{
  "bibcode": "2017GCN.22165....1O",
  "body": "J.P. Osborne (U. Leicester), A. D'Ai (INAF-IASFPA), A. Melandri\n(INAF-OAB), P. D'Avanzo (INAF-OAB), D.N. Burrows (PSU), A. Tohuvavohu\n(PSU), S. J. LaPorte (PSU), K.L. Page (U. Leicester), A.P. Beardmore\n(U. Leicester) and P.A. Evans (U. Leicester) report on behalf of the\nSwift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nFermi/LAT-detected burst GRB 171124A (Longo et al. GCN Circ. 22156),\ncollecting 4.6 ks of Photon Counting (PC) mode data between T0+21.8 ks\nand T0+33.1 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 1:\n  RA (J2000.0):  335.42198  =  22:21:41.28\n  Dec (J2000.0): +35.14890  =  +35:08:56.0\n  Error: 2.8 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: (7.5 +/- 1.5)e-3 ct s^-1\t \n  Distance: 385 arcsec from Fermi/LAT position.\n  Flux: (1.85 +/- 0.38)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 2:\n  RA (J2000.0):  335.47618  =  22:21:54.28\n  Dec (J2000.0): +35.33200  =  +35:19:55.2\n  Error: 2.3 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: 0.0243 +/- 0.0029 ct s^-1   \n  Distance: 423 arcsec from Fermi/LAT position.\n  Flux: (7.33 +/- 0.86)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 3:\n  RA (J2000.0):  335.3767  =  22:21:30.42\n  Dec (J2000.0): +35.1638  =  +35:09:49.7\n  Error: 4.6 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: (3.52 [+1.20, -0.99])e-3 ct s^-1\t \n  Distance: 467 arcsec from Fermi/LAT position.\n  Flux: (1.10 [+0.38, -0.31])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 4:\n  RA (J2000.0):  335.49592  =  22:21:59.02\n  Dec (J2000.0): +35.16340  =  +35:09:48.2\n  Error: 2.8 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: (5.6 +/- 1.3)e-3 ct s^-1\t \n  Distance: 215 arcsec from Fermi/LAT position.\n  Flux: (2.04 +/- 0.49)e-13 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\nhttp://www.swift.ac.uk/ToO_GRBs/00020784.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 22165,
  "createdOn": 1511544988000,
  "email": "pae9@leicester.ac.uk",
  "subject": "GRB 171124A: Swift-XRT observations",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "GRB 171124A"
}