SUMMARY OF PROPOSAL 41233
DR. YASUSHI IKEBE
THE INSTITUTE OF PHYSICAL AND CHEMICAL RESEARCH (RIKEN)
SAITAMA JAPAN 351-01
WAKO-SHI
2-1 HIROSAWA

  E-mail: IKEBE@POSTMAN.RIKEN.GO.JP	Tel: 048-462-1111 EX.3228	Fax: 048-462-4640
  Medium: 4GBDAT

Subject: CLUSTERS OF GALAXIES AND SUPERCLUSTERS                      
  Title: ARE CLUSTERS WHICH HAVE RADIO HALO ALWAYS MERGERS?                              


Abstract:
 Some clusters have diffuse radio emission, which means the relativistic electorons
 are distributing in a cluster-size scale. However, the origin of the relativistic
 electrons is unknown. One possible explanation is that they are induced by the
 cluster merger. To judge this idea is true or not, we propose to observe ABELL 2255
 which has an radio halo emission. The evidence of the merger can be seen in its inhomogeneous temperature distribution.

 Co-Is:
   1  MAKOTO HATTORI      	MPE                           GERMANY   
      (No Co-I contact data)


Target Name           PRI RA        Dec        Time TC  Off GIS SIS_Cts  Obs
-------------------   --- --------  --------   ---- --  --- --- -------  ---
ABELL2255              2  258.1296   64.0926    100   N   N   P  0.20000   1