Astrometry and Photometry with HST WFC3. II. Improved Geometric-Distortion Corrections for 10 Filters of the UVIS Channel

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 f...

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Veröffentlicht in:Publications of the Astronomical Society of the Pacific 2011-05, Vol.123 (903), p.622-637
Hauptverfasser: BELLIN, A, ANDERSON, J, BEDIN, L. R
Format: Artikel
Sprache:eng
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Zusammenfassung: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 ( [approx]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.
ISSN:0004-6280
1538-3873
DOI:10.1086/659878