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Astron. Astrophys. 345, 635-642 (1999) AcknowledgementsDr. J. Lean kindly provided us with her compilation of the observed UV spectral irradiance variations, which we gratefully acknowledge. We are also grateful to CCP7 for the provision of a UNIX version of ATLAS. YCU would like to acknowledge support through the Fond zur Förderung der wissenschaftlichen Forschung under grant S7302-AST. The work of MF was supported by the Schweizerische Nationalfonds under grant No. 21-40428-94. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1999 Online publication: April 19, 1999 ![]() |