Fig. 4

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Periodograms of models with an increasing complexity: from top to bottom: zero, one, two, and three planets as well as three planets + SHO kernel. Red arrows mark the subtracted signal for the following periodogram, the blue arrow indicates the potential stellar rotation period at ~125 d, the light blue arrow points at the 55 d signal. The labels indicate the model which is subtracted from the observation ‘O’ (see Table 3).
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