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Fig. 12


HR diagram of the 1420 candidates with a colour code corresponding to their stability level 3σRVS. The less stable stars, with 3σRVS > 300 m s-1, are indicated as black points. Those are not suitable for calibrating the RVS instrument. The HR diagram is divided into four parts corresponding roughly to turn-off, main sequence, subgiants, and giants where median RV scatter, and the fractions of stable and variable stars have been evaluated (Table 6).

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