{
  "subject": "GRB 240419A: Swift-BAT refined analysis",
  "submitter": "Mike Moss at NASA GSFC <mikejmoss3@gmail.com>",
  "submittedHow": "web",
  "body": "T. Parsotan (GSFC), 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. Sakamoto (AGU), M. H. Siegel (PSU)\n(i.e. the Swift-BAT team):\n \nUsing the data set from T-60 to T+243 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 240419A (trigger #1222955)\n(Siegel, et al., GCN Circ. 36169).  The BAT ground-calculated position is\nRA, Dec = 94.505, -44.964 deg which is\n   RA(J2000)  =  06h 18m 01.3s\n   Dec(J2000) = -44d 57' 50.2\"\nwith an uncertainty of 3.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 89%.\n \nThe mask-weighted light curve shows two dim pulses at T0-7 s and T0+0 s,\nrespectively.\nThe T90 (15-350 keV) is 3.00 +- 1.41 sec (estimated error including systematics).\n \nThe time-averaged spectrum from T-0.43 to T+2.57 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.71 +- 0.38.  The fluence in the 15-150 keV band is 8.4 +- 2.1 x 10^-08 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.57 sec in the 15-150 keV band\nis 0.6 +- 0.1 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/1222955",
  "circularId": 36255,
  "createdOn": 1713877227560,
  "bibcode": "2024GCN.36255....1P",
  "eventId": "GRB 240419A"
}