{
  "bibcode": "2016GCN.19538....1M",
  "body": "L.M. McCauley (PSU), K.L. Page (U. Leicester), B. Mingo (U. Leicester),\nA.P. Beardmore (U. Leicester), V. D'Elia (ASDC), A. D'Ai (INAF-IASFPA),\nA. Maselli  (INAF-IASFPA), J.A. Kennea (PSU), B. Sbarufatti\n(INAF-OAB/PSU) and P.A. Evans (U. Leicester), S. R. Oates (U. Warwick)\nreport on behalf of the Swift-XRT and UVOT teams:\n\nSwift-XRT has performed follow-up observations of the\nSwift/BAT-detected burst GRB 160612A (Lien et al. GCN Circ. 19537),\ncollecting 985 s of Photon Counting (PC) mode data between T0+178.4 ks\nand T0+179.4 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 is 0.008 ct\ts^-1,\ncorresponding to a 0.3-10 keV observed flux of 3.1e-13 erg cm^-2 s^-1\n(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/00020665.\n\nThe UVOT did not detect an afterglow within the BAT error circle, down\nto a magnitude of > 20.87 with an exposure of 978s in the w2 filter.\n\nThis circular is an official product of the Swift-XRT and UVOT teams.",
  "circularId": 19538,
  "createdOn": 1465993495000,
  "email": "bm188@le.ac.uk",
  "subject": "GRB 160612A: Swift-XRT observations",
  "submitter": "Beatriz Mingo at U of Leicester,XRT  <bm188@le.ac.uk>",
  "eventId": "GRB 160612A"
}