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   PR # 22051
    We propose to observe the brightest, eclipsing X-ray polar to study  
    the spectral behavior.  Crude, time-resolved, hard X-ray spectroscopy
    will be possible for the first time.  The BBXRT data on the polar BY 
    Cam showed that the favored sites of emission (post-shock, pre-shock)
    did not contribute to the observed Fe K line.  An eclipsing polar can
    refine our understanding of the actual emission regions and test the 
    current models of polar accretion.  The important Fe L-shell lines   
    are expected to be detected, permitting estimates of the densities of
    the emitting regions.                                                
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