Fig. 4.
Power spectra (solid lines) in log-log scale of combined V and g-filter SAAO and ASAS-SN data (upper panel) and TESS data (bottom panel). The errors are marked by squares. A red flicker-noise trend, i.e. power ∼ frequency−1, is indicated by dashed lines for comparison. Nyquist frequencies are marked by vertical dotted lines.
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