{
  "bibcode": "2015GCN.18129....1K",
  "body": "H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC),\nJ. R. Cummings (GSFC/UMBC), P. A. Evans (U Leicester),\nN. Gehrels (GSFC), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU),\nT. 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 150811A (trigger #651882)\n(Evans, et al., GCN Circ. 18119).  The BAT ground-calculated position is\nRA, Dec = 291.347, -15.434 deg which is\n  RA(J2000)  =  19h 25m 23.3s\n  Dec(J2000) = -15d 26' 00.8\"\nwith an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 67%.\n\nThe mask-weighted light curve shows a single FRED-like pulse that starts\nat ~T+1 s, peaks at ~T+6 s, and ends at ~T+40 s. T90 (15-350 keV)\nis 34.00 +- 6.25 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T+1.51 to T+40.36 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.13 +- 0.27.  The fluence in the 15-150 keV band is 4.9 +- 0.8 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T+6.59 sec in the 15-150 keV band\nis 0.5 +- 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/651882/BA/",
  "circularId": 18129,
  "createdOn": 1439330947000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 150811A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 150811A"
}