C1 1358+6245 ATz=0.32: an X-ray Selected, Distant, Rich Cluster of Galaxies

We present results of four-color (BVRI) CCD photometry of an extremely rich, x-ray selected cluster of galaxies, Cl 1358+6245. Spectroscopy of the optically dominant cluster galaxy indicate the cluster is at a redshift of z = 0.32. The photometric catalog contains 322 galaxies measured in at least two colors detected in the CCD field (2.4h_50_Mpc x 2.1h^-1^_50_ Mpc at the cluster redshift; q_0_=1/2). We include the cluster luminosity function and color-magnitude diagrams. Cl 1358+6245 is extremely rich (at least Abell Richness Class 3), contains a compact, concentrated core of galaxies, and exhibits the Butcher-Oemler effect with a blue galaxy fraction 0.10<f_b_<0.18 (depending on the background galaxy correction). Cl 1358+6245 is x-ray luminous. Three measurements of the x-ray luminosity of the cluster range from 4.3X10^44^ ergs s^-1^<L_x_(0.5-4.5 keV)<8.4X10^44^ ergs s^-1^ suggesting there may be a variable x-ray source in the field. The brightest cluster galaxy has an absolute visual magnitude M_v_= -22.89 in a 32h^-1^_ 50_ kpc diameter aperture, and a rest frame color of (B-V)_rf_= 0.94, consistent with the magnitude and color expected for the brightest galaxy in a rich cluster.