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   PR # 11030
    We proposed to observed GX301-2 with ASCA to obtain time resolved
    spectra over a 40ksec period when the neutron star is near periastron
    and thus very bright. The observations of the spectrum with ASCA's
    excellent spectral resolution and at different pulse phases will give
    strong constraints on the state and the geometry of the circumstellar
    matter, by comparing the iron line shape and continuum shape with
    those calculated by Monte Carlo simulations. GX301-2 is particularly
    suitable to such a study because it has a high column density of
    circumstellar matter and extremely strong fluorescent iron line
    emission.


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