{
  "bibcode": "2008GCN..8666....1P",
  "body": "K.L. Page, P.A. Evans (U. Leicester) and S.T. Holland (CRESST/USRA/GSFC) \nreport on behalf of the Swift-XRT team:\n\nSwift-XRT performed a Target of Opportunity observation of the possible \nBAT Slew Survey (BATSS) burst GRB 081211B (Copete et al., GCN Circ. 8661), \nstarting 81.6 ks after the slew in which it was detected, and found a \nsingle, uncatalogued X-ray source within the BATSS error circle.\n\nUsing 1878 s of XRT Photon Counting mode data and 4 UVOT images, we find \nan astrometrically corrected X-ray position (using the XRT-UVOT alignment \nand matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = \n168.2646, 53.8300 which is equivalent to:\n\nRA (J2000):  11 13 3.49\nDec (J2000): +53 49 48.1\n\nwith an uncertainty of 2.0 arcsec (radius, 90% confidence).\n\nDuring the initial observation (81.6-92 ks), the mean X-ray count rate was \n0.035 +/- 0.005 count s^-1. A second observation (126-133 ks) showed a \ncount rate of 0.018 +/- 0.006. The source, therefore, appears to have \nfaded, with a power-law index, alpha = 1.4 +0.8/-0.9. However, we cannot \nrule out a constant source at this time, so cannot categorically confirm \nthis is an X-ray afterglow.\n\nThis is an official product of the Swift-XRT team.",
  "circularId": 8666,
  "createdOn": 1229159987000,
  "email": "kpa@star.le.ac.uk",
  "subject": "Possible GRB 081211B - Swift-XRT analysis",
  "submitter": "Kim Page at U.of Leicester  <kpa@star.le.ac.uk>",
  "eventId": "GRB 081211B"
}