Design and performance of the Keck angle tracker

S. L. Crawford; S. Ragland; A. Booth; M. M. Colavita; E. Hovland

doi:10.1117/12.672063

28 June 2006 Design and performance of the Keck angle tracker

S. L. Crawford, S. Ragland, A. Booth, M. M. Colavita, E. Hovland

Author Affiliations +

Proceedings Volume 6268, Advances in Stellar Interferometry; 62683W (2006) https://doi.org/10.1117/12.672063
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

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S. L. Crawford, S. Ragland, A. Booth, M. M. Colavita, and E. Hovland "Design and performance of the Keck angle tracker", Proc. SPIE 6268, Advances in Stellar Interferometry, 62683W (28 June 2006); https://doi.org/10.1117/12.672063

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