{
  "bibcode": "2021GCN.31013....1P",
  "body": "M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), A. D'Ai\n(INAF-IASFPA), A. Tohuvavohu (U. Toronto), B. Sbarufatti (PSU), D.N.\nBurrows (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester)\nand P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-detected burst GRB 211024A (Aaron Tohuvavohu et al. GCN Circ.\n31006), collecting 5.1 ks of Photon Counting (PC) mode data between\nT0+221.8 ks and T0+234.5 ks. \n\nFour uncatalogued X-ray sources have been detected, however none of\nthem is above the RASS limit or shows definitive signs of fading.\nTherefore, at the present time we cannot identify which, if any, is the\nafterglow. Details of these sources are given below:\n\nSource 3:\n  RA (J2000.0):  27.9803  =  01:51:55.28\n  Dec (J2000.0): -6.9611  =  -06:57:39.9\n  Error: 9.0 arcsec (radius, 90% conf.)\n  Count-rate: (1.24 [+0.76, -0.56])e-3 ct s^-1\t \n  Distance: 261 arcsec from Swift/BAT position.\n  Flux: (4.0 [+2.4, -1.8])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 4:\n  RA (J2000.0):  28.1958  =  01:52:47.00\n  Dec (J2000.0): -7.0082  =  -07:00:29.4\n  Error: 3.3 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: 0.0146 [+0.0032, -0.0029] ct s^-1   \n  Distance: 527 arcsec from Swift/BAT position.\n  Flux: (3.49 [+0.76, -0.70])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 5:\n  RA (J2000.0):  27.8881  =  01:51:33.14\n  Dec (J2000.0): -6.9512  =  -06:57:04.2\n  Error: 6.8 arcsec (radius, 90% conf.)\n  Count-rate: (1.21 [+0.83, -0.59])e-3 ct s^-1\t \n  Distance: 592 arcsec from Swift/BAT position.\n\nSource 6:\n  RA (J2000.0):  28.0277  =  01:52:6.65\n  Dec (J2000.0): -7.0969  =  -07:05:48.8\n  Error: 7.5 arcsec (radius, 90% conf.)\n  Count-rate: (1.60 [+0.87, -0.66])e-3 ct s^-1\t \n  Distance: 454 arcsec from Swift/BAT position.\n\nA catalogued source was also detected.\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/00021464.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 31013,
  "createdOn": 1635316412000,
  "email": "pae9@leicester.ac.uk",
  "subject": "GRB 211024A: Swift-XRT observations",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "GRB 211024A"
}