We thank the Tautenburg, Palomar and UKST Observatories for supplying the plates. The APM is a national astronomy facility financed by the Particle Physics and Astronomy Research Council. The data of the second epoch Palomar plate were received via the STScI Digitised Sky Survey. This research has made use of the NASA/IPAC extragalactic database (NED) which is operated by the Jet Propulsion Laboratory, Caltech, under contract with the National Aeronautics and Space Administration. We would also like to thank H.-J. Tucholke for his help with the Münster (MRSP) software installation. MO gratefully acknowledges financial support from the European Community through a postdoctoral research fellowship (ERBFMBICT961511). We wish to thank the referee, Dr. Cudworth for his suggestions and comments.
© European Southern Observatory (ESO) 1998
Online publication: April 20, 1998