{
  "bibcode": "2006GCN..4864....1K",
  "body": "H. Krimm (GSFC/USRA), L. Barbier (GSFC), S. Barthelmy (GSFC),\nJ. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC),\nD. Grupe (PSU), D. Hullinger (BYU-Idaho), C. Markwardt (GSFC/UMD), \nD. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC),\nG. Sato (ISAS), J. Tueller (GSFC)\non behalf of the Swift-BAT team:\n\nUsing the data set from T-300 to T+302 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 060312 (trigger #201391)\n(Grupe, et al., GCN 4859).  The BAT ground-calculated position is RA,Dec =\n45.777,+12.825 deg {3h 3m 6.5s,+12d 49' 29.6\"} (J2000) +- 0.9 arcmin,\n(radius, sys+stat, 90% containment).  The partial coding was 100%.\n \nThe mask-weighted lightcurve shows two main peaks at T-27 and T+7 sec.\nThe first peak starts at T-35 sec and the second ends at ~T+30 sec.\nT90 (15-350 keV) is 43 +- 3 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-29.4 to T+22.0 is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.35 +- 0.34, \nand Epeak of 62.8 +- 21.5 keV (chi squared 46.33 for 56 d.o.f.).  \nFor this model the total fluence in the 15-150 keV band is\n1.8 +- 0.1 x 10^-06 erg/cm2 and the 1-sec peak flux measured from\nT+5.63 sec in the 15-150 keV band is 1.5 +- 0.1 ph/cm2/sec.  \nA fit to a simple power law gives a photon index of 1.85 +- 0.08\n(chi squared 52.99 for 57 d.o.f.).  All the quoted errors are at the 90%\nconfidence level.",
  "circularId": 4864,
  "createdOn": 1142183359000,
  "email": "Scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 060312:  Refined analysis of the Swift-BAT burst",
  "submitter": "Scott Barthelmy at NASA/GSFC  <Scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 060312"
}