{
  "eventId": "GRB 250628A",
  "createdOn": 1751086091662,
  "body": "P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester) \nreport on behalf of the Swift-XRT team.\n\nUsing 1647 s of XRT Photon Counting mode data and 4 UVOT\nimages for GRB 250628A, 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 = 38.55311, -38.07894 which is equivalent\nto:\n\nRA (J2000): 02h 34m 12.75s\nDec (J2000): -38d 04' 44.2\"\n\nwith an uncertainty of 2.4 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",
  "bibcode": "2025GCN.40854....1E",
  "submittedHow": "email",
  "subject": "GRB 250628A: Enhanced Swift-XRT position",
  "circularId": 40854,
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>"
}