{
  "subject": "GRB 240419B: Swift-BAT refined analysis",
  "bibcode": "2024GCN.36292....1S",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC),\nH. A. Krimm (NSF), S. Laha (GSFC/UMBC),\nA. Y. Lien (U Tampa), C. B. Markwardt (GSFC),\nM. J. Moss (GSFC), D. M. Palmer (LANL),\nT. Parsotan (GSFC),(i.e. the Swift-BAT team):\n\nUsing the data set from T-61 to T+242 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 240419B (trigger #1223072)\n(Dichiara, et al., GCN Circ. 36180).  The BAT ground-calculated position is\nRA, Dec = 325.853, 4.299 deg which is\n   RA(J2000)  =  21h 43m 24.7s\n   Dec(J2000) = +04d 17' 58.2\"\nwith an uncertainty of 3.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 43%.\n\nThe BAT light curve shows a complex structure with a duration of ~ 150 sec.\nT90 (15-350 keV) is 132.16 +- 26.29 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-3.3 to T+159.5 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.92 +- 0.09.  The fluence in the 15-150 keV band is 4.1 +- 0.2 x 10^-06 erg/cm2.\nThe 1-sec peak photon flux measured from T+116.36 sec in the 15-150 keV band\nis 2.4 +- 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/1223072\n\n\n\n",
  "eventId": "GRB 240419B",
  "circularId": 36292,
  "submitter": "Sibasish Laha at GSFC <sibasish.laha@nasa.gov>",
  "createdOn": 1713995253282,
  "submittedHow": "email"
}