{
  "bibcode": "2021GCN.30513....1L",
  "body": "S. Laha (GSFC/UMBC), S. D. Barthelmy (GSFC),\nP. D'Avanzo (INAF-OAB), H. A. Krimm (NSF),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 210724A (trigger #1061482)\n(D'Avanzo et al., GCN Circ. 30497).  The BAT ground-calculated position is\nRA, Dec = 227.425, -6.279 deg which is\n   RA(J2000)  =  15h 09m 41.9s\n   Dec(J2000) = -06d 16' 42.9\"\nwith an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 34%.\n\nThe mask-weighted light curve shows a multi-peaked structure\nthat starts at ~T-40 s and ends at ~T+25 s. The main peak\noccurs at ~T0. T90 (15-350 keV) is 50.57 +- 9.54 sec (estimated\nerror including systematics).\n\nThe time-averaged spectrum from T-38.55 to T+25.50 sec is best\nfit by a simple power-law model.  The power law index of the\ntime-averaged  spectrum is 2.30 +- 0.28.  The fluence in the\n15-150 keV band is 1.8 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak\nphoton flux measured from T-0.51 sec in the 15-150 keV band\nis 2.5 +- 0.8 ph/cm2/sec.  All the quoted errors are at the\n90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1061482/BA/",
  "circularId": 30513,
  "createdOn": 1627242206000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 210724A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 210724A"
}