@inproceedings{e2fa01d6baf5467294d735eada6feca3,
title = "Performance of Subaru adaptive optics system AO188",
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, St{\v r}ehl ration, and sensitivity gain for detecting faint objects.",
keywords = "Adaptive optics, Image quality, Strehl ratio, Telescope operation",
author = "Yosuke Minowa and Yutaka Hayano and Shin Oya and Makoto Watanabe and Masayuki Hattori and Olivier Guyon and Sebastian Egner and Yoshihiko Saito and Meguru Ito and Hideki Takami and Vincent Garrel and Stephen Colley and Taras Golota and Masanori Iye",
year = "2010",
doi = "10.1117/12.857818",
language = "English (US)",
isbn = "9780819482266",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
number = "PART 1",
booktitle = "Adaptive Optics Systems II",
edition = "PART 1",
note = "Adaptive Optics Systems II ; Conference date: 27-06-2010 Through 02-07-2010",
}