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   52193
   The Butcher-Oemler cluster A2111 at z = 0.23 contains a considerable
   number of gas-rich disk-like galaxies and substantial substructures,
   indicating an ongoing subcluster merger. In particular, the ICM in the
   central region of the cluster appears filamentary and significantly
   cooler than in the outskirts, but shows no sharp X-ray emission peak as
   normally expected for a cooling flow. We intend to take advantage of
   ASCA to confirm and quantify the nonisothermal state of the ICM. This
   will help us to determine the origin and fate of the cool gas, and to
   assess the impact of the merger on the ICM structure and evolution and
   on the galaxy population of the cluster.
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