{
  "bibcode": "2011GCN.11783....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),\nS. R. Oates (UCL-MSSL), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC),\nM. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-60 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 110312A (trigger #449074)\n(Oates, et al., GCN Circ. 11782).  The BAT ground-calculated position is\nRA, Dec = 157.500, -5.259 deg, which is \n   RA(J2000)  =  10h 30m 00.0s \n   Dec(J2000) = -05d 15' 32.6\" \nwith an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 26%.\n \nThe mask-weighted light curve shows a single start at ~T+25 sec, peaking\naround T+45 sec, and ending at ~T+65 sec.  T90 (15-350 keV) is 28.7 +- 7.6 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T+24.1 to T+64.9 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.32 +- 0.26.  The fluence in the 15-150 keV band is 8.2 +- 1.3 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T+44.08 sec in the 15-150 keV band\nis 1.2 +- 0.3 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/449074/BA/",
  "circularId": 11783,
  "createdOn": 1299969408000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 110312A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 110312A"
}