We are indebted to D.O.S. Wood as well as to D.J. Wilner for supplying their VLA data in FITS format. Without these data, large parts of our work would not have been possible. B. Stecklum is grateful for P. Bouchet's help with the ADONIS system. Also, M. Feldt acknowledges the invaluable assistance of M. Robberto and M. Gai during the observations at the TIRGO telescope. M.Feldt is being funded by the Max-Planck-Society, Germany. R. Klein is funded by grant No. 50 OR 9414 9 of BMBF Verbundforschung fürAstronomie/Astrophysik . We thank an anonymous referee for extensive comments which helped to greatly improve the paper.
© European Southern Observatory (ESO) 1998
Online publication: October 22, 1998