Pixel-Based CTE Correction Of ACS/WFC: Extended Sources

Details Pixel-Based CTE Correction Of ACS/WFC: Extended Sources Pixel-Based CTE Correction Of ACS/WFC: Extended Sources

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924106l&link_type=abstract

American Astronomical Society, AAS Meeting #219, #241.06

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The effect of CTE grows worse with time due to radiation damage to on-orbit CCD detectors. It affects objects the worst in the y-direction, along columns, though also to a much lesser degree across rows in the x-direction, and its effect is greatest when farthest from the relevant amplifier. It affects objects across a wide range of magnitudes, but the effects are worst in fainter sources, and affect photometry, astrometry, and the morphological shapes of sources. Using our new pixel-based CTE corrections, we perform an initial exploration of the effect primarily as seen along columns in the y-direction of the WFC at a recent epoch. Though not the primary focus in this poster, we ultimately aim to expand this study to examine more time-dependent effects on extended sources over the lifetime of the detector, as well as addressing the additional instantaneous effects of an object's x-position (minor effect) and especially its y-position (much larger effect) on the detector at a given epoch.

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