{
  "bibcode": "2008GCN..8709....1F",
  "body": "E. E. Fenimore (LANL), S. D. Barthelmy (GSFC),\nW. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),\nN. Gehrels (GSFC), D. Grupe (PSU), H. A. Krimm (GSFC/USRA),\nC. B. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. M. Palmer (LANL),\nA. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS),\nM. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-119 to T+183 sec from the recent telemetry \ndownlink,\nwe report further analysis of BAT GRB 081222 (trigger #337914)\n(Grupe, et al., GCN Circ. 8691).  The BAT ground-calculated position is\nRA, Dec = 22.748, -34.095 deg which is\n  RA(J2000)  =  01h 30m 59.5s\n  Dec(J2000) = -34d 05' 41.4\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe burst was in the fully-coded field of view.\n\nThe mask-weighted light curve shows a main peak with several subpeaks\nfrom about T+0 to T+20 sec and an exponential tail visible to about\nT+70 sec.  T90 (15-350 keV) is 24 +- 3 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-0.6 to T+38.0 sec is best fit by a \npower law\nwith an exponential cutoff.  This fit gives a photon index 1.08 +- 0.15,\nand Epeak of 131 +- 31 keV (chi squared 45.61 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 4.8 +- 0.1 x 10^-06 \nerg/cm2\nand the 1-sec peak flux measured from T+3.45 sec in the 15-150 keV band is\n7.7 +- 0.2 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 1.48 +- 0.03 (chi squared 68.25 for 57 d.o.f.).  All the quoted errors\nare at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/337914/BA/",
  "circularId": 8709,
  "createdOn": 1229974139000,
  "email": "jayc@milkyway.gsfc.nasa.gov",
  "subject": "GRB 081222, Swift-BAT refined analysis",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <jayc@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 081222"
}