We present first results of an examination of the optical properties of the galaxy populations in SZE selected galaxy clusters .
Using clusters selected by the South Pole Telescope survey and deep multiband optical data from the Blanco Cosmology Survey , we measure the radial profile , the luminosity function , the blue fraction and the halo occupation number of the galaxy populations of these four clusters with redshifts ranging from 0.3 to 1 .
Our goal is to understand whether there are differences among the galaxy populations of these SZE selected clusters and previously studied clusters selected in the optical and the X-ray .
The radial distributions of galaxies in the four systems are consistent with NFW profiles with a galaxy concentration of 3 to 6 .
We show that the characteristic luminosities in griz bands are consistent with passively evolving populations emerging from a single burst at redshift z = 3 .
The faint end power law slope of the luminosity function is found to be on average \alpha \approx - 1.2 in griz .
Halo occupation numbers ( to m ^ { * } +2 ) for these systems appear to be consistent with those based on X-ray selected clusters .
The blue fraction estimated to 0.36 L ^ { * } , for the three lower redshift systems , suggests an increase with redshift , although with the current sample the uncertainties are still large .
Overall , this pilot study of the first four clusters provides no evidence that the galaxy populations in these systems differ significantly from those in previously studied cluster populations selected in the X-ray or the optical .