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   PR #    71
   The scientific goals are to obtain the best spatial resolved
   spectrumof the poor cluster MKW3S and to make the origin of poor
   clustersclear. MKW3s has a central dominant galaxy at the peak of the
   X-raysurface brightness. The accretion of gas onto the central galaxy
   isthought to influence its evolution. This idae will be supported by
   themeasurement of the temperature gradient.The mapping of iron line
   mayalso have an impact upon the study of the evolution of
   clusters,because poor clusters could be in the course of evolution.
   Maincalibration goal is the spectroscopy of a diffuse source which has
   thewide range of surface brightness.
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