We thank Ralf Kohley (Bonn) and the staff of the Calar Alto Observatory for their help in obtaining the WWFPP data at the 1.23m telescope and Klaus Reif (Bonn) for his support with the Hoher List observations. We thank the referee, Dr. O. Bienaymé, for suggesting to include a calculation of the asymmetric drift. This research project was supported in part by the Deutsche Forschungs-Gemeinschaft under grant Bo 779/11 as well as through observing support grants Bo 779/12 and Bo 779/18. YAS thanks the DFG for a doctoral thesis stipendium in the framework of cooperation between the DFG and the Instituto de Astrofisica de Canarias. MO was supported by a grant from the Bundesministerium für Forschung und Technologie (FKZ 0100023 6) and by the European Community through a Marie Curie research fellowship (ERBFMBICT 961511). For our research we made with pleasure use of the SIMBAD in Strasbourg.
© European Southern Observatory (ESO) 1997
Online publication: April 6, 1998