{
  "bibcode": "2022GCN.32847....1O",
  "body": "J.P. Osborne (U. Leicester), E. Ambrosi  (INAF-IASFPA) , M. Capalbi\n(INAF-IASFPA), M. Perri (SSDC & INAF-OAR), S. Dichiara (PSU), J.A.\nKennea (PSU), A. Tohuvavohu (U. Toronto), K.L. Page (U. Leicester),\nA.P. Beardmore (U. Leicester) and P.A. Evans (U. Leicester) report on\nbehalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-GUANO-detected burst GRB 221022A (Aaron Tohuvavohu et al. GCN\nCirc. 32824), collecting 3.8 ks of Photon Counting (PC) mode data\nbetween T0+170.9 ks and T0+184.2 ks. \n\nSix uncatalogued X-ray sources have been detected, however none of them\nis above the RASS limit or shows definitive signs of fading. None of\nthe six is inside the GUANO error region. Therefore, at the present\ntime we cannot identify which, if any, is the afterglow. \nDetails of these sources are given below:\n\nSource 1:\n  RA (J2000.0):  118.4349  =  07:53:44.38\n  Dec (J2000.0): -5.2165  =  -05:12:59.3\n  Error: 7.7 arcsec (radius, 90% conf.)\n  Count-rate: (3.1 [+1.5, -1.2])e-3 ct s^-1   \n  Distance: 489 arcsec from Swift/BAT-GUANO position.\n\nSource 2:\n  RA (J2000.0):  118.3560  =  07:53:25.45\n  Dec (J2000.0): -5.2797  =  -05:16:47.0\n  Error: 5.3 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: (4.3 [+1.7, -1.4])e-3 ct s^-1   \n  Distance: 588 arcsec from Swift/BAT-GUANO position.\n  Flux: (1.12 [+0.45, -0.36])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\n\nSource 3:\n  RA (J2000.0):  118.2368  =  07:52:56.83\n  Dec (J2000.0): -5.2703  =  -05:16:13.1\n  Error: 6.1 arcsec (radius, 90% conf.)\n  Count-rate: (4.2 [+1.8, -1.4])e-3 ct s^-1   \n  Distance: 668 arcsec from Swift/BAT-GUANO position.\n  Flux: (2.14 [+0.91, -0.72])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\n\nSource 4:\n  RA (J2000.0):  118.4804  =  07:53:55.29\n  Dec (J2000.0): -5.1253  =  -05:07:31.0\n  Error: 6.9 arcsec (radius, 90% conf.)\n  Count-rate: (1.65 [+1.13, -0.80])e-3 ct s^-1\t \n  Distance: 497 arcsec from Swift/BAT-GUANO position.\n\nSource 5:\n  RA (J2000.0):  118.1854  =  07:52:44.49\n  Dec (J2000.0): -5.2601  =  -05:15:36.4\n  Error: 4.1 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: (5.9 [+2.1, -1.7])e-3 ct s^-1   \n  Distance: 761 arcsec from Swift/BAT-GUANO position.\n  Flux: (2.22 [+0.79, -0.64])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\n\nSource 6:\n  RA (J2000.0):  118.3078  =  07:53:13.87\n  Dec (J2000.0): -5.2740  =  -05:16:26.4\n  Error: 6.6 arcsec (radius, 90% conf.)\n  Count-rate: (5.0 [+2.4, -1.8])e-3 ct s^-1   \n  Distance: 578 arcsec from Swift/BAT-GUANO position.\n  Flux: (1.01 [+0.47, -0.37])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\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/00021530.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 32847,
  "createdOn": 1666709114000,
  "email": "pae9@leicester.ac.uk",
  "subject": "GRB 221022A: Swift-XRT observations",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "GRB 221022A"
}