*************************************************************************
   61197
   The result of Hattori's cluster, AX J2019+1127, indicates a large metal
   abundance in high-z clusters (z~1). This proposal is to verify the
   indication. The cluster of galaxies around a radio galaxy 3CR184
   (z=0.996) was found with HST and ground-based telescopes. There were
   excesses in galaxy density in both projection and redshift directions.
   Also, a gravitational arc with HST lead to a virial mass of 6E14 h50^-1
   solar masses, which is double of Hattori's cluster or Coma cluster.
   This is a large rich cluster with a similar mass and redshift as
   Hattori's dark cluster, and, therefore, is a good target to find out a
   red-shifted strong iron line.
 *************************************************************************