Fig. 3

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Generalized Lomb-Scargle periodograms of the CARMENES RVs and spectral activity indicators from serval and raccoon. Horizontal lines show the theoretical FAP levels of 10% (short-dashed line), 1% (long-dashed line), and 0.1% (short-long-dashed line) for each panel. The vertical dashed lines mark the orbital frequencies of the transiting planet (fb = 0.174 d−1) and of the stellar signal at 0.033 d−1 and its second harmonic (0.066 d−1) determined by Stefansson et al. (2020). Panel a: CARMENES RVs from serval. Panel b: CARMENES RVs after modeling the signal from the transiting planet with a sinusoid. Panel c: CARMENES RVs after modeling the signals from the transiting planet and the second harmonic of the rotation period of the star with a double sinusoid. Panels d–f : CCF FWHM, CCF bisector span (CCF BIS), and CCF contrast (CCF CTR) from raccoon. Panels g–i: chromatic index (CRX), differential line width (dLW), Hα, and CaII IRT line indices from serval. Panel m: Window function.
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