{
  "bibcode": "2007GCN..7139....1P",
  "body": "D. Palmer (LANL), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC),\nE. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),\nC. Markwardt (GSFC/UMD), C. Pagani (PSU), T. Sakamoto (GSFC/UMBC),\nG. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC),\nT. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-240 to T+800 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 071129 (trigger #297628)\n(Pagani, et al., GCN Circ. 7138).  The BAT ground-calculated position is\nRA, Dec = 220.039, -26.667 deg, which is \n   RA(J2000)  =  14h 40m 09.3s \n   Dec(J2000) = -26d 39' 60\" \nwith an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 55%.\n \nThe mask-weighted light curve shows three long, low, smooth peaks.  The first\nstarts at ~T-10 sec, peaks at ~T+5 sec, and then roughly exponentially\ndecays t a minimum around T+100 sec.  The second peak is more symmetric\nrising to a peak at ~T+180 sec and decaying back to baseline\naround T+300 sec.  The third weaker peak reaches a max around T+400 sec\nand is over by around T+450 sec.  T90 (15-350 keV) is 420 +- 100 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T-5.6 to T+522.3 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.94 +- 0.16.  The fluence in the 15-150 keV band is 3.5 +- 0.3 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+5.83 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 \nThis burst satisfies Sakamoto/Ukwatta Swift-BAT possible high-z criteria:\n1) Power law photon index = 1.94  (PL photon index < 2)\n2) 1-s peak photon flux = 0.9     (1-s peak photon flux < 1.0 ph/cm2/s)\n3) Light curve variance = 1.5e-6  (Variance < 0.0001)\n4) T90/(Peak photon flux) = 480   (T90/(Peak photon flux) > 200)\nBased on a limited sample of bursts, these criteria yield\nan 85% chance it has a redshift greater than 3.5.",
  "circularId": 7139,
  "createdOn": 1196341669000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 071129, Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 071129"
}