REDSHIFTS OF SOUTHERN CLUSTERS

We present new redshifts of ten rich clusters of galaxies of the Abell, Corwin, and Olowin cluster catalog (Abell's southern extension). These are the first results of a survey of southern cluster redshifts which we intend to complete out to z ≃ 0.1. In six clusters we measured the redshifts of the first and second brightest galaxy, obtaining typical differences of ≃650 km s-1. This gives confidence in both the identification of the brightest galaxies and the redshift measurement. We also found that the redshifts we obtained agree well with the log (cz)-m10 relationship.