Space Telescope Astrometry from CCD images |
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Authors: | Liang-Tai George Chiu |
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Institution: | (1) Yale University Observatory, 06520 New Haven, Connecticut |
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Abstract: | The astrometric application of the Wide Field Camera and the Planetary Camera is reviewed. It is shown that the digital image centering algorithms can yield a positional accuracy of 0.1 milli-arcsecond. Deconvolution of CCD's sensitivity, non-flatness of the filters, and crinkling of the CCD surface may limit the positional accuracy to 1 milli-arcsecond.Presented at the Symposium Star Catalogues, Positional Astronomy and Celestial Mechanics , held in honor of Paul Herget at the U.S. Naval Observatory, Washington, November 30, 1978. |
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