High-precision radial velocity measurements of some southern stars

Precise absolute radial velocities have been obtained at Mount John Univers ity Observatory for a number of southern stars, using the 1 m telescope and fiber-fed echelle spectrograph. Only the stars that have been observed thr ee or more times are presented, including 14 IAU standards and 11 program s tars. Six echelle orders in the green (5000-5600 Angstrom) are used. Many d elicate steps have been undertaken in order to maintain the same conditions in both recording and reducing the spectra over a period of 27 months. The Th-Ar lamp has been used for the wavelength calibration. The absolute radi al velocities have been determined by cross-correlation with synthetic spec tra computed by R. L. Kurucz. The zero point has been adjusted using blue-s ky spectra. An additional strong correlation, between the measured velociti es and photon counts in stellar and Th-Ar spectra, has been detected for th e PM3000 CCD camera and has been eliminated. A resulting precision of about 20-30 m s(-1) has been obtained. The overall uncertainty of the absolute r adial velocities was estimated to be about 100-200 m s(-1). The present pap er is a continuation of our recent previous work, including more details on the reduction process and the presentation of the radial velocities for mo re stars.