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AWAIC: A WISE Astronomical Image Co-adder

Masci, Frank J. and Fowler, John W. (2009) AWAIC: A WISE Astronomical Image Co-adder. In: Astronomical Data Analysis Software and Systems XVIII. ASP Conference Series. No.411. Astronomical Society of the Pacific , San Francisco, CA, pp. 67-76. ISBN 978-1-58381-702-5.

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We describe a new image co-addition tool, AWAIC, to support the creation of a digital image atlas from the multiple frame exposures acquired with the Wide-field Infrared Survey Explorer (WISE). AWAIC includes preparatory steps such as frame background matching and outlier detection using robust frame-stack statistics. Frame co-addition is based on using the detector’s Point Response Function (PRF) as an interpolation kernel. This kernel reduces the impact of prior-masked pixels, enables the creation of an optimal matched filtered product for point source detection, and most important, it allows for resolution enhancement (HiRes) to yield a model of the sky that is consistent with the observations to within measurement error. The HiRes functionality allows for non-isoplanatic PRFs, prior noise-variance weighting, uncertainty estimation, and includes a ringing-suppression algorithm. AWAIC also supports the popular overlap-area weighted interpolation method, and is generic enough for use on any astronomical image data that supports the FITS and WCS standards.

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Masci, Frank J.0000-0002-8532-9395
Additional Information:© 2009 Astronomical Society of the Pacific. The authors thank Roc Cutri for guidance and support. This work was carried out at the California Institute of Technology, with funding from the National Aeronautics and Space Administration, under contract to the Jet Propulsion Laboratory.
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Series Name:ASP Conference Series
Issue or Number:411
Record Number:CaltechAUTHORS:20100913-151444360
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19916
Deposited By: Tony Diaz
Deposited On:16 Sep 2010 22:23
Last Modified:03 Oct 2019 02:03

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