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   PR # 41247
   We propose to observe ROSAT detected group of galaxies accompanied
   with hot diffuse gas. Since metal abundances of these intragroup
   medium show similar value of that for intracluster medium or very low
   value of < 0.1, whether the origin of this diffuse gas is closely
   related to that of cluster or not is unclear. RXJ1756.5 is X-ray
   bright group of galaxies and one of the best candidate for ASCA to do
   this kind of study, whose metal abundance has not been determined
   yet.
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