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Fig. A.1
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Full MLP power spectrum for all RV time series used, as well as their respective activity time series. Horizontal dashed lines indicate FAP levels of 10%, 1%, and 0.1%. The cyan, green, magenta, and blue vertical lines indicate the period of GJ 581 e, GJ 581 b, GJ 581 c and the 66.7 d signal, respectively.
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