Further calculated spectra for ζ Puppis. Upper left: calculated state-of-the-art spectral energy distribution of the final model of ζ Puppis. Upper right: comparison of the ROSAT-observations (error bars) with the X-ray spectrum of the final model multiplied by the ROSAT PSPC response matrix (thick line)⁸. The calculated state-of-the-art optical spectrum of the final model of ζ Puppis is shown in the lower part. Lower left: spectral range from 3800 to 5800 Å. Lower right: spectral range from 5800 to 6800 Å.