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Hubble Space Telescope
ACS anomalies and artifacts

Figure: This WFC frame exhibits bias offsets between amplifier quadrants, correlated noise imposed by the distortion correction (Moire-like pattern), and glint (scattered light centered on the interchip gap). Click to enlarge image.

Listed below are various detector artifacts and anomalies that ACS users might see in their data. See also the more detailed HLA report, ACS CCD Image Anomalies in the Hubble Legacy Archive.

General HST observing anomalies

ACS optical features and artifacts

Dragon's Breath and Edge Glow

Interactive viewers demonstrating the effects of dragons breath and edge glow using archival images.

ACS detector features

ACS detector artifacts

Artifacts generated by image processing and combination