{
  "bibcode": "2019GCN.24941....1K",
  "body": "H. A. Krimm (NSF), S. D. Barthelmy (GSFC),  J. R. Cummings (CPI),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-240 to T+962 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 190630C (trigger #912239)\n(Ukwatta, et al., GCN Circ. 24927).  The BAT ground-calculated position is\nRA, Dec = 293.890, -32.759 deg which is \n  RA(J2000)  =  19h 35m 33.6s \n  Dec(J2000) = -32d 45' 32.5\" \nwith an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 57%.\n\nThe mask-weighted light curve shows a single FRED-shaped burst, beginning \nat ~T-5 sec, peaking at T+0 sec, and declining to background by ~T+40 sec.\nA spacecraft slew took the burst position out of the BAT field of view just before\nT+500 sec. T90 (15-350 keV) is 38.4 +- 9.3 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-1.92 to T+50.23 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.96 +- 0.11.  The fluence in the 15-150 keV band is 2.3 +- 0.2 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T-0.12 sec in the 15-150 keV band\nis 2.0 +- 0.3 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/912239/BA/",
  "circularId": 24941,
  "createdOn": 1561993131000,
  "email": "hkrimm@nsf.gov",
  "subject": "GRB 190630C: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NSF/NASA-GSFC  <hkrimm@nsf.gov>",
  "eventId": "GRB 190630C"
}