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   PR # 12137
    We propose to observe the 9 day eclisping LMXRB X0921-630. The X-ray
    source in this system is hidden behind an accretion disk and we
    observe X-rays scattered by an accretion disk corona, ADC.This causes
    the eclipse to be partial and to last for one day. The 1 day eclipse
    duration of X0921-630 is the longest of the ADC sources and unlike
    the others is well matched to avoid interuptions due to the orbital
    period of ASCA. We propose to use the unprecendented spectral capabil
    ities of ASCA to map the X-ray line emission region from X0921-630.
    The spectrum we obtain with ASCA will be fit using a radiative
    transfer code that reproduces the photoionized conditions in the ADC.


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