Fig. 5
Top-left panel: radial velocity of TX Psa versus heliocentric Julian day. Top-middle panel: Lomb-Scargle periodogram (solid line) with indication of the power peak corresponding to the rotation period P = 1.080 d. The dotted red line indicates the window spectral function, whereas the horizontal dashed line represents the power level corresponding to a FAP = 0.02. Top-right panel: clean periodogram. Bottom panel: RV curve phased with the rotation period. The red solid line represents the sinusoidal fit with the rotation period.
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