7 July 2008 Precision astrometry with adaptive optics
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We discuss the limits of ground-based astrometry with adaptive optics based on experiments using the core of the Galactic globular cluster M5. We have recently achieved ⪅ 100microarcsecond astrometric precision and accuracy at the Hale 200-inch telescope. Here we apply the same experimental design considerations and optimal estimation technique to explore the astrometric precision of the Keck II telescope. We find that high-precision astrometry at ≈ 50 microarcsecond level is possible at Keck in 20 seconds. We discuss the potential of differential astrometry for current and next generation large aperture telescopes based on these results.
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P. B. Cameron, P. B. Cameron, M. C. Britton, M. C. Britton, S. R. Kulkarni, S. R. Kulkarni, } "Precision astrometry with adaptive optics", Proc. SPIE 7015, Adaptive Optics Systems, 70150A (7 July 2008); doi: 10.1117/12.789811; https://doi.org/10.1117/12.789811

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