If all non-UV light was filtered from sunlight, does this approximate a different type of black body radiation? Regular sunlight has a black-body temperature of 5777 K.

This is in relation to the problem of concentrating sunlight to a temperature higher than 5777 K. Thermodynamics rules this out. However, if only the UV portion of the solar spectrum is used in some hypothetical solar concentrator, could a temperature higher than 5777 K be achieved?