We thank the referee, George Preston, for kindly confirming the small zero-point shift that we found in the radial velocities published in his 1994 paper, and for helpful remarks which have enabled to improve the paper. We are indebted to Don VandenBerg for providing isochrones in advance of publication, and John Norris for providing results on CS 22876-32 in advance of publication. The Carlsberg Foundation is gratefully acknowledged for financial support to BN. This work has made use of the CDS, operated by the CNRS.
© European Southern Observatory (ESO) 2000
Online publication: August 23, 2000