This project was partially supported by the British-Polish Joint Research Collaboration Programme. K.Gesicki acknowledges partial support from Polish KBN grant No. 2.P03D.002.13. We thank Agnes Acker for providing the [NII] data in Fig. 2. Jeremy Walsh was involved in the observations; he is also thanked for careful reading of the manuscript.
© European Southern Observatory (ESO) 2000
Online publication: June 20, 2000