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    PR # 32077                                                                   
     We propose simultaneous observations of LMC X-4 with ASCA and HST.          
     For pulsars, illumination of the accretion disk by a rotating beam of       
     X-rays should result in pulsed UV emission lines with Doppler shifts        
     corresponding to projected gas velocities. Simultaneous high time           
     resolution X-ray and UV spectra thus offer a fundamentally new              
     approach to understanding the gas flows in these systems.  We will          
     look for correlations of UV variability with X-ray variability and          
     for lags in pulse waveforms. By observing UV echoes of X-ray                
     variations with the HST/GHRS, we can map the dynamics of a precessing       
     accretion disk and other structures in the accretion flow. The UV           
     lines, X-ray Fe lines at 6-7 keV, and soft X-ray lines will                 
    complement each other as plasm                                               
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