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Astron. Astrophys. 347, 434-441 (1999) AcknowledgementsThe data have been obtained partly on discretionary time from the direction of CFHT. The authors are grateful for this privilege. FC and IB are supported by contracts ARC 94/99-178 "Action de Recherche Concertée de la Communauté Française" (Belgium), and Pôle d'Attraction Interuniversitaire P4/05 (SSTC, Belgium). Retrieval of HST archive images was done through the service of CADC, which is operated by NRC, Herzberg Institute of Astrophysics and Dominion Astrophysics Laboratory. Finally, thanks are due to the referee for his very useful suggestions.
© European Southern Observatory (ESO) 1999 Online publication: June 30, 1999 ![]() |