SUMMARY OF PROPOSAL 41226
MR. HIROHIKO HONDA
ISAS
KANAGAWA JAPAN 229
SAGAMIHARA
3-1-1,YOSHINO-DAI

  E-mail: HONDA@ASTRO.ISAS.AC.JP	Tel: (0427)51-3911	Fax: (0427)51-4253
  Medium: 4GBDAT

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: EVOLUTION OF MERGING CLUSTER                                                    


Abstract:
 Irregular clusters of galaxies give us an great opportunity to investigate a merging
 process in evolution of clusters. Since such clusters include several sub-clusters
 interacting each other, their distributions of temparature and metalicity may differ
 between different stages of evolution. Preceeding the ASCA satellite, however, it
 was impossible to determine such important quantities becuase no instrument could
 image clusters with arc-minutes resolution in hard X-ray band. The ASCA has good
 energy resolution and moderate spacial resolution in wider energy band up to 10keV,
 which enables us to measure spacial distributions of temparature and metalicity in
 the clusters. Here we propose to observe two irregular clusters A1644 and A2384 in order to unveil the mystery of cluster merging.

 Co-Is:
   1  TUNEO KII           	ISAS                          JAPAN     
      (No Co-I contact data)
   2  RYOU SHIBATA        	ISAS                          JAPAN     
   3  MASAHARU HIRAYAMA   	UNIV. OF TOKYO                JAPAN     
   4  ISAMU HATUKADE      	MIYAZAKI UNIV                 JAPAN     
   5  HAJIME INOUE        	ISAS                          JAPAN     


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
A1644                  3  194.3675  -17.3872    40   N   N   P  1.60000   1