{
  "bibcode": "2008GCN..7266....1R",
  "body": "J. L. Racusin (PSU) reports on behalf of the Swift-XRT Team:\n\nWe have analysed the first 4 orbits of Swift-XRT data obtained for GRB\n080207 (Racusin et al. GCN Circ. 7264), totaling 64 s of Windowed Timing\n(WT) data and 5.7 ks of Photon Counting (PC) data.  The enhanced XRT\nposition is given in Beardmore et al. (GCN 7265).\n\nThe X-ray light-curve can be fit by a broken power-law with an initial\nbright short flat phase with a a break at 205 +/- 73 sec followed by a\npower-law with a decay slope of 1.5 +/- 0.1.\n\nThe WT data (133-197 seconds) can be modeled as an absorbed power-law with\nphoton index of 1.1 +/- 0.1 and a total absorbing column of NH = (85 +/-\n10)e20 cm^-2.  The PC data (4.7-17.1 ks) can be modeled as an absorbed\npower-law with photon index of 2.4 +/- 0.2 and a total absorbing column of\nNH = (75 +/- 17)e20 cm^-2.  Both fits are in excess of the Galactic value\nof 1.95e20 cm^-2. The 0.3-10 keV observed (unabsorbed) flux during this\ntime is 5.80e-9 (5.81e-9) erg cm^-2 s^-1 and 1.15e-11 (1.16e-11) erg cm^-2\ns^-1 for WT and PC, respectively.\n\nAssuming the source continues to decay with the same decay index of 1.5,\nwe predict an XRT count rate of 7.6e-3 counts/s at T+24 hours, which\ncorresponds to an 0.3-10.0 keV observed flux of 6.6e-13 ergs cm^-2 s^-1.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 7266,
  "createdOn": 1202450577000,
  "email": "racusin@astro.psu.edu",
  "subject": "GRB 080207: Swift-XRT Refined Analysis",
  "submitter": "Judith Racusin at PSU  <racusin@astro.psu.edu>",
  "eventId": "GRB 080207"
}