{
  "bibcode": "2016GCN.18919....1U",
  "body": "T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC),\nN. Gehrels (GSFC), L. M. Z. Hagen (PSU), H. A. Krimm (GSFC/USRA),\nA. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),\nT. Sakamoto (AGU), M. Stamatikos (OSU), (i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+340 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 160121A (trigger #671231)\n(Hagen, et al., GCN Circ. 18912).  The BAT ground-calculated position is\nRA, Dec = 109.080, -23.590 deg which is\n    RA(J2000)  =  07h 16m 19.1s\n    Dec(J2000) = -23d 35' 25.5\"\nwith an uncertainty of 1.2 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 91%.\n\nThe mask-weighted light curve shows a single peak starting at T-4 sec,\npeaking at T+3 sec and returning to baseline by T+14 sec. T90 (15-350 keV)\nis 12.0 +- 2.4 sec (estimated error including systematics).\n\nThe time-averaged spectrum from T-0.03 to T+14.97 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.77 +- 0.13.  The fluence in the 15-150 keV band is 6.1 +- 0.5 x 10^-7 erg/cm2.\nThe 1-sec peak photon flux measured from T+2.76 sec in the 15-150 keV band\nis 1.2 +- 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/671231/BA/",
  "circularId": 18919,
  "createdOn": 1453416434000,
  "email": "hans.a.krimm@nasa.gov",
  "subject": "GRB 160121A: Swift-BAT refined analysis",
  "submitter": "Hans Krimm at NASA-GSFC  <hans.a.krimm@nasa.gov>",
  "eventId": "GRB 160121A"
}