{
  "submitter": "Tyler Parsotan  at NASA GSFC <tyler.parsotan@nasa.gov>",
  "body": "M. Stamatikos (OSU), S. D. Barthelmy (GSFC),\n\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\n\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\n\nD. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\n\nT. Sakamoto (AGU), (i.e. the Swift-BAT team):\n\n\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\n\nwe report further analysis of BAT GRB 230728A (trigger #1181187)\n\n(Salvaggio, et al., GCN Circ. 34282).  The BAT ground-calculated position is\n\nRA, Dec = 343.514, 28.169 deg which is\n\n   RA(J2000)  =  22h 54m 03.4s\n\n   Dec(J2000) = +28d 10' 09.5\"\n\nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\n\nThe partial coding was 49%.\n\n\n\nHe mask-weighted light curve shows a complex multi-peaked structure with some\n\nemission prior to the trigger time.\n\nT90 (15-350 keV) is 15.10 +- 0.89 sec (estimated error including systematics).\n\n\n\nThe time-averaged spectrum from T-5.62 to T+10.74 sec is best fit by a simple\n\npower-law model.  The power law index of the time-averaged spectrum is\n\n1.58 +- 0.13.  The fluence in the 15-150 keV band is 1.1 +- 0.1 x 10^-06 erg/cm2.\n\nThe 1-sec peak photon flux measured from T+0.41 sec in the 15-150 keV band\n\nis 2.5 +- 0.3 ph/cm2/sec.  All the quoted errors are at the 90% confidence\n\nlevel.\n\n\n\nThe results of the batgrbproduct analysis are available at\n\nhttp://gcn.gsfc.nasa.gov/notices_s/1181187/BA/\n\n",
  "subject": "GRB 230728A: Swift-BAT refined analysis",
  "eventId": "GRB 230728A",
  "submittedHow": "email",
  "bibcode": "2023GCN.34299....1S",
  "createdOn": 1690808237567,
  "circularId": 34299
}