{
  "bibcode": "2018GCN.22815....1S",
  "body": "M. Stamatikos (OSU), S. D. Barthelmy (GSFC), \nJ. R. Cummings (CPI), P. A. Evans (U Leicester),\nH. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), T. N. Ukwatta (LANL)\n(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 180620A (trigger #843122)\n(Evans et al., GCN Circ. 22798).  The BAT ground-calculated position is\nRA, Dec = 279.890, 23.239 deg which is \n  RA(J2000)  =  18h 39m 33.5s \n  Dec(J2000) = +23d 14' 18.6\" \nwith an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 42%.\n\nThe mask-weighted light curve shows a multi-peaked structure that starts\nat ~T-7 s and ends at ~T+37 s. The two main peaks occur at ~T+5 s and ~T+12 s,\nrespectively. T90 (15-350 keV) is 23.16 +- 4.82 sec (estimated error including \nsystematics).\n\nThe time-averaged spectrum from T-6.92 to T+37.07 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.72 +- 0.05.  The fluence in the 15-150 keV band is 5.8 +- 0.2 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T+4.47 sec in the 15-150 keV band\nis 7.7 +- 0.4 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/843122/BA/",
  "circularId": 22815,
  "createdOn": 1529548669000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 180620A: Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 180620A"
}