{
  "bibcode": "2008GCN..8404....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC),\nH. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD),\nD. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC),\nG. Sato (ISAS), M. Stamatikos (GSFC/ORAU), G. Stratta (ASDC),\nJ. Tueller (GSFC), T. N. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 081024 (trigger #332516)\n(Stratta, et al., GCN Circ. 8398).  The BAT ground-calculated position is\nRA, Dec = 27.891, 61.352 deg which is\n  RA(J2000)  =  01h 51m 33.8s\n  Dec(J2000) = +61d 21' 08.2\"\nwith an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).\nThis position is 1.3 arcmin from the enhanced XRT position (Beardmore et\nal. GCN Circ. 8403).  The partial coding was 97%.\n\nThe mask-weighted lightcurve shows a slightly softer precursor peak about\n0.05 sec long at T-1.7 sec, a peak about 0.3 seconds long at T-0.2 sec and\nthe largest peak 0.1 seconds long at T0.  T90 (15-350 keV) is 1.8 +- 0.6 \nsec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T-1.7 to T+0.3 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.23 +- 0.21.  The fluence in the 15-150 keV band is\n1.2 +- 0.2 x 10-07 erg/cm2.  The 1-sec peak photon flux measured from\nT-0.73 sec in the 15-150 keV band is 1.1 +- 0.1 ph/cm2/sec.  All the quoted\nerrors are at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/332516/BA/",
  "circularId": 8404,
  "createdOn": 1224859915000,
  "email": "jayc@milkyway.gsfc.nasa.gov",
  "subject": "GRB 081024, Swift-BAT refined analysis",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <jayc@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 081024"
}