{
  "bibcode": "2020GCN.28587....1P",
  "body": "K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), M.G.\nBernardini (INAF-OAB), E. Ambrosi  (INAF-IASFPA) , M. Capalbi\n(INAF-IASFPA), J.A. Kennea (PSU), A. Tohuvavohu (U. Toronto), B.\nSbarufatti (PSU) and P.A. Evans (U. Leicester) report on behalf of the\nSwift-XRT team:\n\nSwift-XRT has performed follow-up observations of the Fermi/GBM and\nSwift/BAT-GUANO detected burst GRB 201008A (DeLaunay et al. GCN Circ.\n28583), collecting 4.5 ks of Photon Counting (PC) mode data between\nT0+46.9 ks and T0+60.1 ks. \n\nTwo uncatalogued X-ray sources have been detected consistent with being\nwithin 296 arcsec of the BAT/GUANO position, however none of them is\nabove the RASS limit or shows definitive signs of fading. Therefore, at\nthe 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):  161.7543  =  10:47:1.02\n  Dec (J2000.0): +46.1475  =  +46:08:51.1\n  Error: 5.1 arcsec (radius, 90% conf.)\n  Count-rate: (1.79 [+1.09, -0.80])e-3 ct s^-1\t \n  Distance: 169 arcsec from BAT position.\n  NB, this position is consistent with SDSS J104701.20+460848.8,\n  a likely quasar in the SDSS Quasar Catalogue. If this association\n  and ID is accurate, this source is unlikely to be related to the GRB.\n\n\nSource 4:\n  RA (J2000.0):  161.8588  =  10:47:26.10\n  Dec (J2000.0): +46.1019  =  +46:06:06.9\n  Error: 4.8 arcsec (radius, 90% conf.)\n  Count-rate: (4.1 [+1.3, -1.1])e-3 ct s^-1   \n  Distance: 286 arcsec from BAT position.\n  Flux: (1.68 [+0.52, -0.44])e-10 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\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/00021034.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 28587,
  "createdOn": 1602233018000,
  "email": "pae9@leicester.ac.uk",
  "subject": "GRB 201008A: Swift-XRT observations",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "GRB 201008A"
}