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Journal of Astronomical Telescopes, Instruments, and Systems • Open Access

Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph
Author(s): Hajime Sugai; Naoyuki Tamura; Hiroshi Karoji; Atsushi Shimono; Naruhisa Takato; Masahiko Kimura; Youichi Ohyama; Akitoshi Ueda; Hrand Aghazarian; Márcio de Arruda; Robert H. Barkhouser; Charles L. Bennett; Steve Bickerton; Alexandre Bozier; David F. Braun; Khanh Bui; Christopher M. Capocasale; Michael A. Carr; Bruno Castilho; Yin-Chang Chang; Hsin-Yo Chen; Chueh-Yi Chou; Olivia R. Dawson; Richard G. Dekany; Eric M. Ek; Richard S. Ellis; Robin J. English; Didier Ferrand; Décio Ferreira; Charles D. Fisher; Mirek Golebiowski; James E. Gunn; Murdock Hart; Timothy M. Heckman; Paul T. P. Ho; Stephen Hope; Larry E. Hovland; Shu-Fu Hsu; Yen-Shan Hu; Pin-Jie Huang; Marc Jaquet; Jennifer E. Karr; Jason G. Kempenaar; Matthew E. King; Olivier C. Le Fèvre; David Le Mignant; Hung-Hsu Ling; Craig Loomis; Robert H. Lupton; Fabrice Madec; Peter H. Mao; Lucas Souza Marrara; Brice Ménard; Chaz Morantz; Hitoshi Murayama; Graham J. Murray; Antonio Cesar de Oliveira; Claudia L. Mendes de Oliveira; Lígia Souza de Oliveira; Joseph D. Orndorff; Rodrigo M. P. de Paiva Vilaça; Eamon J. Partos; Sandrine Pascal; Thomas Pegot-Ogier; Daniel J. Reiley; Reed L. Riddle; Leandro Henrique dos Santos; Jesulino Bispo dos Santos; Mark A. Schwochert; Michael D. Seiffert; Stephen A. Smee; Roger M. Smith; Ronald E. Steinkraus; Laerte Sodré; David N. Spergel; Christian Surace; Laurence Tresse; Clément Vidal; Sébastien Vives; Shiang-Yu Wang; Chih-Yi Wen; Amy C. Wu; Rosemary Wyse; Chi-Hung Yan

Paper Abstract

The Prime Focus Spectrograph (PFS) is an optical/near-infrared multifiber spectrograph with 2394 science fibers distributed across a 1.3-deg diameter field of view at the Subaru 8.2-m telescope. The wide wavelength coverage from 0.38  μm to 1.26  μm, with a resolving power of 3000, simultaneously strengthens its ability to target three main survey programs: cosmology, galactic archaeology and galaxy/AGN evolution. A medium resolution mode with a resolving power of 5000 for 0.71  μm to 0.89  μm will also be available by simply exchanging dispersers. We highlight some of the technological aspects of the design. To transform the telescope focal ratio, a broad-band coated microlens is glued to each fiber tip. A higher transmission fiber is selected for the longest part of the cable system, optimizing overall throughput; a fiber with low focal ratio degradation is selected for the fiber-positioner and fiber-slit components, minimizing the effects of fiber movements and fiber bending. Fiber positioning will be performed by a positioner consisting of two stages of piezo-electric rotary motors. The positions of these motors are measured by taking an image of artificially back-illuminated fibers with the metrology camera located in the Cassegrain container; the fibers are placed in the proper location by iteratively measuring and then adjusting the positions of the motors. Target light reaches one of the four identical fast-Schmidt spectrograph modules, each with three arms. The PFS project has passed several project-wide design reviews and is now in the construction phase.

Paper Details

Date Published: 23 June 2015
PDF: 11 pages
J. Ast. Inst. Sys. 1(3) 035001 doi: 10.1117/1.JATIS.1.3.035001
Published in: Journal of Astronomical Telescopes, Instruments, and Systems Volume 1, Issue 3
Show Author Affiliations
Hajime Sugai, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Naoyuki Tamura, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Hiroshi Karoji, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Atsushi Shimono, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Naruhisa Takato, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Masahiko Kimura, Institute of Astronomy and Astrophysics - Academia Sinica (Taiwan)
Youichi Ohyama, Institute of Astronomy and Astrophysics - Academia Sinica (Taiwan)
Akitoshi Ueda, National Astronomical Observatory of Japan (Japan)
Hrand Aghazarian, Jet Propulsion Lab. (United States)
Márcio de Arruda, Lab. Nacional de Astrofísica (Brazil)
Robert H. Barkhouser, Johns Hopkins Univ. (United States)
Charles L. Bennett, Johns Hopkins Univ. (United States)
Steve Bickerton, Kavli Institute for the Physics and Mathematics of the Universe (Japan)
Alexandre Bozier, Lab. d'Astrophysique de Marseille (France)
David F. Braun, Jet Propulsion Lab. (United States)
Khanh Bui, California Institute of Technology (United States)
Christopher M. Capocasale, Jet Propulsion Lab. (United States)
Michael A. Carr, Princeton Univ. (United States)
Bruno Castilho, Lab. Nacional de Astrofísica (Brazil)
Yin-Chang Chang, Academia Sinica (Taiwan)
Hsin-Yo Chen, Academia Sinica (Taiwan)
Chueh-Yi Chou, Academia Sinica (Taiwan)
Olivia R. Dawson, Jet Propulsion Lab. (United States)
Richard G. Dekany, California Institute of Technology (United States)
Eric M. Ek, Jet Propulsion Lab. (United States)
Richard S. Ellis, California Institute of Technology (United States)
Robin J. English, Jet Propulsion Lab. (United States)
Didier Ferrand, Lab. d'Astrophysique de Marseille (France)
Décio Ferreira, Lab. Nacional de Astrofísica (Brazil)
Charles D. Fisher, Jet Propulsion Lab. (United States)
Mirek Golebiowski, Johns Hopkins Univ. (United States)
James E. Gunn, Princeton Univ. (United States)
Murdock Hart, Johns Hopkins Univ. (United States)
Timothy M. Heckman, Johns Hopkins Univ. (United States)
Paul T. P. Ho, Academia Sinica (Taiwan)
Stephen Hope, Johns Hopkins Univ. (United States)
Larry E. Hovland, Jet Propulsion Lab. (United States)
Shu-Fu Hsu, Institute of Astronomy and Astrophysics - Academia Sinica (Taiwan)
Yen-Shan Hu, Institute of Astronomy and Astrophysics - Academia Sinica (Taiwan)
Pin-Jie Huang, Institute of Astronomy and Astrophysics - Academia Sinica (Taiwan)
Marc Jaquet, Observatoire Astronomique de Marseille-Provence (France)
Jennifer E. Karr, Institute of Astronomy and Astrophysics - Academia Sinica (Taiwan)
Jason G. Kempenaar, Jet Propulsion Lab. (United States)
Matthew E. King, Jet Propulsion Lab. (United States)
Olivier C. Le Fèvre, Lab. d'Astrophysique de Marseille (France)
David Le Mignant, Lab. d'Astrophysique de Marseille (France)
Hung-Hsu Ling, Academia Sinica (Taiwan)
Craig Loomis, Princeton Univ. (United States)
Robert H. Lupton, Princeton Univ. (United States)
Fabrice Madec, Lab. d'Astrophysique de Marseille (France)
Peter H. Mao, California Institute of Technology (United States)
Lucas Souza Marrara, Lab. Nacional de Astrofísica (Brazil)
Brice Ménard, Johns Hopkins Univ. (United States)
Chaz Morantz, Jet Propulsion Lab. (United States)
Hitoshi Murayama, The Univ. of Tokyo (Japan)
Graham J. Murray, Durham Univ. (United Kingdom)
Antonio Cesar de Oliveira, Lab. Nacional de Astrofísica (Brazil)
Claudia L. Mendes de Oliveira, Univ. de São Paulo (Brazil)
Lígia Souza de Oliveira, Lab. Nacional de Astrofísica (Brazil)
Joseph D. Orndorff, Johns Hopkins Univ. (United States)
Rodrigo M. P. de Paiva Vilaça, Lab. Nacional de Astrofísica (Brazil)
Eamon J. Partos, Jet Propulsion Lab. (United States)
Sandrine Pascal, Lab. d'Astrophysique de Marseille (France)
Thomas Pegot-Ogier, Lab. d'Astrophysique de Marseille (France)
Daniel J. Reiley, California Institute of Technology (United States)
Reed L. Riddle, California Institute of Technology (United States)
Leandro Henrique dos Santos, Lab. Nacional de Astrofísica (Brazil)
Jesulino Bispo dos Santos, Lab. Nacional de Astrofísica (Brazil)
Mark A. Schwochert, Jet Propulsion Lab. (United States)
Michael D. Seiffert, Jet Propulsion Lab. (United States)
California Institute of Technology (United States)
Stephen A. Smee, Johns Hopkins Univ. (United States)
Roger M. Smith, California Institute of Technology (United States)
Ronald E. Steinkraus, Jet Propulsion Lab. (United States)
Laerte Sodré, Univ. de São Paulo (Brazil)
David N. Spergel, Princeton Univ. (United States)
Christian Surace, Lab. d'Astrophysique de Marseille (France)
Laurence Tresse, Lab. d'Astrophysique de Marseille (France)
Clément Vidal, Lab. d'Astrophysique de Marseille (France)
Sébastien Vives, Lab. d'Astrophysique de Marseille (France)
Shiang-Yu Wang, Academia Sinica (Taiwan)
Chih-Yi Wen, Academia Sinica (Taiwan)
Amy C. Wu, Jet Propulsion Lab. (United States)
Rosemary Wyse, Johns Hopkins Univ. (United States)
Chi-Hung Yan, Institute of Astronomy and Astrophysics - Academia Sinica (Taiwan)


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