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   61155
   Optically quiet quasars(OQQs) are compact radio-loud and X-ray-bright
   active gal actic nuclei with very weak optical continuum emission.
   Several explanations hav e been proposed for the inverted spectral
   energy distribution of OQQs but the na ture of this class of object is
   yet unknown. We propose observations of two OQQs candidates with ASCA
   in order to clarify the emission mechanism of OQQs and its possible
   contribution for CXB spectrum.
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