Chapter 4:
ACS Error Sources

4.1 Readout Noise and A-to-D Conversion

4.1.1 Readout Noise

4.1.2 A-to-D Conversion

4.2 Bias Issues

4.2.1 Bias Calibration

4.2.2 Bias Jump

4.2.3 Post-SM4 WFC Signal-dependent Bias Shift

4.2.4 Bias Subarrays for WFC and HRC

4.3 Dark Current, Hot Pixels, and Cosmic Rays

4.3.1 Dark Current

4.3.2 Hot Pixels

4.3.3 Cosmic Rays

4.4 Flat Fields

4.4.1 Ground Flats (P-flats)

4.4.2 L-flats

4.4.3 Pipeline Flats

4.4.4 Earth Flat Verification for the HRC

4.4.5 Sky Flats for the WFC

4.5 Image Anomalies

4.5.1 Dust Motes

4.5.2 Optical Ghosts and Scattered Light

4.5.3 Cross-talk

4.5.4 Scattered Earth Light

4.5.5 CTE

4.5.6 HRC Polarimetry

4.6 Generic Detector and Camera Properties

4.6.1 Gain Calibration

4.6.2 Full Well Depth

4.6.3 Linearity at Low to Moderate Intensity

4.6.4 Linearity Beyond Saturation

4.6.5 Shutter Stability