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        Fibre Multi-Object Spectrograph (FMOS) for the Subaru Telescope

        Author
        Kimura, Masahiko
        Maihara, Toshinori
        Iwamuro, Fumihide
        Akiyama, Masayuki
        Tamura, Naoyuki
        Dalton, Gavin B.
        Takato, Naruhisa
        Tait, Philip
        Ohta, Kouji
        Eto, Shigeru
        Mochida, Daisaku
        Elms, Brian
        Kawate, Kaori
        Kurakami, Tomio
        Moritani, Yuuki
        Noumaru, Junichi
        Ohshima, Norio
        Sumiyoshi, Masanao
        Yabe, Kiyoto
        Brzeski, Jurek
        Farrell, Tony
        Frost, Gabriella
        Gillingham, Peter R.
        Haynes, Roger
        Moore, Anna M.
        Muller, Rolf
        Smedley, Scott
        Smith, Greg
        Bonfield, David G.
        Brooks, Charles B.
        Holmes, Alan R.
        Lake, Emma Curtis
        Lee, Hanshin
        Lewis, Ian J.
        Froud, Tim R.
        Tosh, Ian A.
        Woodhouse, Guy F.
        Blackburn, Colin
        Content, Robert
        Dipper, Nigel
        Murray, Graham
        Sharples, Ray
        Robertson, David J.
        Attention
        2299/7286
        Abstract
        Fibre Multi-Object Spectrograph (FMOS) is the first near-infrared instrument with a wide field of view capable of acquiring spectra simultaneously from up to 400 objects. It has been developed as a common-use instrument for the F/2 prime-focus of the Subaru Telescope. The field coverage of 30' diameter is achieved using a new 3-element corrector optimized in the near-infrared (0.9-1.8 mu m) wavelength range. Due to limited space at the prime-focus, we have had to develop a novel fibre positioner, called "Echidna", together with two OH-airglow suppressed spectrographs. FMOS consists of three subsystems: the prime focus unit for IR, the fibre positioning system/connector units, and the two spectrographs. After full systems integration, FMOS was installed on the telescope in late 2007. Many aspects of the performance were checked through various test and engineering observations. In this paper, we present the optical and mechanical components of FMOS, and show the results of our on-sky engineering observations to date.
        Publication date
        2010
        Published in
        Publications of the Astronomical Society of Japan
        Other links
        http://hdl.handle.net/2299/7286
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