Fig. 2
Upper panel: FIES radial velocities of Kepler-423 – after subtracting the systemic velocity Vγ – versus BJDTDB and Keplerian fit to the data. Lower panel: bisector spans of the FIES cross-correlation functions versus RV measurements, after subtracting the systemic velocity Vγ. Error bars in the CCF bisector spans are taken to be twice the uncertainties in the RV data.
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