{
  "bibcode": "2008GCN..8756....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 1640 s of XRT Photon Counting mode data and 4 UVOT\nimages for GRB 081230, 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 = 37.3314, -25.1477 which is equivalent\nto:\n\nRA (J2000): 02h 29m 19.53s\nDec (J2000): -25d 08' 51.8\"\n\nwith an uncertainty of 1.8 arcsec (radius, 90% confidence).\n\nThis position may be improved as more data are received. The latest position\ncan be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is\ndescribed by Goad et al. (2007, A&A, 476, 1401\nhttp://www.swift.ac.uk/xrt_positions/Goad.pdf), the current algorithm is an\nextension of this method.\n\nThis circular was automatically generated, and is an official product of the\nSwift-XRT team.",
  "circularId": 8756,
  "createdOn": 1230685884000,
  "email": "pae9@star.le.ac.uk",
  "subject": "GRB 081230: Enhanced Swift-XRT position",
  "submitter": "Phil Evans at U of Leicester  <pae9@star.le.ac.uk>",
  "eventId": "GRB 081230"
}