{
  "bibcode": "2014GCN.16845....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),\nN. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), R. L. C. Starling (U Leicester)\nJ. Tueller (GSFC), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 140927A (trigger #613775)\n(Starling, et al., GCN Circ. 16842).  The BAT ground-calculated position is\nRA, Dec = 291.802, -65.400 deg which is\n  RA(J2000)  =  19h 27m 12.5s\n  Dec(J2000) = -65d 23' 58.4\"\nwith an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 54%.\n\nThe mask-weighted light curve shows a multi-peaked structure starts at ~ T0 and\nends at ~ T+9 s. The structure has roughly two main peaks, at ~ T+3.8 s and ~ T+7.7 s,\nrespectively. T90 (15-350 keV) is 6.26 +- 1.43 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T+0.43 to T+8.70 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.82 +- 0.30.  The fluence in the 15-150 keV band is 2.7 +- 0.5 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T+7.70 sec in the 15-150 keV band\nis 0.9 +- 0.2 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/613775/BA/",
  "circularId": 16845,
  "createdOn": 1411854584000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 140927A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 140927A"
}