{
  "bibcode": "2009GCN..8936....1K",
  "body": "H. A. Krimm (GSFC/USRA),  S. D. Barthelmy (GSFC),\nA. P. Beardmore (U Leicester), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL),\nN. Gehrels (GSFC), 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), J. Tueller (GSFC),\nT. 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 090305 (trigger #345127)\n(Beardmore et al., GCN 8932).  The BAT ground-calculated position is\nRA, Dec = 241.764, -31.572 deg which is\n  RA(J2000)  =  16h 07m 03.5s\n  Dec(J2000) = -31d 34' 20.9\"\nwith an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment).\nThis position is 1.3 arcmin from the optical afterglow reported by\nCenko et al. (GCN Circ 8933). The partial coding was 50%.\n\nThe lightcurve consists of two pulses, the first about 0.08 seconds\nlong and the second about  0.28 seconds long.  T90 (15-350 keV) is\n0.4 +- 0.1 sec (estimated error including systematics).  There was\nvery little emission seen in the BAT low energy band, 15-25 keV.\n\nThe time-averaged spectrum from T+0.0 to T+0.4 sec is best fit by a\nsimple power-law model.  The power law index of the time-averaged\nspectrum is 0.86 +- 0.33.  The fluence in the 15-150 keV band is\n7.5 +- 1.3 x 10^-08 erg/cm2.  The 1-sec peak photon flux measured from\nT-0.29 sec in the 15-150 keV band is 1.9 +- 0.4 ph/cm2/sec.  All the\nquoted errors are at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/345127/BA/",
  "circularId": 8936,
  "createdOn": 1236276907000,
  "email": "james.r.cummings@nasa.gov",
  "subject": "GRB 090305, Swift-BAT refined analysis",
  "submitter": "Jay R. Cummings at NASA/GSFC/Swift  <james.r.cummings@nasa.gov>",
  "eventId": "GRB 090305"
}