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   71189
   Gioia & Luppino performed systematic arc survey. We made giant luminous
   arc statistics with an arc survey sample, which is a sub-sample of
   Gioia & Luppino's sample. There are 6 giant luminous arcs (GLA) found
   in the sub-sample. We performed ROSAT HRI observations for all the sub-
   sample clusters and made GLA statistics. We have concluded that no
   spherically symmetric lens models can reproduce observed frequency of
   GLAs in the sub-sample. We will complete intra-cluster gas temperature
   observations by ASCA for all the sub-sample clsuters during AO 6. We
   really need the intra-cluster gas temperature observation by ASCA for
   entire Gioia & Luppino's sample clusters. We propose 3 observations of
   clusters which are most luminous among the 15 Gioia & Luppino's sample
   clusters left to be observed.
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