Fig. 1
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Generalized Lomb-Scargle periodograms of the ESPRESSO RVs of K2-157 after subtracting a quadratic trend (upper panel) and the RV signals of Candidate#1 (C#1; middle panel) and Candidate#2 (C#2; lower panel). The circles indicate the maximum power frequencies and are highlighted in green when they correspond to a significant signal (FAP < 0.1%).
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