{
  "bibcode": "2025GCN.39940....1P",
  "circularId": 39940,
  "body": "K.L. Page and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT\nteam:\n\nBecause of the location of Swift with respect to the South Atlantic\nAnomaly at the time of the burst, XRT began collecting Photon Counting\nmode data for GRB 250330A (GCN Circ. 39938) around 4 ks after the trigger.\nUsing promptly downlinked data we find an uncatalogued X-ray source\nlocated at RA, Dec = 252.9515, -86.87972 which is equivalent to\n\nRA (J2000): 16h 51m 48.36s\nDec (J2000): -86d 52' 47.0\"\n\nwith an uncertainty of 3.9 arcsec (radius, 90% confidence). This is 47\narcseconds from the BAT position, inside the BAT error circle.\n\nThis circular is an official product of the Swift-XRT team.\n",
  "createdOn": 1743325227843,
  "submitter": "K.L. Page at U Leicester <klp5@leicester.ac.uk>",
  "eventId": "GRB 250330A",
  "subject": "GRB 250330A: Prompt Swift-XRT position",
  "submittedHow": "email"
}