ACS after SM4: Sensitivity, Low Frequency Flats, And Geometric Distortion

Details ACS after SM4: Sensitivity, Low Frequency Flats, And Geometric Distortion ACS after SM4: Sensitivity, Low Frequency Flats, And Geometric Distortion

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21546205m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #462.05; Bulletin of the American Astronomical Society, Vol. 42, p.493

Astronomy and Astrophysics

Astronomy

Scientific paper

Following the repair of the WFC in May 2009, the CCD monitoring program has been used to assess the stability of the detector sensitivity, low frequency flat fields, and geometric distortion. These star field observations indicate that the average sensitivity is stable to better than 1% over the lifetime of the detector, and the zeropoints derived for the -81C operating temperature (implemented in July 2006) are still accurate following SM4. These observations have also been used to verify the CCD gain and full well depths with the new ACS electronics. No significant changes to the low frequency flat fields, distortion solutions, or predicted CTE losses have been found.

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