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Fig. 2

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Radial velocities (RV) of HE 0107−5240 versus heliocentric Julian date (HJD), together with the best-fit RV model. The inset within the middle panel shows ESPRESSO RV points after subtracting the best-fit model. The root mean square (RMS) of all residuals is indicated in the middle panel, while the RMS values from each spectrograph are given in the bottom panels.

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