Science grade SITe CCDs (thinned, AR coated, dual amplifier) were installed
in the KPNO Mosaic during June 1998 and tested at the 4-m in July 1998.
This page describes some of the main properties of these CCDs.
Here is a dome flat of the array, taken at the 4-m by Taft in July 1998. The cosmetics of the array are excellent, but you can see some large scale low amplitude (5-15%) QE variations, especially in chip 6 (top row, second from left).