{
  "bibcode": "2006GCN..5712....1V",
  "body": "L. Vetere, C. Pagani, D. N. Burrows (PSU) and P. Schady (MSSL-UCL) report on\nbehalf of the Swift XRT team:\n\nWe have analysed the first 3 orbits of XRT data from GRB 061007. This is one of\nthe brightest GRB afterglow ever observed by XRT.\nA 5.2ks photon counting mode image provides a refined XRT position:\n\nRA(J2000)  =  03 05 19.1\nDec(J2000) = -50 30 01.5\n\nwith an uncertainty of 5 arcsec (90% containment). This position is 3.8 arcsec\naway from the on-board XRT position and 4 arcsec away from UVOT position\n(Schady et al. GCN 5707).\n\nThe X-ray light curve shows a rapid decay with a slope of -1.6 +/-0.1. A\npower-law fit to the WT spectrum gives a photon index of  2.36 +/- 0.2 and a\ncolumn density of (2.2 +/- 0.2)e21 cm**-2. We note the galactic hydrogen column\ndensity in the direction of the burst is  2.13e20cm**-2. The 0.2-10.0 keV\nobserved mean flux during WT observation is 1.46e-07 ergs cm**-2 s**-1, which\ncorresponds to an unabsorbed flux of 2.98e-07 ergs cm**-2 s**-1.\n\nIf the burst continues decaying at the current rate we estimate an XRT\ncount rate of 0.0069 counts/s at T + 24hr, which corresponds to an\nobserved 0.2-10.keV flux of 5.7e-11 ergs cm**-2 s**-1.\n\nThis circular is an official product of the Swift XRT Team.",
  "circularId": 5712,
  "createdOn": 1160256099000,
  "email": "vetere@astro.psu.edu",
  "subject": "GRB 061007: Swift XRT refined analysis",
  "submitter": "Loredana Vetere at PSU  <vetere@astro.psu.edu>",
  "eventId": "GRB 061007"
}