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   PR # 21511
    We propose 20000 second observations of the peculiar dipping LMXB    
    X1755-338 and the dipping/bursting LMXB X1323-619. The high spectral 
    resolution and low background of ASCA will let us study the chemical 
    composition and ionization state of matter far better than has yet   
    been possible. In X1755-338, for example, we will be able to probe   
    for an iron K-alpha line down to an equivalent width of ~8 eV (five  
    times better than the current limit) and thereby directly test the   
    White et al (1984) metal deficient model of this system. We will     
    search for relativistic line splitting, broadening, and shifting and 
    will use X1323-619 to test type I burst models.                      
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