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   PR # 11081
    We propose X-ray observations of isolated elliptical galaxies. All
    the target shave fluxes equal to or greater than 1e-12 ergs/s/cm2.
    The prime aim is tomeasure temperature, mass, metal abundance of hot
    ISM. From abundance ratiosamong heavy metals, we determine which type
    of SN (I or II) is the maincontributor to heavy metal in hot ISM and
    study the rate and period of birthand death of stars. The other
    important aim is to measure the mass and distribution of gravitating
    matter, which has a strong influence on thermal and dynamical evolut-
    ion of hot ISM.



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