{
  "bibcode": "2015GCN.17684....1K",
  "body": "J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU), A. Amaral-Rogers (U.\nLeicester), J.P. Osborne (U. Leicester), A. Melandri (INAF-OAB), P.\nD'Avanzo (INAF-OAB), V. D'Elia (ASDC), D.N. Burrows (PSU) and P.A.\nEvans (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 150407A (Palmer et al. GCN Circ. 17682),\ncollecting 2.0 ks of Photon Counting (PC) mode data between T0+68.5 ks\nand T0+70.5 ks. \n\nNo X-ray sources have been detected inside or close to the Swift/BAT\nerror region. The 3-sigma upper limit in the field ranges from ~0.004\nto ~0.009 ct s^-1, corresponding to a 0.3-10 keV observed flux of\n1.4e-13 to 3.8e-13 erg cm^-2 s^-1 (assuming a typical GRB 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/00020487.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 17684,
  "createdOn": 1428478794000,
  "email": "pae9@leicester.ac.uk",
  "subject": "GRB 150407A: Swift-XRT observations",
  "submitter": "Phil Evans at U of Leicester  <pae9@leicester.ac.uk>",
  "eventId": "GRB 150407A"
}