{
  "bibcode": "2017GCN.21416....1K",
  "body": "H. A. Krimm (NSF/USRA), S. D. Barthelmy (GSFC),\nA. Cholden-Brown (PSU), J. R. Cummings (CPI),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(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 170804A (trigger #766194)\n(Cholden-Brown et al., GCN Circ. 21410).  The BAT ground-calculated position is\nRA, Dec = 6.404, -64.781 deg which is\n  RA(J2000)  =  00h 25m 37.0s\n  Dec(J2000) = -64d 46' 50.9\"\nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 75%.\n\nThe mask-weighted light curve shows several over-lapping pulses that\nstart at ~T0 and end at ~T+60 s. T90 (15-350 keV) is 43.4 +- 9.8 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T+1.98 to T+60.90 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.67 +- 0.13.  The fluence in the 15-150 keV band is 1.3 +- 0.1 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+25.10 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/766194/BA/",
  "circularId": 21416,
  "createdOn": 1501947914000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 170804A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 170804A"
}