Distribution of the energy losses in radiation-damaged pixels derived from measurements of the calibration ⁵⁵Fe corner sources data. This data were taken in March 2010 and shows a large range of values of the charge lost in a pixel over the area imaged by the corner sources. A total of 18 500 pixels are illuminated by the calibration sources and were used in the analysis. The energy is reported as a 12 bit digital number (1 DN corresponds to  ~ 2.75 eV), as measured by the Analog-to-Digital Converter. The analysis allows measurement of energy losses greater than 7 DN in individual pixels.