Open AccessThe W. M. Keck Observatory Laser Guide Star Adaptive Optics System: Performance Characterization
Author(s) -
Marcos A. van Dam,
Antonin H. Bouchez,
D. Le Mignant,
Erik M. Johansson,
Peter Wizinowich,
Randy Campbell,
Jason Chin,
Scott Hartman,
Robert Lafon,
Paul J. Stomski,
Douglas M. Summers
Publication year - 2006
Publication title -
publications of the astronomical society of the pacific
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.294
H-Index - 172
eISSN - 1538-3873
pISSN - 0004-6280
DOI - 10.1086/499498
Subject(s) - strehl ratio , adaptive optics , laser guide star , physics , stars , telescope , guide star , observatory , tilt (camera) , optics , deformable mirror , very large telescope , astrophysics , astronomy , mechanical engineering , engineering
The Keck II Telescope is the first 8-10 m class telescope equipped with a laser guide star adaptive optics (LGS AO) system. Under normal seeing conditions, the LGS AO system produces K-band Strehl ratios between 30% and 40% using bright tip-tilt guide stars, and it works well with tip-tilt guide stars as faint as , with partial correction for stars up to a magnitude fainter. This paper presents the algorithms implemented m p 18 R in the LGS AO system, as well as experimental performance results. A detailed error budget shows excellent agreement between the measured and expected image quality for both bright and faint guide stars.
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