Power density spectrum (in units of ppm²/μHz) for a duty cycle of 23%. The PDS is calculated with a least-squares sinewave fit on the incomplete time series (top panel), using an FFT on the CLEANed time series (middle panel) and an FFT on the inpainted time series (bottom panel). The errors correspond to the difference between the original PDS and the PDS estimated from the incomplete data. The inset corresponds to the spectral window of the time series.