{
  "bibcode": "2009GCN..9871....1E",
  "body": "P.A. Evans (U. Leicester)  reports on behalf of the Swift-XRT team.\n\nUsing 2.7 ks of XRT Photon Counting mode data and 2 UVOT images for GRB \n090902B, 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 = 264.93859, 27.32448 which is equivalent to:\n\nRA (J2000): 17h 39m 45.26s\nDec (J2000): +27d 19' 28.1\"\n\nwith an uncertainty of 2.1 arcsec (radius, 90% confidence).\n\nPosition enhancement is described by Goad et al. (2007, A&A, 476, 1401) \nand Evans et al. (2009, MNRAS, 397, 1177).\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 9871,
  "createdOn": 1251959114000,
  "email": "pae9@star.le.ac.uk",
  "subject": "GRB 090902B: Enhanced Swift-XRT position",
  "submitter": "Phil Evans at U of Leicester  <pae9@star.le.ac.uk>",
  "eventId": "GRB 090902B"
}