/home/chrism/cosmem/fisher_population_table.py:1062: RuntimeWarning: M_tot=2.019e+04 Msun requires fs >= 2.6937 Hz but the highest available tier is 2.0 Hz.  Using fs=2.0 Hz.  The merger/ringdown may be aliased.
  fs_ev, T_ev, fmin_ev, fmax_ev, df_taper_ev = get_lisa_fs_duration(