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   52045
   We propose to observe 4U1700-37 simultaneously with ASCA, HST, and XTE
   at 2 binary phase intervals (in and out of eclipse). The X-ray spectrum
   is soft with numerous lines during eclipse and hard and non-thermal
   outside eclipse; several UV P Cygni profiles show changes with orbital
   phase and possibly X-ray intensity. The X-ray flux is dominated by
   flaring activity (likely representing inhomogeneities in the wind)
   involving intensity increases by factors of 10-100 on timescales
   (1000s) not as yet resolved in the ultraviolet. We will examine the UV
   emission on timescales that fully resolve the X-ray variability. This
   will enable us to analyze the density structure and composition of the
   wind and test models for X-ray/UV line emission in wind-fed accretion
   systems.
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