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Proceedings Paper

Design and performance of the Keck angle tracker
Author(s): S. L. Crawford; S. Ragland; A. Booth; M. M. Colavita; E. Hovland
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Paper Abstract

The Keck Angle Tracker (KAT) is a key subsystem in the NASA-funded Keck Interferometer at the Keck Observatory on the summit of Mauna Kea in Hawaii. KAT, which has been in operation since the achievement of first fringes in March 2001, senses the tilt of the stellar wavefront for each of the beams from the interferometer telescopes and provides tilt error signals to fast tip/tilt mirrors for high-bandwidth, wavefront tilt correction. In addition, KAT passes low-bandwidth, desaturation offsets to the adaptive optics system of the Keck telescopes to correct for slow pointing drifts. We present an overview of the instrument design and recent performance of KAT in support of the V2 science and nulling observing modes of the Keck Interferometer.

Paper Details

Date Published: 28 June 2006
PDF: 9 pages
Proc. SPIE 6268, Advances in Stellar Interferometry, 62683W (28 June 2006); doi: 10.1117/12.672063
Show Author Affiliations
S. L. Crawford, Jet Propulsion Lab. (United States)
S. Ragland, W.M. Keck Observatory (United States)
A. Booth, Jet Propulsion Lab. (United States)
M. M. Colavita, Jet Propulsion Lab. (United States)
E. Hovland, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 6268:
Advances in Stellar Interferometry
John D. Monnier; Markus Schöller; William C. Danchi, Editor(s)

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