{
  "bibcode": "2023GCN.33280....1S",
  "body": "T. Sakamoto (AGU), E. Ambrosi (INAF-IASFPA),\nS. D. Barthelmy (GSFC), H. A. Krimm (NSF),\nS. Laha (GSFC/UMBC), A. Y. Lien (U Tampa),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 230205A (trigger #1152764)\n(Ambrosi et al., GCN Circ. 33271).  The BAT ground-calculated position is\nRA, Dec = 202.057, 46.686 deg which is\n   RA(J2000)  =  13h 28m 13.7s\n   Dec(J2000) = +46d 41' 08.1\"\nwith an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 100%.\n\nThe mask-weighted light curve shows a short pulse that starts at ~T0,\npeaks at ~T+2 s, and ends at ~T+3 s. In addition, there may be some\nhint of extended emission that lasts till ~T+80 s. T90 (15-350 keV)\nis 2.30 +- 0.36 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T+0.32 to T+2.87 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.44 +- 0.29.  The fluence in the 15-150 keV band is 1.6 +- 0.3 x 10^-7\nerg/cm2.\nThe 1-sec peak photon flux measured from T+1.74 sec in the 15-150 keV band\nis 0.9 +- 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/1152764/BA/",
  "circularId": 33280,
  "createdOn": 1675656843000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 230205A: Swift-BAT refined analysis (T90 = 2.3 s)",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 230205A"
}