... WFC3 Data Handbook > Chapter 7: WFC3/IR Sources of Error > 7.8 Pixel Defects and Bad Imaging Regions . ... Pixel Defects and Bad Imaging Regions . ... 7.8.3 Dead Pixels . ... All pixels found anomalous enough to potentially impact data analysis results are flagged and listed in the current bad pixel table reference file. ... In total, 3,358 pixels are flagged as dead (0.3% of the detector?s light-sensitive pixels), and are marked with a 4 in the bad pixel table (see WFC3 ISR 2010-13 for details). ...