{
  "bibcode": "2004GCN..2520....1T",
  "body": "J. A. Tedds (University of Leicester) and D. Watson (University of\nCopenhagen) report on behalf of a larger collaboration:\n\n\nThe XMM-Newton EPIC coordinates were refined by matching the X-ray sources\nin the field to the USNO-A2 catalogue.  The cross-correlation is extremely\ngood and yields a final source position (J2000) for the X-ray afterglow of\n\nRA: 11 52 12.43, Dec: -46 47 15.9\n\nThe 1 sigma error radius is 0.7\" (including the residual 0.5\" systematic\nerror from the correlation that is observed in the 1XMM catalogue).\n\nThis is not precisely consistent with the position of the fading optical\nsource reported by Masetti et al. (GCN 2515).  However we note that the\nposition of the star listed as #4 in the image provided by Masetti et al.,\nwhich corresponds to the USNO-B1 source 0432-0297902 and the relative\nposition of another star in the field (USNO-B1 0432-0297908), both imply a\nshift of ~1\" in their coordinates in R.A.  Correcting for this shift we find\nthe optical transient position consistent with the XMM-Newton position given\nabove.  This position is not coincident with that of the radio source\nreported by Wieringa & Frail (GCN 2516).",
  "circularId": 2520,
  "createdOn": 1074705844000,
  "email": "darach@astro.ku.dk",
  "subject": "GRB040106: refined X-ray transient position",
  "submitter": "Darach Watson at U.of Copenhagen  <darach@astro.ku.dk>",
  "eventId": "GRB 040106"
}