Hyper Suprime-Cam: System design and verification of image quality
Hyper Suprime-Cam: System design and verification of image quality
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DOI：
10.1093/pasj/psx063
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发表时间：
2018-01-01
影响因子：
2.3
通讯作者：
Yokota, Hideo
中科院分区：
文献类型：
--
作者：
Miyazaki, Satoshi;Komiyama, Yutaka;Yokota, Hideo
Hyper Suprime-Cam（HSC）是一款8.2米斯巴鲁望远镜的8.7亿像素主焦点光学成像相机。宽视场校正器提供0。2（FWHM）。相机相对于主镜的光轴的准直是用六足致动器完成的，其机械精度为几微米。对离焦恒星像中剩余波前误差的分析表明，光学元件的准直满足设计要求。虽然机械部件存在弯曲，但也在设计规范范围内。因此，相机在大部分时间内都能在莫纳克亚岛上实现其有限的成像;几年的观测中值为0。在i波段为' 67（FWHM）。这些传感器使用200 μ m厚度（2048 x 4176 15 μ m平方像素）的p通道、完全耗尽CCD，我们使用其中116个来铺设50 cm直径的焦平面。曝光之间的最小间隔为34秒，包括读取阵列、将数据传输到控制计算机以及将其保存到硬盘驱动器的时间。斯巴鲁上的HSC独特地结合了大口径、宽视野、清晰图像和高灵敏度（尤其是在较长波长下），使其成为世界上最强大的观测设施之一。
The Hyper Suprime-Cam (HSC) is an 870 megapixel prime focus optical imaging camera for the 8.2 m Subaru telescope. The wide-field corrector delivers sharp images of 0.'' 2 (FWHM) in the HSC-i band over the entire 1.degrees 5 diameter field of view. The collimation of the camera with respect to the optical axis of the primary mirror is done with hexapod actuators, the mechanical accuracy of which is a few microns. Analysis of the remaining wavefront error in off-focus stellar images reveals that the collimation of the optical components meets design specifications. While there is a flexure of mechanical components, it also is within the design specification. As a result, the camera achieves its seeing-limited imaging on Maunakea during most of the time; the median seeing over several years of observing is 0.'' 67 (FWHM) in the i band. The sensors use p-channel, fully depleted CCDs of 200 mu m thickness (2048 x 4176 15 mu m square pixels) and we employ 116 of them to pave the 50 cm diameter focal plane. The minimum interval between exposures is 34 s, including the time to read out arrays, to transfer data to the control computer, and to save them to the hard drive. HSC on Subaru uniquely features a combination of a large aperture, a wide field of view, sharp images and a high sensitivity especially at longer wavelengths, which makes the HSC one of the most powerful observing facilities in the world.