Nature of the UX URSA majoris-type nova-like variables: CPD-4801577

A series of low-dispersion spectra and one high-dispersion spectrum were obtained with the International Ultraviolet Explorer (IUE) spacecraft during 1983 April 19-20 and 1984 February 27-28. The ultraviolet spectra reveal broad, highly ionized, violet-displaced, asymmetric absorption features with C IV showing a P Cygni emission component as well. The inferred velocity of the outflowing wind is approx.3000 km s-1. An energy distribution fit covering the far-ultraviolet to infrared yields an accretion rate M/sub acc/roughly-equal5 x 10-9 M/sub sun/ yr-1. The derived parameters for CPD-4801577, as well as the appearance of its far-ultraviolet and optical (Wargau et al.) spectra, are very similar to those of the UX Ursa Majoris subclass of nova-like variables and firmly establish CPD-4801577 as a member. An SWP echelle spectrum revealed detailed line profile information for the N V, Si IV, and C IV resonance lines. He II lambda1640 is remarkably weak and even absent in two of the spectra. Column densities for lowly ionized interstellar features are derived from the echelle spectrum, but no distance information or constraints can be firmly established from them