We warmly thank Ingo Lehmann and Günther Hasinger for their help in the wobble correction procedure for the analysis of the HRI data, and Gianni Zamorani for helpful discussions. We also thanks the referee for halpful comments. The radio image has been retrieved by the web archive of the DRAGNs by Leahy, Bridle and Strom (http://www.jb.man.ac.uk/atlas/). This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operating by the Jet Propulsion Laboratory, California Institute of Technology under contract with the National Areonautic and Space Administration. This work has been partially supported by the Italian Space Agency (ASI-ARS-96-70).
© European Southern Observatory (ESO) 1999
Online publication: December 22, 1998