Similar to the [normalizations](https://docs.astropy.org/en/stable/timeseries/lombscargle.html#lomb-scargle-normalization) in the astropy `LombScargle`, we need to add a normalization parameter to multitaper spectral estimates.
Similar to the normalizations in the astropy
LombScargle, we need to add a normalization parameter to multitaper spectral estimates.