<b>Field 38, 2nd digit</b>: Source of radial velocity

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Field 38, 2nd digit: Source of radial velocity

There are three principal sources of radial velocity data used in the present compilation: the General Catalogue of Stellar Radial Velocities (Wilson 1953) and the catalogue of Evans (1978), both accessed via the SIMBAD data base, and the catalogue of Barbier-Brossat (1989) which was later included in the INCA data base. The correspondence between the letters used in this field and the source of the data, along with the number of stars whose radial velocity was taken from this source, is given in Table B4 gif.



The data given here are very incomplete as they do not include most radial velocities obtained by cross-correlation methods (not yet published or published in small lists). Furthermore, they do not include the results of the ongoing observations organised in parallel with the work of preparation of the Hipparcos Input Catalogue. In the northern hemisphere, a radial velocity programme for early-type stars brighter than mag has been in progress since mid-1982 using objective-prism techniques and a slit spectrograph (Fehrenbach & Burnage 1985; Grenier 1988; Burnage et al. 1988). In the southern hemisphere, three ESO key-programmes have been in progress since the end of 1988, two for early-type stars (one for stars nearer than 100pc, one for stars in OB and early-A associations), and one for late-type stars using the Coravel spectrometer (one measurement has already been obtained for each of the 20000 or so stars on the observing programme). These three programmes are described by Gerbaldi et al. (1990), Hensberge et al. (1990), and Mayor et al. (1990).

The Meudon Hipparcos Input Catalogue Team
mer 16 nov 15:51:31 MET 1994