{
  "bibcode": "2006GCN..5905....1P",
  "body": "D. Palmer (LANL), L. Barbier (GSFC), S. D. Barthelmy (GSFC),\nJ. K. Cannizzo (GSFC/UMBC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL),\nN. Gehrels (GSFC), D. Hullinger (BYU-Idaho), H. Krimm (GSFC/USRA),\nC. Markwardt (GSFC/UMD), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU),\nG. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC)\non behalf of the Swift-BAT team:\n \nUsing the data set from T-239 to T+478 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 061210 (trigger #243690)\n(Cannizzo, et al., GCN Circ. 5904).  The BAT ground-calculated position\nis RA, Dec = 144.521, 15.613 deg which is \n   RA(J2000)  = 09h 38m 05.1s \n   Dec(J2000) = 15d 36' 46.3\" \nwith an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 30%.\n \nThe mask-weighted lightcurve has a hard FRED-like spike lasting a total\nof ~192 msec followed by much weaker, softer emssion lasting out to ~T+90 sec.\nT90 (15-350 keV) is 85 +- 5 sec (estimated error including systematics).\nThe event-by-event data shows the FRED-like peak is resolved to 3 somewhat\noverlapping spikes within 60 msec.\n \nThe time-averaged spectrum from T+0.2 to T+89.6 is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.55 +- 0.28.  The fluence in the 15-150 keV band is 1.1 +- 0.2 x 10^-6\nerg/cm2.  The 1-sec peak photon flux measured from T-0.01 sec in the\n15-150 keV band is 5.3 +- 0.5 ph/cm2/sec.\n\nThe spectrum of the first spike alone (T+0.212 to T+0.760 sec) is also\nfit by a simple power law model.  The power law index of the initial\nspike is 0.79 +- 0.15.  The fluence in the 15-150 keV band is\n3.0 +- 0.3 x 10^-7 erg/cm2.\n\nAll the quoted errors are at the 90% confidence level.",
  "circularId": 5905,
  "createdOn": 1165768754000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 061210, Swift-BAT refined analysis of the SHB",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 061210"
}