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28 July 2010 Performance of Subaru adaptive optics system AO188
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Abstract
Subaru adaptive optics system (AO188) is an 188-elements curvature sensor adaptive optics system that is operated in both natural and laser guide star modes. AO188 was installed at Nasmyth platform of the Subaru telescope and it has been successfully operating in the natural guide star mode since October 2008. The performance of AO188 in the natural guide star mode has been well verified from on-sky data obtained with the infrared camera and spectrograph (IRCS). Under normal seeing condition, AO188 achieves K-band Strehl ratio between 60% and 70% using R = 9.0 magnitude natural guide stars and it works well with faint guide stars down to R = 16.5 magnitude. We measured the FWHM and Strehl ratio of stellar images in globular clusters and found that the isoplanatic angle is approximately 30 arcsec. In this paper, we describe an overview of the operation procedure for AO188, as well as its performance such as angular resolution, Strehl ration, and sensitivity gain for detecting faint objects.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yosuke Minowa, Yutaka Hayano, Shin Oya, Makoto Watanabe, Masayuki Hattori, Olivier Guyon, Sebastian Egner, Yoshihiko Saito, Meguro Ito, Hideki Takami, Vincent Garrel, Stephen Colley, Taras Golota, and Masanori Iye "Performance of Subaru adaptive optics system AO188", Proc. SPIE 7736, Adaptive Optics Systems II, 77363N (28 July 2010); doi: 10.1117/12.857818; https://doi.org/10.1117/12.857818
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