{
  "bibcode": "2009GCN..8769....1S",
  "body": "T. Sakamoto (GSFC/UMBC), 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), V. Mangano (INAF-IASFPA), C. B. Markwardt (GSFC/UMD),\nD. M. Palmer (LANL), 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-239 to T+963 sec from recent telemetry downlinks,\nwe report further analysis of BAT GRB 090102 (trigger #338895)\n(Mangano, et al., GCN Circ. 8762).  The BAT ground-calculated position is\nRA, Dec = 128.248, 33.107 deg, which is \n   RA(J2000)  =  08h 32m 59.5s \n   Dec(J2000) = +33d 06' 25.7\" \nwith an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 6%.\n \nThe mask-weighted light curve shows approximately 4 overlapping peaks\nstarting at ~T-14 sec, peaking at ~T+2 sec, and ending at ~T+15 sec.\nT90 (15-350 keV) is 27.0 +- 2.2 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-13.9 to T+18.7 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.36 +- 0.08.  The fluence in the 15-150 keV band is 6.8 +- 0.3 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+1.68 sec in the 15-150 keV band\nis 5.5 +- 0.8 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/338895/BA/",
  "circularId": 8769,
  "createdOn": 1230914119000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 090102: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 090102"
}