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Proceedings Paper

Compensating for differential atmospheric refraction in the W.M. Keck Observatory adaptive optics system
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Paper Abstract

Differential Atmospheric Refraction (DAR) reduces image quality on ground-based 10-m telescopes equipped with Adaptive Optics (AO). Particularly affected are the long exposure data taken in narrow-band imaging or spectroscopic mode. The magnitude of the DAR is a function of the effective wavelength of the wavefront sensor detector, meteorological variables, the observing wavelength and the elevation of the observation. In this paper, we present the approach taken by the Keck Adaptive Optics team to compensate for DAR during AO observing. This paper will present a description and illustration of the problem and our solution to it, including some implementation details. This paper also presents some tips on observing techniques, along with some details on current performance, a description of the issues limiting the performance, and our plans for the future.

Paper Details

Date Published: 7 February 2003
PDF: 11 pages
Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); doi: 10.1117/12.459690
Show Author Affiliations
Paul J. Stomski, W.M. Keck Observatory (United States)
David Le Mignant, W.M. Keck Observatory (United States)
Peter L. Wizinowich, W.M. Keck Observatory (United States)
Randy D. Campbell, W.M. Keck Observatory (United States)
Robert Goodrich, W.M. Keck Observatory (United States)

Published in SPIE Proceedings Vol. 4839:
Adaptive Optical System Technologies II
Peter L. Wizinowich; Domenico Bonaccini, Editor(s)

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