{
  "bibcode": "2010GCN.11233....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),\nN. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD),\nD. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU),\nJ. Tueller (GSFC), T. N. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-61 to T+242 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 100906A (trigger #433509)\n(Markwardt, et al., GCN Circ. 11227).  The BAT ground-calculated position is\nRA, Dec = 28.697, 55.634 deg, which is \n   RA(J2000)  =  01h 54m 47.4s \n   Dec(J2000) = +55d 38' 03.7\" \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 46%.\n \nThe mask-weighted light curve shows several bright peaks.  The first pair\nof overlapping peaks starts at ~T-0.2 sec, peaks at ~T+2 and ~T+10 sec,\nand almost returns to background at ~T+35 sec.  There is a small peak\nat ~T+50 sec. Then there are four overlapping peaks from ~T+100 to ~T+118 sec.\nT90 (15-350 keV) is 114.4 +- 1.6 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-0.2 to T+130.5 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.78 +- 0.03.  The fluence in the 15-150 keV band is 1.2 +- 0.0 x 10^-5 erg/cm2.\nThe 1-sec peak photon flux measured from T+10.48 sec in the 15-150 keV band\nis 10.1 +- 0.4 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/433509/BA/",
  "circularId": 11233,
  "createdOn": 1283790680000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 100906A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 100906A"
}