{
  "bibcode": "2018GCN.23555....1K",
  "body": "H. A. Krimm (NSF/USRA), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), A. Melandri (INAF-OAB),\nD. M. Palmer (LANL), T. Sakamoto (AGU),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+450 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 181224A (trigger #878911)\n(Melandri et al., GCN Circ. 23554).  The BAT ground-calculated position is\nRA, Dec = 125.949, 6.194 deg which is\n  RA(J2000)  =  08h 23m 47.7s\n  Dec(J2000) = +06d 11' 39.9\"\nwith an uncertainty of 1.9 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 80%.\n\nThe mask-weighted light curve shows a single-peaked structure that starts at\n~ T-12 s, peaks at ~ T+1 s, one ends at ~ T+4 s. T90 (15-350 keV) is\n12.5 +- 4.2 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-12.04 to T+3.30 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.27 +- 0.20.  The fluence in the 15-150 keV band is 4.9 +- 0.6 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.48 sec in the 15-150 keV band\nis 1.0 +- 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\nhttp://gcn.gsfc.nasa.gov/notices_s/878911/BA/",
  "circularId": 23555,
  "createdOn": 1545707875000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 181224A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 181224A"
}