{
  "submittedHow": "email",
  "circularId": 45593,
  "body": "S. Dichiara (PSU), M. Capalbi (INAF-OAR), M. Perri (SSDC & INAF-OAR),\nV. D'Elia (SSDC & INAF-OAR), J.A. Kennea (PSU), D.N. Burrows (PSU),\nK.L. Page (U. Leicester), A.P. Beardmore (U. Leicester) and P.A. Evans\n(U. Leicester) reports on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSVOM/ECLAIRs-detected burst GRB 260909A, collecting  2.9 ks of Photon\nCounting (PC) mode data between T0+137.7 ks and T0+264.7 ks. \n\nNo X-ray sources have been detected within the estimated 90% SVOM/MXT\nerror region (64 arcsec; Saccardi et al. GCN 45534) or at the position\nof the EP candidate (Mao et al. GCN 45543). The 3-sigma upper limit in\nthe field ranges from ~0.003 to ~0.005 ct s^-1, corresponding to a\n0.3-10 keV observed flux of 1.1e-13 to 1.8e-13 erg cm^-2 s^-1 (assuming\na typical GRB spectrum).\n\nFour uncatalogued sources were detected too far from the GRB position\nto be likely afterglow candidates.\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/00021911.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "createdOn": 1789557641815,
  "eventId": "GRB 260909A",
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "subject": "GRB 260909A: Swift-XRT observations"
}