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Proceedings Article

Performance of Subaru adaptive optics system AO188

[+] Author Affiliations
Yosuke Minowa, Yutaka Hayano, Shin Oya, Masayuki Hattori, Olivier Guyon, Sebastian Egner, Yoshihiko Saito, Meguro Ito, Hideki Takami, Vincent Garrel, Stephen Colley, Taras Golota

Subaru Telescope, National Astronomical Observatory of Japan (USA)

Makoto Watanabe

Hokkaido Univ. (Japan)

Masanori Iye

National Astronomical Observatory of Japan (Japan)

Proc. SPIE 7736, Adaptive Optics Systems II, 77363N (July 28, 2010); doi:10.1117/12.857818
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From Conference Volume 7736

  • Adaptive Optics Systems II
  • Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich
  • San Diego, California, USA | June 27, 2010

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 SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Yosuke Minowa ; Yutaka Hayano ; Shin Oya ; Makoto Watanabe ; Masayuki Hattori, et al.
"Performance of Subaru adaptive optics system AO188", Proc. SPIE 7736, Adaptive Optics Systems II, 77363N (July 28, 2010); doi:10.1117/12.857818; http://dx.doi.org/10.1117/12.857818


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