{
  "submittedHow": "email",
  "subject": "GRB 260924A: Swift-BAT refined analysis",
  "circularId": 45733,
  "eventId": "GRB 260924A",
  "submitter": "Amy <yarleen@gmail.com>",
  "createdOn": 1790284117659,
  "body": "R. Gupta (GSFC), S. D. Barthelmy (GSFC), V. D'Elia (SSDC & INAF-OAR), H. A.\nKrimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt\n(GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), D.\nSadaula (GSFC/UMBC), T. Sakamoto (AGU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-180 to T+712 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 260924A (trigger #1513082)\n(D'Elia et al., GCN Circ. 45713).  The BAT ground-calculated position is\nRA, Dec = 133.754, 12.041 deg which is\n   RA(J2000)  =  08h 55m 00.9s\n   Dec(J2000) = +12d 02' 27.0\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The\npartial coding was 39%.\n\nThe mask-weighted light curve shows a bright multi-peaked structure that\nstarts at ~T-10 s and ends at ~T+450 s. There are roughly two distinct\nstructures. The first structure starts at ~T-10 s and ends at ~T+160 s and\nconsists of many overlapping pulses. The second structure is a single\nFRED-like pulse and starts at ~T+330 s, peaked at ~T+340 s, and ends at\n~T+400 s. T90 (15-350 keV) is 344.82 +- 1.78 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-5.96 to T+455.68 sec is best fit by a\nsimple power-law model.  The power law index of the time-averaged spectrum\nis 1.24 +- 0.02.  The fluence in the 15-150 keV band is 5.7 +- 0.1 x 10^-05\nerg/cm2. The 1-sec peak photon flux measured from T+338.78 sec in the\n15-150 keV band is 10.5 +- 0.4 ph/cm2/sec.  All the quoted errors are at\nthe 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttps://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1513082\n"
}