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   51191
   We propose ASCA observations of two ultraluminous infrared
   galaxies(ULIRGs). Judged from the far-infrared color, starburst
   activity is still prosperous in these objects, but based on the radio
   and far-infrared luminosity ratio, these objects must have AGNs.
   Namely, we would be able to detect the strong X-ray emission from
   newborn AGNs in the ULIRGs' sample. This proposal is essential to check
   the scenario which describes that ULIRGs evolve into AGNs (Sanders et
   al.1988).
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