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Abstract We have built an 80-mega pixels (10240 8192) mosaic CCD camera, called Suprime-Cam, for the wide-field prime focus of the 8. 2 m Subaru telescope. Suprime-Cam covers a field of view 34' 27', a unique facility among the 8–10 m class telescopes, with a resolution of 0 {. ^ { }202} per pixel. The focal plane consists of ten high-resistivity 2k 4k CCDs developed by MIT Lincoln Laboratory, which are cooled by a large Stirling-cycle cooler. The CCD readout electronics was designed to be scalable, which allows the multiple read-out of tens of CCDs. It takes 50 seconds to readout entire arrays. We designed a filter-exchange mechanism of the jukebox type that can hold up to ten large filters (205 170 15 \, mm³). The wide-field corrector is basically a three-lens Wynne-type, but has a new type of atmospheric dispersion corrector. The corrector provides a flat focal plane and an un-vignetted field of view of 30' in diameter. The achieved co-planarity of the focal array mosaic is smaller than 30\, {m} peak-to-peak, which realizes mostly the seeing limited image over the entire field. The median seeing in the Ic-band, measured over one year and a half, is 0 {. ^ { }61}. The PSF anisotropy in Suprime-Cam images, estimated by stellar ellipticities, is about 2% under this median seeing condition. At the time of commissioning, Suprime-Cam had the largest survey speed, which is defined as the field of view multiplied by the primary mirror area of the telescope, among those cameras built for sub-arcsecond imaging.
Miyazaki et al. (Wed,) studied this question.