Calibration Access and Data Handbook

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Bad parts of the CCD surfaces are identified by their starting coordinates RAWX,RAWY and length YLENGTH$\ge1$ and fall into different categories DESCRIPTION in lower case for uplinked quantities or upper case in the CCF only

A dead pixel gives no data and kills other pixels transfered through it.
A hot pixel delivers a high, nearly constant, signal independent of X-ray illumination almost every readout.
A flickering pixel depends on both the CCD settings and the throughput of charge.
A pin-hole defect in the aluminium light shield.

Michael Smith 2011-09-20