{
  "bibcode": "2011GCN.12464....1S",
  "body": "T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC),\nH. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\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-240 to T+963 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 111020A (trigger #505926)\n(Sakamoto, et al., GCN Circ. 12460).  The BAT ground-calculated position is\nRA, Dec = 287.029, -38.031 deg, which is \n   RA(J2000)  =  19h 08m 06.9s \n   Dec(J2000) = -38d 01' 50.3\" \nwith an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 74%.\n \nThe mask-weighted light curve shows a single spike starting at ~T+0.0, peaking\nat ~T+0.1 sec, and ending at ~T+1.0 sec.  There is a hint (at the 2.5-sigma level)\nof a soft tail out to ~T+10 sec.  T90 (15-350 keV) is 0.40 +- 0.09 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T-0.04 to T+0.39 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.37 +- 0.26.  The fluence in the 15-150 keV band is 6.5 +- 1.0 x 10^-8 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.32 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/505926/BA/",
  "circularId": 12464,
  "createdOn": 1319125772000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 111020A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 111020A"
}