{
  "bibcode": "2026GCN.43439....1S",
  "createdOn": 1768711623483,
  "submittedHow": "email",
  "eventId": "GRB 260117A",
  "subject": "GRB 260117A: Swift-XRT observations",
  "circularId": 43439,
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "body": "C. Salvaggio (INAF-OAB), M. Ferro (INAF-OAB), R. Brivio (INAF-OAB),\nD.N. Burrows (PSU), S. Lanava (PSU), S. Dichiara (PSU), J.P. Osborne\n(U. Leicester), K.L. Page (U. Leicester) and P.A. Evans (U. Leicester)\nreports on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSVOM/ECLAIRs-detected burst GRB 260117A, collecting  2.9 ks of Photon\nCounting (PC) mode data between T0+12.5 ks and T0+19.8 ks. \n\nTwo uncatalogued X-ray sources have been detected, however none of them\nis above the RASS limit or shows definitive signs of fading. Therefore,\nat the present time we cannot identify which, if any, is the afterglow.\nDetails of these sources are given below:\n\nSource 1:\n  RA (J2000.0):  188.1380  =  12h 32m 33.12s\n  Dec (J2000.0): +43.9131  =  +43d 54' 47.3\"\n  Error: 5.3 arcsec (radius, 90% conf.)\n  Count-rate: (8.6 +/- 2.1)e-3 ct s^-1\t \n  Distance: 152 arcsec from SVOM/ECLAIRs position.\n  Flux: (3.90 +/- 0.93)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 2:\n  RA (J2000.0):  188.3043  =  12h 33m 13.03s\n  Dec (J2000.0): +43.8449  =  +43d 50' 41.7\"\n  Error: 5.8 arcsec (radius, 90% conf.)\n  Count-rate: (4.0 [+1.7, -1.4])e-3 ct s^-1   \n  Distance: 343 arcsec from SVOM/ECLAIRs position.\n  Flux: (1.29 [+0.56, -0.44])e-10 erg cm^-2 s^-1 (observed, 0.3-10 keV)\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/00021898.\n\nThis circular is an official product of the Swift-XRT team.\n\n"
}