{
  "bibcode": "2018GCN.22447....1S",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), H. A. Krimm (NSF/USRA),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), M. Stamatikos (OSU),\nT. N. Ukwatta (LANL) (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+963 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 180224A (trigger #811561)\n(Lien et al., GCN Circ. 22442).  The BAT ground-calculated position is\nRA, Dec = 202.675, 38.073 deg which is\n  RA(J2000)  =  13h 30m 41.9s\n  Dec(J2000) = +38d 04' 23.0\"\nwith an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 93%.\n\nThe mask-weighted light curve shows a FRED-like pulse that starts at ~ T0,\npeaks at ~ T+1 s, and ends at ~T+15 s. T90 (15-350 keV) is 10.9 +- 3.6 sec\n(estimated error including systematics).\n\nThe time-averaged spectrum from T-0.48 to T+14.57 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n2.11 +- 0.18.  The fluence in the 15-150 keV band is 4.7 +- 0.5 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T+0.40 sec in the 15-150 keV band\nis 1.4 +- 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\nhttp://gcn.gsfc.nasa.gov/notices_s/811561/BA/",
  "circularId": 22447,
  "createdOn": 1519582751000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 180224A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 180224A"
}