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   PR #   123
   Ophiuchus cluster of galaxies is first identified as X-ray
   source4U1708-23 by UHURU satellite at a redshift z=0.028. This is one
   of the nearest cluster such as Coma and Perseus and has highest
   temperature among those clusters(kT=9-10keV). By the HRI observation
   of Einstein, the X-ray surface brightness profileimplies central high
   density of about 10^-2cm^-3 and the presence of a cooling flow
   depositing about 140 solar-mass/yr. The previous X-ray imaging
   observation was done within central region ofthe cluster with small
   effective area. We propose the sevral pointing observations around the
   cluster by ASCAand search for spatial variation of spectra such as
   temperature orabundances of heavy elements and also density profile of
   hot gas modifiedby cooling flow.
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