$\pm$ 0.001 & -0.000 & 0.003 & 0.0 & 0.0 & 0.0\
TD & 0.099 $\pm$ 0.004 & 0.421 $\pm$ 0.002 & 0.421 & 0.525 & 3.8 & 4.2 & unknown\
Synthetic TD & 0.097 $\pm$ 0.003 & 0.394 $\pm$ 0.002 & 0.393 & 0.500 & 3.3 & 3.8 & 3.6\
Smoothed TD & 0.109 $\pm$ 0.004 & 0.589 $\pm$ 0.003 & 0.589 & 0.595 & 5.6 & 5.6 & unknown\
Synthetic smoothed TD & 0.105 $\pm$ 0.004 & 0.604 $\pm$ 0.004 & 0.603 & 0.608 & 5.4 & 5.4 & 4.9\

In addition, we estimate the nonlinear fraction of power from the bicoherence using Equation . For the synthetic LCT data, we estimate a value of $\hatfNL=3.6\%$; see third to last column in Table \[tabResults\]. This value is roughly consistent with the true value given the bias introduced by the higher-order term in Equation . This bias is due to the actual power spectrum of the synthetic data being larger than the real data by a factor of $1+\fNL(\bk)$ (see Eq. ). This reduces the value of the bicoherence by the same amount and results in a small negative bias; see also Figure \[figCompBispecBicohDataSynth\]. It is possible to compensate 