Astronomical Image Processing with Array Detectors

Details Astronomical Image Processing with Array Detectors Astronomical Image Processing with Array Detectors

2007-06-23

arxiv.org/abs/0706.3481v1

PASP 2007 (August), 119, 871

Astronomy and Astrophysics

Astrophysics

31 pages, 5 figures, accepted for publication in the PASP

Scientific paper

10.1086/521109

We address the question of astronomical image processing from data obtained with array detectors. We define and analyze the cases of evenly, regularly, and irregularly sampled maps for idealized (i.e., infinite) and realistic (i.e., finite) detectors. We concentrate on the effect of interpolation on the maps, and the choice of the kernel used to accomplish this task. We show how the normalization intrinsic to the interpolation process must be carefully accounted for when dealing with irregularly sampled grids. We also analyze the effect of missing or dead pixels in the array, and their consequences for the Nyquist sampling criterion.

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