{
  "bibcode": "2023GCN.33519....1L",
  "body": "S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC),\nS. B. Cenko (GSFC), H. A. Krimm (NSF),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU), M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-826 to T+962 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 230322B (trigger #1161127)\n(Cenko et al., GCN Circ. 33505).  The BAT ground-calculated position is\nRA, Dec = 16.550, -47.709 deg which is\n   RA(J2000)  =  01h 06m 12.1s\n   Dec(J2000) = -47d 42' 31.2\"\nwith an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 92%.\n\nThe mask-weighted light curve shows a single-peaked FRED-like structure\nthat starts at ~T-3 s, peaks at ~T0, and ends at ~T+11 s.\nT90 (15-350 keV) is 11.61 +- 2.17 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-2.41 to T+11.12 sec is best fit by a\nsimple\npower-law model.  The power law index of the time-averaged spectrum is\n2.07 +- 0.26.  The fluence in the 15-150 keV band is 3.7 +- 0.6 x 10^-7\nerg/cm2.\nThe 1-sec peak photon flux measured from T+0.02 sec in the 15-150 keV band\nis 1.1 +- 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/1161127/BA/",
  "circularId": 33519,
  "createdOn": 1679763677000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 230322B: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 230322B"
}