Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph
Creators: name: Sugai, Hajime
name: Tamura, Naoyuki
name: Karoji, Hiroshi
name: Shimono, Atsushi
name: Takato, Naruhisa
name: Kimura, Masahiko
name: Ohyama, Youichi
name: Ueda, Akitoshi
name: Aghazarian, Hrand
name: de Arruda, Marcio Vital
name: Barkhouser, Robert H.
name: Bennett, Charles L.
name: Bickerton, Steve
name: Bozier, Alexandre
name: Braun, David F.
name: Bui, Khanh
name: Capocasale, Christopher M.
name: Carr, Michael A.
name: Castilho, Bruno
name: Chang, Yin-Chang
name: Chen, Hsin-Yo
name: Chou, Richard C. Y.
name: Dawson, Olivia R.
name: Dekany, Richard G.
name: Ek, Eric M.
name: Ellis, Richard S.
name: English, Robin J.
name: Ferrand, Didier
name: Ferreira, Décio
name: Fisher, Charles D.
name: Golebiowski, Mirek
name: Gunn, James E.
name: Hart, Murdock
name: Heckman, Timothy M.
name: Ho, Paul T. P.
name: Hope, Stephen
name: Hovland, Larry E.
name: Hsu, Shu-Fu
name: Hu, Yen-Shan
name: Huang, Pin Jie
name: Jaquet, Marc
name: Karr, Jennifer E.
name: Kempenaar, Jason G.
name: King, Matthew E.
name: Fèvre, Olivier Le
name: Mignant, David Le
name: Ling, Hung-Hsu
name: Loomis, Craig
name: Lupton, Robert H.
name: Madec, Fabrice
name: Mao, Peter
name: Marrara, Lucas Souza
name: Ménard, Brice
name: Morantz, Chaz
name: Murayama, Hitoshi
name: Murray, Graham J.
name: de Oliveira, Antonio Cesar
name: de Oliveira, Claudia Mendes
name: de Oliveira, Ligia Souza
name: Orndorff, Joe D.
name: Vilaça, Rodrigo de Paiva
name: Partos, Eamon J.
name: Pascal, Sandrine
name: Pegot-Ogier, Thomas
name: Reiley, Daniel J.
name: Riddle, Reed
name: Santos, Leandro
name: Santos, Jesulino Bispo dos
name: Schwochert, Mark A.
name: Seiffert, Michael D.
name: Smee, Stephen A.
name: Smith, Roger M.
name: Steinkraus, Ronald E.
name: Sodré, Laerte
name: Spergel, David N.
name: Surace, Christian
name: Tresse, Laurence
name: Vidal, Clément
name: Vives, Sebastien
name: Wang, Shiang-Yu
name: Wen, Chih-Yi
name: Wu, Amy C.
name: Wyse, Rosie
name: Yan, Chi-Hung
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: 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.
description: 19 pages, 11 figures