{
  "bibcode": "2010GCN.10716....1P",
  "body": "D. M. Palmer (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),\nJ. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),\nJ. Mao (INAF-OAB), C. B. Markwardt (GSFC/UMD), T. Sakamoto (GSFC/UMBC),\nM. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-239 to T+363 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 100504A (trigger #421124)\n(Mao, et al., GCN Circ. 10712).  The BAT ground-calculated position is\nRA, Dec = 255.575, -35.590 deg, which is \n   RA(J2000)  =  17h 02m 18.1s \n   Dec(J2000) = -35d 35' 23.0\" \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 92%.\n \nThe mask-weighted light curve shows two overlapping peaks followed by a\nweak third peak, starting at ~T-10 sec, peaking at T+0, T+8, and ~T+90 sec,\nand ending at ~T+100 sec.  T90 (15-350 keV) is 97.3 +- 7.3 sec\n(estimated error including systematics).\n \nThe time-averaged spectrum from T-9.7 to T+102.2 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.76 +- 0.10.  The fluence in the 15-150 keV band is 2.4 +- 0.1 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+7.60 sec in the 15-150 keV band\nis 1.7 +- 0.2 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/421124/BA/",
  "circularId": 10716,
  "createdOn": 1273032079000,
  "email": "scott@lheamail.gsfc.nasa.gov",
  "subject": "GRB 100504A: Swift-BAT refined analysis",
  "submitter": "Scott Barthelmy at NASA/GSFC  <scott@lheamail.gsfc.nasa.gov>",
  "eventId": "GRB 100504A"
}