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D.A. Liedahl, F. Paerels, M.Y. Hur, S.M. Kahn, A. Fruscione, and S. Bowyer
The Seyfert 1 galaxy Mrk 478, observed during the EUVE all-sky survey, is the brightest EUV source among its class. The SW spectrum of this object shows evidence of discrete emission, although this interpretation is tentative, since the source spectrum must be extracted against a bright background. If the EUV flux is, in fact, composed partly of line emission, we consider the implications if this is the result of emission from a collision-driven plasma at temperatures ~> 1E6 K. In this context, we discuss some of the constraints imposed on the emission-line region by this observation.
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