{
  "body": "D. M. Palmer (LANL), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nM. Moss (GSFC), T. Parsotan (GSFC/UMBC),\nT. Sakamoto (AGU),M. Stamatikos (OSU)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-61 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 231129A (trigger #1199764)\n(Gropp et al., GCN Circ. 35208).  The BAT ground-calculated position is\nRA, Dec = 317.541, 41.530 deg which is\n   RA(J2000)  =  21h 10m 09.8s\n   Dec(J2000) = +41d 31' 48.3\"\nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 46%.\n\nThe BAT  light curve shows a complex structure with a duration of ~ 130 sec.\nT90 (15-350 keV) is 105.46 +- 1.83 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-1.75 to T+118.97 sec is best fit by a power law\nwith an exponential cutoff.  This fit gives a photon index 1.35 +- 0.17,\nand Epeak of 83.7 +- 14.6 keV (chi squared 51.44 for 56 d.o.f.).  For this\nmodel the total fluence in the 15-150 keV band is 1.3 +- 0.0 x 10^-05 erg/cm2\nand the 1-sec peak flux measured from T+88.71 sec in the 15-150 keV band is\n4.8 +- 0.3 ph/cm2/sec.  A fit to a simple power law gives a photon index\nof 1.78 +- 0.04 (chi squared 70.95 for 57 d.o.f.).  All the quoted errors\nare at the 90% confidence level.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/1199764/BA/\n\n\n",
  "submittedHow": "email",
  "bibcode": "2023GCN.35241....1P",
  "createdOn": 1701384105338,
  "eventId": "GRB 231129A",
  "circularId": 35241,
  "submitter": "Sibasish Laha at GSFC <sibasish.laha@nasa.gov>",
  "subject": "GRB 231129A: Swift-BAT refined analysis"
}