Journal
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
Volume 123, Issue 903, Pages 622-637Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/659878
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Funding
- Space Telescope Science Institute
- Ministero dell'Istruzione, dell'Universita e della Ricerca [20075TP5K9]
- NASA [NAS 5-26555]
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We present an improved geometric-distortion solution for the Hubble Space Telescope UVIS channel of Wide Field Camera 3 for 10 broadband filters. The solution is made up of three parts: (1) a third-order polynomial to deal with the general optical distortion, (2) a table of residuals that accounts for both chip-related anomalies and fine-structure introduced by the filter, and (3) a linear transformation to put the two chips into a convenient master frame. The final correction is better than 0.008 pixel (similar to 0.3 mas) in each coordinate. We provide the solution in two different forms: a FORTRAN subroutine and a set of FITS files, one for each filter/chip/coordinate.
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