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Ground layer adaptive optics for the W. M. Keck Observatory: feasibility study

Lu, J. R. and Chun, M. and Ammons, S. M. and Bundy, K. and Dekany, R. and Do, T. and Gavel, D. and Kassis, M. and Lai, O. and Martin, C. L. and Max, C. and Steidel, C. and Wang, L. and Westfall, K. and Wizinowich, P. (2018) Ground layer adaptive optics for the W. M. Keck Observatory: feasibility study. In: Adaptive Optics Systems VI. Proceedings of SPIE. No.10703. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 107030N. ISBN 9781510619593. http://resolver.caltech.edu/CaltechAUTHORS:20180712-125827165

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Abstract

Ground-layer adaptive optics (GLAO) systems offer the possibility of improving the ”seeing” of large ground-based telescopes and increasing the efficiency and sensitivity of observations over a wide field-of-view. We explore the utility and feasibility of deploying a GLAO system at the W. M. Keck Observatory in order to feed existing and future multi-object spectrographs and wide-field imagers. We also briefly summarize science cases spanning exoplanets to high-redshift galaxy evolution that would benefit from a Keck GLAO system. Initial simulations indicate that a Keck GLAO system would deliver a 1.5x and 2x improvement in FWHM at optical (500 nm) and infrared (1.5 μm), respectively. The infrared instrument, MOSFIRE, is ideally suited for a Keck GLAO feed in that it has excellent image quality and is on the telescope’s optical axis. However, it lacks an atmospheric dispersion compensator, which would limit the minimum usable slit size for long-exposure science cases. Similarly, while LRIS and DEIMOS may be able to accept a GLAO feed based on their internal image quality, they lack either an atmospheric dispersion compensator (DEIMOS) or flexure compensation (LRIS) to utilize narrower slits matched to the GLAO image quality. However, some science cases needing shorter exposures may still benefit from Keck GLAO and we will investigate the possibility of installing an ADC.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2314417DOIArticle
ORCID:
AuthorORCID
Lu, J. R.0000-0001-9611-0009
Steidel, C.0000-0002-4834-7260
Additional Information:© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). We acknowledge funding from the W. M. Keck Observatory and the University of California Observatories to support the development of a GLAO concept for the Keck telescopes.
Funders:
Funding AgencyGrant Number
W. M. Keck ObservatoryUNSPECIFIED
University of California ObservatoriesUNSPECIFIED
Subject Keywords:adaptive optics – ground layer
Record Number:CaltechAUTHORS:20180712-125827165
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180712-125827165
Official Citation:J. R. Lu, M. Chun, S. M. Ammons, K. Bundy, R. Dekany, T. Do, D. Gavel, M. Kassis, O. Lai, C. L. Martin, C. Max, C. Steideil, L. Wang, K. Westfall, P. Wizinowich, "Ground layer adaptive optics for the W. M. Keck Observatory: feasibility study", Proc. SPIE 10703, Adaptive Optics Systems VI, 107030N (10 July 2018); doi: 10.1117/12.2314417; https://doi.org/10.1117/12.2314417
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87805
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:13 Jul 2018 17:22
Last Modified:13 Jul 2018 17:22

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