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Table 3

Spectrographs used for this paper with their spectral resolution, wavelength coverage, and mean S/N from the spectra used.

Spectrograph Resolution Spectral range Mean S/N

HARPS 115 000 378−691 nm 642
UVES 110 000 480−1100 nm 212
ESPaDOnS 81 000 370−1050 nm 775
FIES 67 000 370−730 nm 763
FEROS 48 000 350−920 nm 208

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