Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21943002r&link_type=abstract
American Astronomical Society, AAS Meeting #219, #430.02
Astronomy and Astrophysics
Astrophysics
Scientific paper
We demonstrate a simple, yet general, new formalism for the optimized linear combination of astrophysical images. The formalism allows the user to combine multiple undersampled images to provide oversampled output at high precision. The proposed method is general and may be used for any configuration of input pixels and point spread function; it also provides the noise covariance in the output image along with a powerful metric for undesired distortions due to the linear image combination. The method explicitly provides knowledge and control of the inevitable compromise between noise and fidelity in the output image. In this poster we present a first implementation of the method called IMCOM, which has been put to practical use in demonstrating the recovery of fully-sampled output images from simulated, undersampled input exposures that are designed to mimic the proposed Wide Field InfraRed Survey Telescope (WFIRST). We also show early results from a first study using IMCOM with real data from a laboratory detector characterization experiment at the Caltech Optical Observatories facility, which will use the ability of IMCOM to resample a heavily undersampled focal plane to explore the small-scale structure of detectors for use in a dark energy mission.
Hirata Christopher
Rhodes Jason
Rowe Barnaby
Seshadri Sridhar
Smith Rachel
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