{
  "bibcode": "2024GCN.38491....1G",
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "eventId": "GRB 241209D",
  "subject": "GRB 241209D: Enhanced Swift-XRT position",
  "createdOn": 1733753503896,
  "circularId": 38491,
  "submittedHow": "email",
  "body": "M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) \nreport on behalf of the Swift-XRT team.\n\nUsing 1140 s of XRT Photon Counting mode data and 4 UVOT\nimages for GRB 241209D, 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 = 190.11190, -2.89162 which is equivalent\nto:\n\nRA (J2000): 12h 40m 26.86s\nDec (J2000): -02d 53' 29.8\"\n\nwith an uncertainty of 2.8 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.\n"
}