slightly more detailed comment before psd normalization
@@ -814,7 +814,9 @@ class LombScarglePeriodogram(Periodogram):
# Power spectral density
if normalization == 'psd':
- # Rescale power to units of ppm^2 / [frequency unit]
+ # Rescale from the unnormalized power output by Astropy's
+ # Lomb-Scargle function to units of ppm^2 / [frequency unit]
+ # that may be of more interest for asteroseismology.
power *= 2./(len(time)*oversample_factor*fs) * (cds.ppm**2)
# Amplitude spectrum
