{
  "bibcode": "2009GCN..9494....1B",
  "body": "S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC),\nE. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nC. B. Markwardt (GSFC/UMD), F. E. Marshall (NASA/GSFC) D. M. Palmer (LANL),\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-60 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 090607 (trigger #354299)\n(Marshall, et al., GCN Circ. 9491).  The BAT ground-calculated position is\nRA, Dec = 191.194, 44.108 deg, which is \n   RA(J2000)  =  12h 44m 46.7s \n   Dec(J2000) = +44d 06' 28.4\" \nwith an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 96%.\n \nThe mask-weighted light curve shows two narrow peaks.  The first starts\nat T-0.1 sec, peaks at T+0.1 sec, and ends at T+0.7sec.  The second peak\nstarts at ~T+1.7 sec, peaks at T+2.2 sec, and ends at T+2.5 sec.  There is\nno hint of emission out to at least T+243 sec.  T90 (15-350 keV) is\n2.3 +- 0.1 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T+0.1 to T+2.5 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.25 +- 0.30.  The fluence in the 15-150 keV band is 1.1 +- 0.2 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.01 sec in the 15-150 keV band\nis 0.7 +- 0.1 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel. \n\nBased on the shortness of the duration and the spectral hardness, we believe\nthis to be a short hard burst.\n \nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/354299/BA/",
  "circularId": 9494,
  "createdOn": 1244374322000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 090607: Swift-BAT refined analysis of the SHB",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 090607"
}