Subaru Prime Focus Camera — Suprime-Cam

By S. Miyazaki, Y. Komiyama, M. Sekiguchi, S. Okamura, M. Doi, H. Furusawa, M. Hamabe, K. Imi, Masahiki Kimura, F. Nakata and 5 more. 2002

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We have built an 80-mega pixels (10240 ×8192) mosaic CCD camera, called Suprime-Cam, for the wide-field prime focus of the 8.2m Subaru telescope. Suprime-Cam covers a field of view 34 � ×27 � , a unique facility among the 8-10m 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 ×15mm 3 ). 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 µm 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 ah alf, 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

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics

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In Astronomy and Astrophysics

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In Atomic and Molecular Physics, and Optics

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