Performance of Subaru adaptive optics system AO188
Performance of Subaru adaptive optics system AO188
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DOI：
10.1117/12.857818
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发表时间：
2010-07
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通讯作者：
Y. Minowa;Y. Hayano;S. Oya;Makoto Watanabe;M. Hattori;O. Guyon;S. Egner;Y. Saito;M. Ito;H. Takami;V. Garrel;S. Colley;T. Golota;M. Iye
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文献类型：
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作者：
Y. Minowa;Y. Hayano;S. Oya;Makoto Watanabe;M. Hattori;O. Guyon;S. Egner;Y. Saito;M. Ito;H. Takami;V. Garrel;S. Colley;T. Golota;M. Iye
斯巴鲁自适应光学系统 (AO188) 是一个 188 元件曲率传感器自适应光学系统，可在自然模式和激光导星模式下运行。 AO188安装在斯巴鲁望远镜的Nasmyth平台上，自2008年10月起在自然导星模式下成功运行。AO188在自然导星模式下的性能得到了红外相机和摄谱仪（IRCS）在天数据的良好验证。在正常视宁条件下，AO188 使用 R = 9.0 星等的自然导星实现了 60% 至 70% 的 K 波段斯特列尔比，并且它与低至 R = 16.5 星等的微弱导星配合良好。我们测量了球状星团中恒星图像的半高宽和斯特列尔比，发现等晕角约为30角秒。在本文中，我们概述了 AO188 的操作过程，以及其性能，如角分辨率、斯特列比和检测微弱物体的灵敏度增益。
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.