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   PR # 41207
   RD J13434+0001 is a Type-2 QSO at Z=2.35 discovered by Almanini et
   al. in the course of their optical identification of the X-ray source
   survey with ROSAT. It has X-ray luminosity (0.4-6.7 keV at rest) more
   than 10^45 erg/s, as luminous as to be classified to QSO, and show no
   UV broad emisiion lines. This is the one and only one example of
   X-ray luminous Type-2 QSO at such high redhisft (larger than 2) and
   thus potentially very important object which should be observed with
   ASCA at more higher energy range (at 2-35 keV at rest). The results
   constrain this object is a heavily absorved QSO or "naked QSO"
   without any broad-line region, and give many impacts in searching for
   type-2 QSO at high redshift and in understanding the origin of Cosmic
   X-ray Background.
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