High-resolution optical spectrograph

We have observed three subgiants HD 23249 (KO), HD 198149 (KO), HD 222404 (Kl) and three dwarfs HD 10780 (KO), HD 4628 (K2), HD 201091 (K5), on 2002 November 28 and 29, with the high-resolution cross-dispersed echelle spectrograph SOFIN, mounted on the Nordic Optical Telescope (NOT). They are in the solar neighbourhood (< 15 pc), are very bright (V < 6) and have modest projected rotational velocities (v sin i < 4 km s 1) to limit blends between spectral lines. They also do not present any evidence for emission (or a moderate one, as in the case of the three dwarfs) in the core of Ca II H and K lines. 

In spectroscopic literature [4.1-5] the name spectrometer is often used for both types of instruments. The introduction of optical multichannel analyzers (see Sect.4.5.9) as detectors behind spectrographs combines the advantages of high spectral and time resolution with simultaneous detection of extended spectral ranges. 

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