{
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "subject": "GRB 231017A: Swift-XRT observations",
  "eventId": "GRB 231017A",
  "bibcode": "2023GCN.34829....1D",
  "body": "S. Dichiara (PSU), J.A. Kennea (PSU), J.P. Osborne (U. Leicester), K.L.\nPage (U. Leicester), A.P. Beardmore (U. Leicester), E. Ambrosi \n(INAF-IASFPA) , M. Capalbi (INAF-IASFPA), M. Perri (SSDC & INAF-OAR),\nA. Tohuvavohu (U. Toronto) and P.A. Evans (U. Leicester) reports on\nbehalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-GUANO-detected burst GRB 231017A (GCN Circ. 34824, DeLaunay\net al.), collecting 4.2 ks of Photon Counting (PC) mode data between\nT0+32.7 ks and T0+101.7 ks. \n\nOne uncatalogued X-ray source has been detected consistent with being\nwithin 493 arcsec of the Swift/BAT-GUANO position, it is below the RASS\nlimit and shows no definitive signs of fading. Therefore, at the\npresent time we cannot confirm this as the afterglow. Details of this\nsource are given below:\n\nSource 2:\n  RA (J2000.0):  86.1666  =  05:44:39.99\n  Dec (J2000.0): +56.7487  =  +56:44:55.3\n  Error: 8.4 arcsec (radius, 90% conf.)\n  Count-rate: (2.09 [+1.11, -0.84])e-3 ct s^-1\t \n  Distance: 301 arcsec from Swift/BAT-GUANO position.\n  Flux: (3.3 [+1.8, -1.3])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nTwo uncatalogued sources were also detected too far from the GRB\nposition to 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/00021623.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "createdOn": 1697644578664,
  "submittedHow": "email",
  "circularId": 34829
}