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   51139
   We propose ASCA observations of the BL Lac object PKS 1413+135 embedded
   in a spiral (S0) galaxy. The object has been observed by VLBI and HST.
   Perlman et al., who conducted the VLBI observations, obtained triple
   hotspots images. They argue it possibly supports the gravitational
   lense model for BL Lac objects which is proposed by Ostriker and Vieti
   (1990). On the contrary, McHardy et al., having carried out the HST
   observation, report there is no evidence of gravitational lensed
   images. We proposed to measure the X-ray spectrum of this source to
   determine whether it comes from a pure BL Lac object or from an OVV
   quasar. The ASCA results will provide an important information to the
   argument and the unified model of AGNs.
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