{
  "bibcode": "2019GCN.23780....1L",
  "body": "A. Y. Lien (GSFC/UMBC), S. D. Barthelmy (GSFC),  J. R. Cummings (CPI),\nA. D'Ai (INAF-IASFPA), H. A. Krimm (NSF/USRA), C. B. Markwardt (GSFC),\nD. M. Palmer (LANL), T. Sakamoto (AGU), 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 190123A (trigger #885314)\n(D'Ai, et al., GCN Circ. 23769).  The BAT ground-calculated position is\nRA, Dec = 53.175, 45.505 deg, which is\n   RA(J2000)  =  03h 32m 42.0s\n   Dec(J2000) = +45d 30' 16.3\"\nwith an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 64%.\n\nThe mask-weighted light curve shows a single FRED-shaped peak from about\nT-5 to T+20 sec, with a peak around T+3 sec.   Observations were discontinued\ndue to an observing constraint at ~T+325 sec.  T90 (15-350 keV) is\n24.4 +- 4.3 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-1.22 to T+28.06 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.13 +- 0.23.  The fluence in the 15-150 keV band is 8.4 +- 1.1 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T+4.82 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/885314/BA/",
  "circularId": 23780,
  "createdOn": 1548332411000,
  "email": "hkrimm@nsf.gov",
  "subject": "GRB 190123A: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NSF/NASA-GSFC  <hkrimm@nsf.gov>",
  "eventId": "GRB 190123A"
}