{
  "bibcode": "2023GCN.34675....1S",
  "createdOn": 1694488079887,
  "subject": "GRB 230911C: Swift-BAT refined analysis",
  "submitter": "Amy <yarleen@gmail.com>",
  "submittedHow": "email-legacy",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\nE. Sonbas (Adiyaman Univ.), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-61 to T+243 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 230911C (trigger #1191188)\n(Sonbas et al., GCN Circ. 34655).  The BAT ground-calculated position is\nRA, Dec = 226.796, -41.356 deg which is\n   RA(J2000)  =  15h 07m 11.0s\n   Dec(J2000) = -41d 21' 21.2\"\nwith an uncertainty of 2.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 95%.\n\nThe mask-weighted light curve shows multiple weak overlapping pulses that\nstart at ~T-9 s and end at ~T+10 s. T90 (15-350 keV) is 16.21 +- 2.89 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T-8.63 to T+9.58 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.26 +- 0.28.  The fluence in the 15-150 keV band is 3.8 +- 0.6 x 10^-7\nerg/cm2.\nThe 1-sec peak photon flux measured from T+2.07 sec in the 15-150 keV band\nis 0.7 +- 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/1191188/BA/\n",
  "circularId": 34675,
  "eventId": "GRB 230911C"
}