{
  "bibcode": "2009GCN.10264....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC),\nE. A. Hoversten (PSU), H. A. Krimm (GSFC/USRA),\nC. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), A. M. Parsons (GSFC),\nT. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU),\nJ. Tueller (GSFC), T. N. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-61 to T+242 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 091208A (trigger \n#378554) (Hoversten, et al., GCN Circ. 10253).  The BAT ground-\ncalculated position is RA, Dec = 0.295, 65.680 deg which is\n    RA(J2000)  =  00h 01m 10.9s\n    Dec(J2000) = +65d 40' 47.7\"\nwith an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 88%.\n\nThe mask-weighted light curve shows a single FRED with some additional\nstructure on the decaying side. The tail appears to be quite long at\nlow energy, with emission detectable for up to 200 seconds after the \ntrigger. T90 (15-350 keV) is 29.1 +- 2.5 sec (estimated error including \nsystematics).\n\nThe time-averaged spectrum from T-0.3 to T+32.8 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n0.81 +- 0.10.  The fluence in the 15-150 keV band is 1.5 +- 0.1 x 10^-06\nerg/cm2.  The 1-sec peak photon flux measured from T+0.15 sec in the \n15-150 keV band is 1.8 +- 0.2 ph/cm2/sec.  All the quoted errors are at \nthe 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/378554/BA/",
  "circularId": 10264,
  "createdOn": 1260287936000,
  "email": "james.r.cummings@nasa.gov",
  "subject": "GRB 091208A Swift-BAT refined analysis",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <james.r.cummings@nasa.gov>",
  "eventId": "GRB 091208A"
}