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Astron. Astrophys. 355, 743-750 (2000) AcknowledgementsWe would like to thank C.J. Henney, J. Leibacher, R. Nigam, B. Gelly F. Baudin and T. Appourchaux for fruitful discussions. S. Thiery is very grateful to T. Appourchaux for providing the maximum Likelihood program which is the starting point for this work. SOHO is a mission of international cooperation between ESA and NASA. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 2000 Online publication: March 9, 2000 ![]() |