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Fig. 5


Top plot: light curve of K2-3 from the MEarth-south survey, folded at the best period P = 31.8 days found using GLS. Middle plot: GLS periodogram of the MEarth light curve. The green line corresponds to the window function of the measurements (bottom plot), which is shifted in frequency so that the peak is superimposed on the major peak of the RV periodogram to directly identify alias frequencies.

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