We wish to thank Pierre Magain and Peter Stetson for making available the MCS-code and DAOHPOT-II respectively. We have benefitted from stimulating discussions with R. Fosbury and J. Vernet on the subject of dust scattering, and with C. Jean on the subject of reddening models of galaxy spectra. We thank the anonymous referee for valuable comments that clarified the paper on essential points. JUF thanks the European Southern Observatory for support from the ESO studentship programme. IB thanks the European Southern Observatory for support from the ESO visitor programme. IB was supported in part by contract ARC94/99-178 "Action de Recherche Concertée de la Communauté Française (Belgium)" and Pôle d'Attraction Interuniversitaire, P4/05 (SSTC, Belgium).
© European Southern Observatory (ESO) 2000
Online publication: June 26, 2000