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Astron. Astrophys. 364, 732-740 (2000) AcknowledgementsThe Australia Telescope is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. ARD is an Alexander von Humboldt research Fellow and thanks the Stiftung for their support. The authors gratefully acknowledge P. Slane for helpful comments and suggestions on the manuscript. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 2000 Online publication: January 29, 2001 ![]() |