{
  "circularId": 41706,
  "subject": "GRB 250904A: Prompt enhanced Swift-XRT position",
  "createdOn": 1757008898019,
  "bibcode": "2025GCN.41706....1E",
  "eventId": "GRB 250904A",
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "body": "P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:\n\nUsing 343 s of promptly downlinked XRT event data for GRB 250904A, we\nfind an enhanced XRT position of the afterglow: RA, Dec: 84.38029,\n3.58466 which is equivalent to:\n   RA (J2000)  = 05 37 31.27\n   Dec (J2000) = +03 35 04.8\nwith an uncertainty of 2.2 arcseconds (radius, 90% confidence).\nAnalysis of the promptly available data is online at\nhttp://www.swift.ac.uk/sper/1347179.\n\nPosition enhancement is described by Goad et al. (2007, A&A, 476, 1401)\nand Evans et al. (2009, MNRAS, 397, 1177).\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "submittedHow": "email"
}