{
  "subject": "GRB 260925A: Swift-BAT refined analysis",
  "createdOn": 1790527401340,
  "eventId": "GRB 260925A",
  "submittedHow": "email",
  "body": "D. Sadaula (GSFC/UMBC), E. Ambrosi (INAF-IASFPA), S. D. Barthelmy (GSFC),\nR. Gupta (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U\nTampa), C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), T.\nParsotan (GSFC), T. Sakamoto (AGU) (i.e. the Swift-BAT team):\n\nUsing the data set from T-119 to T+723 sec from the recent telemetry\ndownlink, we report further analysis of BAT GRB 260925A (trigger #1513316)\n(Ambrosi et al., GCN Circ. 45739).  The BAT ground-calculated position is\nRA, Dec = 132.475, 24.972 deg which is\n   RA(J2000)  =  08h 49m 54.0s\n   Dec(J2000) = +24d 58' 18.5\"\nwith an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The\npartial coding was 100%.\n\nThe mask-weighted light curve shows a weak pulse that starts at ~T0, peaks\nat ~T+1 s, and end at ~T+3 s. The pulse is potentially followed by some\nweak tail emission that lasts till ~T+40 s.  T90 (15-350 keV) is 35.42 +-\n10.55 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T+0.48 to T+40.41 sec is best fit by a\nsimple power-law model.  The power law index of the time-averaged spectrum\nis 1.60 +- 0.44.  The fluence in the 15-150 keV band is 2.4 +- 0.7 x 10^-07\nerg/cm2. The 1-sec peak photon flux measured from T+1.10 sec in the 15-150\nkeV band is 0.6 +- 0.1 ph/cm2/sec.  All the quoted errors are at the 90%\nconfidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttps://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1513316\n",
  "submitter": "Amy <yarleen@gmail.com>",
  "circularId": 45770
}