{
  "bibcode": "2012GCN.13239....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),\nE. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC),\nG. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-239 to T+963 sec from recent telemetry downlinks,\nwe report further analysis of the outburst from SGR1806-20 (trigger #519868)\n(Barthelmy, et al., GCN Circ. 13237).  The BAT ground-calculated position is\nRA, Dec = 272.163, -20.405 deg, which is \n   RA(J2000)  =  18h 08m 39.1s \n   Dec(J2000) = -20d 24' 19.0\" \nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 16%.\n \nThe mask-weighted light curve shows a single spike starting at ~T-0.002 sec,\npeaking at ~T+0.003 sec, and ending at ~T+0.15 sec with a tail out to ~T+0.4 sec.\nT90 (15-350 keV) is 0.77 +- 0.32 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-0.06 to T+0.96 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.77 +- 0.15.  The fluence in the 15-150 keV band is 5.1 +- 0.4 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.08 sec in the 15-150 keV band\nis 10.7 +- 0.9 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/519868/BA/",
  "circularId": 13239,
  "createdOn": 1334147761000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "SGR1806-20, Swift-BAT refined analysis (Trigger 519868)",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>"
}