{
  "bibcode": "2022GCN.32496....1S",
  "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),\nR. Caputo (GSFC), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 220826A (trigger #1121751)\n(Caputo et al., GCN Circ. 32484).  The BAT ground-calculated position is\nRA, Dec = 206.421, -44.036 deg which is\n   RA(J2000)  =  13h 45m 41.0s\n   Dec(J2000) = -44d 02' 10.1\"\nwith an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 92%.\n\nThe mask-weighted light curve shows a multi-peaked structure that\nstarts at ~T0 and ends at ~T+13 s. There are roughly three main\npeaks at ~T+1 s, ~T+7 s, and ~T+11 s. respectively.\nT90 (15-350 keV) is 11.14 +- 1.02 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-0.20 to T+13.01 sec is best fit\nby a simple power-law model.  The power law index of the time-averaged\nspectrum is 1.44 +- 0.10.  The fluence in the 15-150 keV band\nis 1.2 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured\nfrom T+6.58 sec in the 15-150 keV band is 2.6 +- 0.2 ph/cm2/sec.\nAll the quoted errors are at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1121751/BA/",
  "circularId": 32496,
  "createdOn": 1661629826000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 220826A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 220826A"
}