{
  "bibcode": "2015GCN.18469....1M",
  "body": "C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC),  J. R. Cummings (GSFC/UMBC),\nP. D'Avanzo (INAF-OAB), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nA. Y. Lien (GSFC/UMBC), D. M. Palmer (LANL), T. Sakamoto (AGU),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 151023A (trigger #661253)\n(D'Avanzo, et al., GCN Circ. 18450).  The BAT ground-calculated position is\nRA, Dec = 271.012, -8.289 deg which is\n  RA(J2000)  =  18h 04m 02.9s\n  Dec(J2000) = -08d 17' 19.7\"\nwith an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 83%.\n\nThe mask-weighted light curve shows a single-pulse structure that starts at ~ T-1 s,\npeaks at ~T0, and ends at ~ T+10 s. T90 (15-350 keV) is 10.66 +- 4.41 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T-0.65 to T+12.16 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.24 +- 0.24.  The fluence in the 15-150 keV band is 2.6 +- 0.4 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.03 sec in the 15-150 keV band\nis 1.1 +- 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/661253/BA/",
  "circularId": 18469,
  "createdOn": 1445714283000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 151023A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 151023A"
}