{
  "bibcode": "2009GCN.10287....1E",
  "body": "P.A. Evans and M.R. Goad (U. Leicester) report\non behalf of the Swift-XRT team:\n\nUsing 3.7 ks of XRT Photon Counting mode data and 7 UVOT\nimages, we find an astrometrically corrected X-ray position (using the\nXRT-UVOT alignment and matching UVOT field sources to the USNO-B1\ncatalogue): RA, Dec =\n55.79749, 23.24119 which is equivalent to:\n\nRA (J2000):  03 43 11.40\nDec (J2000): +23 14 28.3\n\nwith an uncertainty of 1.7 arcsec (radius, 90% confidence).\n\nThis position may be improved as more data are received.  The latest\nposition can be viewed at http://www.swift.ac.uk/xrt_positions. Position\nenhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans\net al. (2009, MNRAS, 397, 1177).\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 10287,
  "createdOn": 1261473445000,
  "email": "pae9@star.le.ac.uk",
  "subject": "GRB 091221: Enhanced Swift-XRT position",
  "submitter": "Phil Evans at U of Leicester  <pae9@star.le.ac.uk>",
  "eventId": "GRB 091221"
}