{
  "bibcode": "2008GCN..8009....1P",
  "body": "K.L. Page (U. Leicester) reports on behalf of the Swift-XRT team:\n\nThe INTEGRAL/Super-AGILE-detected GRB 080723B has now been observed by the \nSwift-XRT for three orbits (a total of ~2.3 ks of Photon Counting mode \ndata). The source reported in GCN Circ. 8008 can now be seen to be fading \n(alpha = 1.27 +/- 0.23), so is confirmed as the X-ray afterglow.\n\nA spectrum formed from the combined data (~1.3 - 30 ks after the triggers) \ncan be fitted by a power-law of Gamma = 1.87 +/- 0.14, absorbed by the \nGalactic column in this direction, of 7.42x10^21 cm^-2. The average \nobserved (unabsorbed) flux over this time is 1.49 (2.57) x 10^-9 erg cm^-2 \ns^-1, which provides an observed counts to flux conversion of 5.9x10^-9 \nerg cm^-2 count^-1.\n\nIf the decay were to continue with alpha ~1.27, the count rate 24 hours \nafter the trigger woule be 0.04 count s^-1 (corresponding to an observed \nflux of 2.4x10^-10 erg cm^-2 s^-1).\n\nThe circular is an official product of the Swift-XRT team.",
  "circularId": 8009,
  "createdOn": 1216882874000,
  "email": "kpa@star.le.ac.uk",
  "subject": "GRB 080723B - Swift-XRT refined analysis",
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "eventId": "GRB 080723B"
}