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Table 1

Properties of the different spectrographs used in this work.

Spectrograph Spectral range (Å) Resolving power N stars

SOPHIE 3872–6943 75 000 20
HARPS 3780–6910 115 000 16
ELODIE 3850–6800 42 000 6
FIES 3640–7360 67 000 4
FEROS 3500–9200 48 000 3
HERMES 3800–9000 85 000 2
HARPS-N 3830–6930 115 000 1
UVES 4780–6800 110 000 1

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