V.ade acknowledges the financial support by the 'Onderzoeksfonds K.U.Leuven' (senior research fellowship F/95/62). Á. Csík is grateful to the Hungarian Soros Foundation and the 'Onderzoeksfonds K.U.Leuven'. This work was partly carried out while R. Erdélyi was a doctoral student financed by the Research Council of the Katholieke Universiteit Leuven, Belgium (OT/92/8). The support by the K.U.L. Research Council is greatly acknowledged. R. Erdélyi was also supported by the grant GR/K43315 from the PPARC of the U.K.
© European Southern Observatory (ESO) 1997
Online publication: April 8, 1998