Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.8305c&link_type=abstract
American Astronomical Society, AAS Meeting #211, #83.05; Bulletin of the American Astronomical Society, Vol. 39, p.874
Astronomy and Astrophysics
Astronomy
Scientific paper
Interpixel capacitance (IPC) is the term given to the capacitive coupling effect between neighboring pixels in a focal plane array. The correlation in signal values introduced by this coupling affects photometric signal/noise ratios and causes degradation in spatial resolution. The latter is particularly important when one is studying the shape of an object, such as a distant galaxy, which is only partially resolved. Several methods have been used to measure the magnitude of the IPC for an array: Fe55 bombardment, autocorrelation, and single-pixel reset. These methods either determine the average IPC for the entire array and apply it to every pixel, or measure the IPC for a few pixels and apply it to the entire array. We present a new method of measuring IPC which enables us to determine its value for nearly every pixel in the array. This will both give us the ability to test for the existence of variability in the IPC, and allow us to correct for it on a very small scale.
Cole David M.
Hancock B.
Seshadri Sridhar
Smith Rachel
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