{
  "bibcode": "2012GCN.14067....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), V. Mangano (INAF-IASFPA), D. M. Palmer (LANL),\nT. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU),\nJ. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-240 to T+962 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 121211A (trigger #541200)\n(Mongano, et al., GCN Circ. 14057).  The BAT ground-calculated position is\nRA, Dec = 195.575, 30.173 deg, which is \n   RA(J2000)  =  13h 02m 18.0s \n   Dec(J2000) = +30d 10' 24.4\" \nwith an uncertainty of 4.9 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 23%.\n \nThe mask-weighted light curve shows a peak starting at ~T-5 sec, peaking at\n~T+2 sec, and returning to baseline at ~T+5 sec. Then a second set of peaks\nstarts at ~T+20 with the main emission from T+105 to ~T+200 sec.\nT90 (15-350 keV) is 182 +- 39 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-0.48 to T+196.77 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.36 +- 0.26.  The fluence in the 15-150 keV band is 1.3 +- 0.2 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+1.07 sec in the 15-150 keV band\nis 1.0 +- 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/541200/BA/",
  "circularId": 14067,
  "createdOn": 1355319362000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 121211A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 121211A"
}