{
  "bibcode": "2013GCN.15354....1U",
  "body": "T. N. Ukwatta (MSU), 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), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC),\nA. Melandri (INAF-OAB), D. M. Palmer (LANL), T. Sakamoto (AGU),\nG. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 131018A (trigger #574935)\n(Melandri, et al., GCN Circ. 15349).  The BAT ground-calculated position is\nRA, Dec = 98.473, -19.897 deg which is\n  RA(J2000)  =  06h 33m 53.4s\n  Dec(J2000) = -19d 53' 48.5\"\nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n\nThe mask-weighted light curve shows a single long peak starts at ~T+21 sec\nand ends at ~T+118 sec. T90 (15-350 keV) is 73.22 +- 18.97 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T+21.10 to T+117.74 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.24 +- 0.14.  The fluence in the 15-150 keV band is 1.1 +- 0.1 x 10^-06 erg/cm2.\nThe 1-sec peak photon flux measured from T+59.41 sec in the 15-150 keV band\nis 0.5 +- 0.1 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/574935/BA/",
  "circularId": 15354,
  "createdOn": 1382137721000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 131018A, Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 131018A"
}