{
  "bibcode": "2014GCN.16017....1P",
  "body": "C. Pagani, K.L. Page and P.A. Evans report on behalf of the Swift-XRT\nteam:\n\nWe have analysed 4.0 ks of XRT data for the INTEGRAL-detected burst:\nGRB 140320C,  from 19.5 ks to 37.3 ks after the  INTEGRAL trigger. The\ndata are entirely in Photon Counting (PC) mode.  An X-ray source is\ndetected within the INTEGRAL error circle. Using 1552 s of PC mode data\nand 1 UVOT images, we find an enhanced XRT position (using the XRT-UVOT\nalignment and matching UVOT field sources to the USNO-B1 catalogue):\nRA, Dec = 134.39421, +71.19839 which is equivalent to:\n\nRA (J2000): 08h 57m 34.61s\nDec(J2000): +71d 11' 54.2\"\n\nwith an uncertainty of 2.6 arcsec (radius, 90% confidence). This\nposition is 27 arcsec from the INTEGRAL position. \n\nThe light curve can be modelled with  a power-law decay with a decay\nindex of alpha=2.8 (+1.0, -1.7).\n\nA spectrum formed from the PC mode data can be fitted with an absorbed\npower-law with a photon spectral index of 1.3 (+0.9, -0.3) and an\nabsorption column consistent with the Galactic value of 3.6 x 10^20\ncm^-2 (Willingale et al. 2013). The  counts to observed (unabsorbed)\n0.3-10 keV flux conversion factor deduced from this spectrum  is 5 x\n10^-11 (5 x 10^-11) erg cm^-2 count^-1.\n\nIf the light curve continues to decay with a power-law decay index of\n2.8, the count rate at T+24 hours will be 2.4 x 10^-4 count s^-1\n\nThe results of the XRT-team automatic analysis are available at\nhttp://www.swift.ac.uk/xrt_products/00020371.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 16017,
  "createdOn": 1395398078000,
  "email": "cp232@star.le.ac.uk",
  "subject": "GRB 140320C: Swift-XRT observations",
  "submitter": "Claudio Pagani at U of Leicester  <cp232@star.le.ac.uk>",
  "eventId": "GRB 140320C"
}