{
  "bibcode": "2023GCN.35152....1M",
  "body": "C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), M. J. Moss (GSFC),\nD. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU), M. Stamatikos (OSU)\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 231117A (trigger #1197027)\n(Laha, et al., GCN Circ. 35071).  The BAT ground-calculated position is\nRA, Dec = 332.404, 13.516 deg which is\n   RA(J2000)  =  22h 09m 37.0s\n   Dec(J2000) = +13d 30' 58.1\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 83%.\n\nThe mask-weighted light curve shows a very strong fast rise exponential decay profile\nwith potential precursor emission prior to the main pulse.\nT90 (15-350 keV) is 0.67 +- 0.07 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.42 to T+1.30 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.55 +- 0.04.  The fluence in the 15-150 keV band is 2.3 +- 0.1 x 10^-06 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.05 sec in the 15-150 keV band\nis 28.9 +- 0.7 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/1197027/BA/\n\n\n\n\n",
  "submitter": "Tyler Parsotan  at NASA GSFC <tyler.parsotan@nasa.gov>",
  "subject": "GRB 231117A: Swift-BAT refined analysis",
  "submittedHow": "email",
  "circularId": 35152,
  "eventId": "GRB 231117A",
  "createdOn": 1700596705496
}