{
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "circularId": 35234,
  "createdOn": 1701352754858,
  "subject": "GRB 231129C: Swift-XRT observations",
  "bibcode": "2023GCN.35234....1G",
  "eventId": "GRB 231129C",
  "body": "J. D. Gropp (PSU), S. Dichiara (PSU), K.L. Page (U. Leicester), A.P.\nBeardmore (U. Leicester), M.G. Bernardini (INAF-OAB), E. Ambrosi \n(INAF-IASFPA) , M. Capalbi (INAF-IASFPA), J.A. Kennea (PSU) and P.A.\nEvans (U. Leicester) reports on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nFermi/GBM-detected burst GRB 231129C in a series of observations tiled\non the sky. The total exposure time is 1.5 ks, distributed over 4\ntiles; the maximum exposure at a single sky location was 633 s. The\ndata were collected between T0+19.3 ks and T0+35.4 ks, and are entirely\nin Photon Counting (PC) mode. \n\nOne uncatalogued X-ray source has been detected, 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):  11.1769  =  00:44:42.45\n  Dec (J2000.0): -81.9936  =  -81:59:37.0\n  Error: 9.5 arcsec (radius, 90% conf.)\n  Count-rate: 0.0208 [+0.0113, -0.0084] ct s^-1   \n  Distance: 1341 arcsec from Fermi/GBM position.\n  Flux: (8.6 [+4.7, -3.5])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nA catalogued source was also detected.\n\nThe results of the XRT-team automatic analysis of the tiled XRT\nobservations, including a position-specific upper limit calculator, are\navailable at https://www.swift.ac.uk/xrt_products/TILED_GRB00117.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "submittedHow": "email"
}