{
  "body": "R. Brivio (INAF-OAB), A. D'Ai (INAF-IASFPA), S. Dichiara (PSU), J.A.\nKennea (PSU), D.N. Burrows (PSU), K.L. Page (U. Leicester), A.P.\nBeardmore (U. Leicester), S. Campana (INAF-OAB) and P.A. Evans (U.\nLeicester) reports on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nFermi/GBM-detected burst GRB 260125A (Fermi GBM Team, GCN 43510),\ncollecting  3.1 ks of Photon Counting (PC) mode data between T0+64.9 ks\nand T0+86.3 ks. \n\nNo X-ray sources have been detected consistent with the GOTO\ncounterpart position (Gompertz et al., GCN 43514). The 3-sigma upper\nlimit in the field is 0.003 ct\ts^-1, corresponding to a 0.3-10 keV\nobserved flux of 1.0e-13 erg cm^-2 s^-1 (assuming a typical GRB\nspectrum).\n\nFive uncatalogued sources were detected too far from the GOTO position,\nand not showing significant signs of fading to be likely afterglow\ncandidates.\n\nThe results of the XRT-team automatic analysis of the XRT observations,\nincluding a position-specific upper limit calculator, are available at\nhttps://www.swift.ac.uk/ToO_GRBs/00021899.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "bibcode": "2026GCN.43527....1B",
  "createdOn": 1769528177821,
  "eventId": "GRB 260125A",
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "subject": "GRB 260125A: Swift-XRT observations",
  "circularId": 43527,
  "submittedHow": "email"
}