We present optical and near-infrared imaging covering a \sim 1.53 deg ^ { 2 } region in the Super-Cluster Assisted Shear Survey ( SuperCLASS ) field , which aims to make the first robust weak lensing measurement at radio wavelengths .
We derive photometric redshifts for \approx 176,000 sources down to i ^ { \prime } _ { AB } \sim 24 and present photometric redshifts for 1.4 GHz e -MERLIN and VLA detected radio sources found in the central 0.26 deg ^ { 2 } .
We compile an initial catalog of 149 radio sources brighter than S _ { 1.4 } > 75 \mu Jy and find their photometric redshifts span 0 < z _ { phot } < 4 with radio luminosities between 10 ^ { 21 } -10 ^ { 25 } W Hz ^ { -1 } , with medians of \langle z \rangle = 0.55 and \langle L _ { 1.4 } \rangle = 1.9 \times 10 ^ { 23 } W Hz ^ { -1 } respectively .
We find 95 % of the \mu Jy radio source sample ( 141/149 ) have SEDs best fit by star-forming templates while 5 % ( 8/149 ) are better fit by AGN .
Spectral indices are calculated for sources with radio observations from VLA and GMRT at 325 MHz , with an average spectral slope of \alpha = 0.59 \pm 0.04 .
Using the full photometric redshift catalog we construct a density map at the redshift of the known galaxy clusters , z = 0.20 \pm 0.08 .
Four of the five clusters are prominently detected at > 7 \sigma in the density map and we confirm the photometric redshifts are consistent with previously measured spectra from a few galaxies at the cluster centers .