Calibration Access and Data Handbook

Functionality

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

d|D

A dead pixel gives no data and kills other pixels transfered through it.

h|H

A hot pixel delivers a high, nearly constant, signal independent of X-ray illumination almost every readout.

f|F

A flickering pixel depends on both the CCD settings and the throughput of charge.

p|P

A pin-hole defect in the aluminium light shield.