{
  "bibcode": "2018GCN.23030....1O",
  "body": "J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore\n(U. Leicester), P. D'Avanzo (INAF-OAB), V. D'Elia (ASDC), A. D'Ai\n(INAF-IASFPA), D.N. Burrows (PSU), A. Tohuvavohu (PSU), S. J. LaPorte\n(PSU) and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT\nteam:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-detected burst GRB 180718A (Svinkin et al. GCN Circ. 22959),\ncollecting 1.5 ks of Photon Counting (PC) mode data between T0+113.7 ks\nand T0+115.2 ks. \n\nNo X-ray sources have been detected consistent with being within 296\narcsec of the Swift/BAT position. The 3-sigma upper limit in the field\nranges from ~0.005 to ~0.013 ct s^-1, corresponding to a 0.3-10 keV\nobserved flux of 2.1e-13 to 5.1e-13 erg cm^-2 s^-1 (assuming a typical\nGRB spectrum).\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/00020802.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 23030,
  "createdOn": 1532439433000,
  "email": "bxs60@psu.edu",
  "subject": "GRB 180718A: Swift-XRT observations",
  "submitter": "Boris Sbarufatti at PSU  <bxs60@psu.edu>",
  "eventId": "GRB 180718A"
}