{
  "subject": "GRB 230815A: Swift-BAT refined analysis",
  "body": "S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), A. Y. Lien (U Tampa),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),\nM. Stamatikos (OSU) (i.e. the Swift-BAT team):\n\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 230815A (trigger #1185505)\n(Klingler, et al., GCN Circ. 34434). The BAT ground-calculated position is\nRA, Dec = 184.760, -58.067 deg which is\nRA(J2000) = 12h 19m 02.4s\nDec(J2000) = -58d 03' 59.5\"\nwith an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 11%.\n\n\nThe mask-weighted light curve shows a strong peak at trigger time with precursor emission\nAt T-14 sec from trigger. T90 (15-350 keV) is 17.00 +- 7.62 sec (estimated error including systematics).\n\n\nThe time-averaged spectrum from T-14.78 to T+9.22 sec is best fit by a simple\npower-law model. The power law index of the time-averaged spectrum is\n1.19 +- 0.10. The fluence in the 15-150 keV band is 5.2 +- 0.3 x 10^-06 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.22 sec in the 15-150 keV band\nis 13.7 +- 1.1 ph/cm2/sec. All the quoted errors are at the 90% confidence\nlevel.\n\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1185505/BA/\n\n\n\n\n\n\n\n",
  "bibcode": "2023GCN.34449....1L",
  "circularId": 34449,
  "createdOn": 1692201835439,
  "eventId": "GRB 230815A",
  "submittedHow": "email",
  "submitter": "Tyler Parsotan  at NASA GSFC <tyler.parsotan@nasa.gov>"
}