{
  "bibcode": "2018GCN.22625....1T",
  "body": "A. Tohuvavohu (PSU), S. J. LaPorte (PSU), A.P. Beardmore (U.\nLeicester), S.L. Gibson (U. Leicester), P. D'Avanzo (INAF-OAB), V.\nD'Elia (ASDC), A. D'Ai (INAF-IASFPA), J.A. Kennea (PSU), B. Sbarufatti\n(INAF-OAB/PSU), and P.A. Evans (U. Leicester) report on behalf of the\nSwift-XRT team:\n\nSwift-XRT has performed follow-up observations of the IPN-detected\nburst GRB 180409A in a series of observations tiled on the sky. The\ntotal exposure time is 3.5 ks, distributed over 4 tiles; the maximum\nexposure at a single sky location was 2.4 ks. The data were collected\nbetween T0+53.5 ks and T0+71.6 ks, and are entirely in Photon Counting\n(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 1:\n  RA (J2000.0):  175.8434  =  11:43:22.42\n  Dec (J2000.0): +36.2335  =  +36:14:00.6\n  Error: 3.6 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: 0.0258 +/- 0.0068 ct s^-1   \n  Distance: 268 arcsec from IPN position.\n  Flux: (8.3 +/- 2.2)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nThe results of the XRT-team automatic analysis of the tiled XRT\nobservations, including a position-specific upper limit calculator, are\navailable at http://www.swift.ac.uk/xrt_products/TILED_GRB00069.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 22625,
  "createdOn": 1523370914000,
  "email": "aaronb@swift.psu.edu",
  "subject": "GRB 180409A: Swift-XRT observations",
  "submitter": "Aaron Tohuvavohu at PSU/Swift  <aaronb@swift.psu.edu>",
  "eventId": "GRB 180409A"
}