First Successful Adaptive Optics PSF Reconstruction at W. M. Keck Observatory

We present the last results of our PSF reconstruction (PSF-R) project for the Keck-II and Gemini-North AO systems in natural guide star mode. Our initial tests have shown that the most critical aspects of PSF-R are the determination of the system static aberrations and the optical turbulence paramet...

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Bibliographic Details
Published in:arXiv.org 2012-02
Main Authors: Jolissaint, Laurent, Neyman, Chris, Christou, Julian, Wizinowich, Peter, Mugnier, Laurent
Format: Article
Language:English
Subjects:
Adaptive optics
Deformation
Formability
Phase diversity
Reconstruction
Online Access:Get full text
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Summary:We present the last results of our PSF reconstruction (PSF-R) project for the Keck-II and Gemini-North AO systems in natural guide star mode. Our initial tests have shown that the most critical aspects of PSF-R are the determination of the system static aberrations and the optical turbulence parameters, and we have set up a specific observation campaign on the two systems to explore this. We demonstrate that deformable mirror based seeing monitor works well, and 10% accuracy is easily obtained. Phase diversity has been demonstrated to work on sky sources. Besides, residual phase stationarity is an important assumption in PSF-R, and we demonstrate here that it is basically true. As a result of these tests and verifications, we have been able for the first time to obtain a very good PSF reconstruction for the Keck-II system, in bright natural guide star mode.
ISSN:2331-8422