{
  "bibcode": "2009GCN..9641....1U",
  "body": "T. N. Ukwatta (GWU), 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), F. E. Marshall \n(NASA/GSFC),\nD. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC),\nG. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC),\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-61 to T+242 sec from the recent telemetry \ndownlink,\nwe report further analysis of BAT GRB 090709B (trigger #356912)\n(Marshall et al., GCN Circ. 9633).  The BAT ground-calculated position is\nRA, Dec = 93.522, 64.081 deg which is\n   RA(J2000)  =  06h 14m 05.4s\n   Dec(J2000) = +64d 04' 51.9\"\nwith an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 15%.\n\nThe mask-weighted light curve shows a main peak beginning at T-5 seconds \nand\ncontinuing until T+10 sec.  There are then two much weaker peaks at \napproximately\nT+25 and T+35 sec. At T+240 sec, a pre-planned spacecraft slew took the \nsource\nout of the BAT FOV. T90 (15-350 keV) is 27.2 +- 6.6 sec (estimated error \nincluding systematics).\n\nThe time-averaged spectrum from T-5.4 to T+35.9 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.51 +- 0.18.  The fluence in the 15-150 keV band is 1.5 +- 0.2 x 10-6 \nerg/cm2.\nThe 1-sec peak photon flux measured from T+1.47 sec in the 15-150 keV band\nis 2.1 +- 0.4 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/356912/BA/",
  "circularId": 9641,
  "createdOn": 1247180552000,
  "email": "hans.a.krimm@nasa.gov",
  "subject": "GRB 090709B, Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>",
  "eventId": "GRB 090709B"
}