ORFEUS-SPAS-II EXTREME-ULTRAVIOLET SPECTROSCOPY OF EPSILON-CANIS MAJORIS (B2-II)

We report on extreme-ultraviolet (EUV) spectroscopic observations of t he B bright giant epsilon Canis Majoris made during the ORFEUS-SPAS II mission. We assess the performance of the instrument in the EUV and f ind that the effective area is roughly 3 times that of the Extreme-Ult raviolet Explorer long-wavelength spectrometer and that the spectral r esolution is lambda/Delta lambda approximate to 1250. We identify most of the features, qualitatively compare different models, and examine the wind-broadened O V and Si IV lines, which display blue-edge veloci ties up to 800 km s(-1).