******************************************************
   PR # 12183
    We propose to use the high energy resolution and broad spectral cover
    age of the SIS on ASCA to test models of emission line behavior in X-
    ray binaries.A model developed by us that incorporates a realistic re
    presentation of an accretion disk corona predicts strong emission fro
    m the H-like ions of O,Ne,Mg,Si,& Fe,as well as strong Fe K$\alpha$ e
    mission.ASCA is ideal for detecting these lines,owing to its ability
    to distinguish them from the lines of He-like ions,& to separate the
    H-like lines from K$\alpha$.Observation of the predicted lines will
    provide the first physical tests of ADC models and set constraints di
    stinctly different from those derived from X-ray light curves.We sele
    ct sources which enable the study of Fe emission around the binary or
   bit for comparison with light
 ******************************************************