{
  "bibcode": "2012GCN.13042....1O",
  "body": "J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) \nreport on behalf of the Swift-XRT team.\n\nUsing 4834 s of XRT Photon Counting mode data and 10 UVOT\nimages for GRB 120311B, we find an astrometrically corrected X-ray\nposition (using the XRT-UVOT alignment and matching UVOT field sources\nto the USNO-B1 catalogue): RA, Dec = 258.56208, -13.05144 which is equivalent\nto:\n\nRA (J2000): 17h 14m 14.90s\nDec (J2000): -13d 03' 05.2\"\n\nwith an uncertainty of 1.6 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 was automatically generated, and is an official product of the\nSwift-XRT team.",
  "circularId": 13042,
  "createdOn": 1331502848000,
  "email": "pae9@star.le.ac.uk",
  "subject": "GRB 120311B: Enhanced Swift-XRT position",
  "submitter": "Phil Evans at U of Leicester  <pae9@star.le.ac.uk>",
  "eventId": "GRB 120311B"
}