******************************************************
   PR # 22043
    We propose to use ASCA to study HT Cas, the brightest hard X-ray     
    source among deeply eclipsing dwarf novae.  We have detected the     
    eclipse at the 3.8$\sigma$ level, in a ROSAT observation when the    
    system was in an unusual low state.  We will repeat the experiment   
    in a normal state and extending to higher energies; we will also     
    achieve a higher S/N with ASCA.  In addition, the superior           
    spectroscopic capability of ASCA will be used to investigate the     
    physics of X-ray emission; we were unable to distinguish among       
    different models with the ROSAT data.                                
 ******************************************************