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Abstract Review
Corresponding Author |
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Authors |
Name | | Affiliation |
Matthew Britton |
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Caltech Optical Observatories
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Abstract |
Session | | 2 (Adaptive optics, interferometry, and other approaches to mitigate atmospheric optical turbulence.) |
Title | | 'The Anisoplanatic Point Spread Function in Adaptive Optics' |
Abstract | | In a classical adaptive optics system, anisoplanatism introduces a field dependent degradation in the point spread function (PSF). This degradation also evolves in time due to changes in the atmospheric turbulence profile. This talk presents the results of an experiment in which adaptive optics images of a 21" binary observed with the Palomar Adaptive Optics system on the Hale 5 m telescope and turbulence profile measurements from a DIMM/MASS unit were acquired contemporaneously. The measured turbulence profiles were used together with images of the primary to predict the evolution of the long exposure PSF of the secondary. These predictions were shown to agree with the observed images to a high degree of accuracy. These PSF predictions were then used to derive differential astrometry of the binary accurate to to 1 mas and differential photometry accurate to .1%.
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