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   PR # 12142
    We propose an ASCA observation of the unusual binary star LSI+61 303.
    High-energy gamma radiation detected by both the EGRET telescope on
    Compton GRO and by the COS B satellite has been associated with this
    system. It is also a periodic, highly variable radio source.  Despite
    numerous observations at other wavelengths the physical environment
    of the source is poorly understood.  The diagnostic power of X-ray
    observations in the .2 - 10 keV band would be enormous. An ASCA obser
    vation would contribute substantially to understanding the details of
    energy release near the compact object.  We propose one 20,000 second
    observation of the source to take place between periastron passage
    and the phase at which the non-thermal radio emission begins to
   decay.
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