{
  "body": "S. D. Barthelmy (GSFC), S. Dichiara (PSU), R. Gupta (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa),\nC. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 250925A (trigger #1352124)\n(Dichiara, et al., GCN Circ. 41985).  The BAT ground-calculated position is\nRA, Dec = 341.207, 46.549 deg which is\n   RA(J2000)  =  22h 44m 49.7s\n   Dec(J2000) = +46d 32' 57.0\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 76%.\n\nThe mask-weighted light curve shows a broad, multi-peaked structure starting at ~T-25 sec and decaying to background by T+50 sec. T90 (15-350 keV) is 64.51 +- 6.59 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-23.52 to T+64.42 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.87 +- 0.09.  The fluence in the 15-150 keV band is 2.7 +- 0.1 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.19 sec in the 15-150 keV band\nis 1.2 +- 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\nhttps://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1352124\n\n\n\n",
  "createdOn": 1758901861352,
  "submitter": "Hans Krimm at NSF/NASA-GSFC <hkrimm@nsf.gov>",
  "subject": "GRB 250925A: Swift-BAT refined analysis",
  "submittedHow": "email",
  "eventId": "GRB 250925A",
  "circularId": 42006,
  "bibcode": "2025GCN.42006....1B"
}