{
  "bibcode": "2016GCN.19961....1L",
  "body": "A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC),\nN. Gehrels (GSFC), S. L. Gibson (U Leicester), H. A. Krimm (GSFC/USRA),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(i.e. the Swift-BAT team):\n  \nUsing the data set from T-61 to T+242 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 160927A (trigger #713782)\n(Gibson, et al., GCN Circ. 19952).  The BAT ground-calculated position is\nRA, Dec = 256.268, 17.334 deg which is\n    RA(J2000)  =  17h 05m 04.2s\n    Dec(J2000) = +17d 20' 01.8\"\nwith an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 50%.\n  \nThe mask-weighted light curve in 16 msec binning shows at least two\npeaks.  The first peak starts at T-0.2 sec, peaks at T+0.2 sec and\nends at T+0.3 sec.  The second peak starts at T+0.3 sec, peaks at\nT+0.4 sec and ends at T+0.5 sec.  T90 (15-350 keV) is 0.48 +- 0.10 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T+0 to T+0.54 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.12 +- 0.26.  The fluence in the 15-150 keV band is 1.4 +- 0.2 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.23 sec in the 15-150 keV band\nis 1.9 +- 0.3 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/713782/BA/",
  "circularId": 19961,
  "createdOn": 1475046806000,
  "email": "tsakamoto@phys.aoyama.ac.jp",
  "subject": "GRB 160927A: Swift-BAT refined analysis",
  "submitter": "Takanori Sakamoto at AGU  <tsakamoto@phys.aoyama.ac.jp>",
  "eventId": "GRB 160927A"
}