitting absorption column is 3.5 (+5.3, -0.0) x 10^21 cm^-2, in\nexcess of the Galactic value of 1.3 x 10^21 cm^-2 (Kalberla et al.\n2005). The counts to observed (unabsorbed) 0.3-10 keV flux conversion\nfactor deduced from this spectrum is 4.6 x 10^-11 (7.4 x 10^-11) erg\ncm^-2 count^-1.\n\nIf the light curve continues to decay with a power-law decay index of\n1.9, the count rate at T+24 hours will be 1.9 x 10^-7 count s^-1,\ncorresponding to an observed (unabsorbed) 0.3-10 keV flux of 2.9 x\n10^-17 (4.7 x 10^-17) erg cm^-2 s^-1.\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/00411412.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 10382,
  "createdOn": 1265483173000,
  "email": "pae9@star.le.ac.uk",
  "subject": "GRB 100206A: Swift-XRT refined analysis",
  "submitter": "Phil Evans at U of Leicester  <pae9@star.le.ac.uk>",
  "eventId": "GRB 100206A"
}