{
  "submitter": "Rahul Gupta at NASA GSFC <rahul.gupta@nasa.gov>",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC),\nR. Gupta (GSFC), H. A. Krimm (NSF),\nS. Laha (GSFC/UMBC), A. Y. Lien (U Tampa),\nC. B. Markwardt (GSFC), M. J. Moss (GSFC),\nD. M. Palmer (LANL), T. Parsotan (GSFC),\nD. Sadaula (GSFC/UMBC)(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 240720A (trigger #1243868)\n(Gupta, et al., GCN Circ. 36909).  The BAT ground-calculated position is\nRA, Dec = 96.728, 30.297 deg which is\n   RA(J2000)  =  06h 26m 54.6s\n   Dec(J2000) = +30d 17' 48.3\"\nwith an uncertainty of 2.8 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 57%.\n\nThe mask-weighted BAT light curve shows a short hard spike, followed by an extended softer emission with a duration of ~ 200 sec. T90 (15-350 keV) is 181.85 +- 73.84 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.12 to T+193.92 sec is best fit by a simple power-law model.  The power law index of the time-averaged spectrum is 1.47 +- 0.22.  The fluence in the 15-150 keV band is 1.8 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+0.44 sec in the 15-150 keV band is 2.5 +- 0.3 ph/cm2/sec.  All the quoted errors are at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttps://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1243868\n",
  "eventId": "GRB 240720A",
  "subject": "GRB 240720A: Swift-BAT refined analysis",
  "circularId": 36928,
  "bibcode": "2024GCN.36928....1S",
  "createdOn": 1721767932043,
  "submittedHow": "email"
}