Comparison between the PSDs of an evenly sampled light curve and flare-biased light curve. Left-side plot: Light curve we generated using the bending power-law PSD with parameters β = 2 and x_b = 500. The grey light curve has been evenly sampled, and the black light curve has flare bias. Right-side plot: Obtained periodograms. The periodogram in grey shows the PSD of the light curve with even sampling. The periodogram in orange is the mean periodogram of 1000 realisations using the same parameters and even sampling. The black periodogram is the periodogram of the flare-biased light curve. The purple periodogram is the mean periodogram of 1000 realisations using the same parameters and replicated sampling. Because the replicated periods of denser sampling only randomly occur during flares in simulated light curves, the effect of interpolation is stronger than on the black periodogram.