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1. Prime Focus Spectrograph (PFS): the prime focus instrument

Author

Yen-Shan Hu, Masahiko Kimura, James E. Gunn, Antonio Cesar de Oliveira, Hassan Siddiqui, Richard C. Y. Chou, Shu-Fu Hsu, Yin-Chang Chang, Craig P. Loomis, Naoyuki Tamura, Hung-Hsu Ling, Jennifer L. Karr, Graham J. Murray, C.-Y. Wen, Yuki Moritani, Leandro Henrique dos Santos, Shiang-Yu Wang, Chi-Hung Yan, Hsin-Yo Chen, Décio Ferreira, Daniel J. Reiley, Ligia Souza de Oliveira, Naruhisa Takato, Mitsuko Roberts, Lucas Souza Marrara, Pin-Jie Huang, Robert H. Lupton, Evans, Christopher J., Bryant, Julia J., and Motohara, Kentaro

Subjects
Focus (computing), Scanner, Optics, Computer science, business.industry, Interface (computing), Special care, Subaru Telescope, Fiducial marker, business, Spectrograph, Prime (order theory)
Abstract

The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of the 8.2m Subaru telescope. PFS will cover 1.3 degrees diameter field with 2394 fibers to complement the imaging capability of Hyper SuprimeCam (HSC). The prime focus unit of PFS called Prime Focus Instrument (PFI) provides the interface with the top structure of Subaru telescope and also accommodates the optical bench in which Cobra fiber positioners and fiducial fibers are located. In addition, the acquisition and guiding cameras (AGCs), the cable wrapper, the fiducial fiber illuminator, and viewer, the field element, and the telemetry system are located inside the PFI. The mechanical structure of the PFI was designed with special care such that its deflections sufficiently match those of the HSC’s Wide Field Corrector (WFC) so the fibers will stay on targets over the course of the observations within the required accuracy. The delivery of PFI components started in 2017. After the verification of these components, the mechanical structure of the PFI is fully assembled in early 2019 and all Cobra positioners are integrated in summer 2020. A temperature controlled chamber with precise x-y scanner was setup for the verification of the fiber positioners. The testing of the target convergence performance of Cobra positioners is now in progress.

Published
2020

2. Prime Focus Spectrograph (PFS) for the Subaru telescope: ongoing integration and future plans

Author

Eiichiro Komatsu, David Le Mignant, Pierre Yves Chabaud, Yipeng Jing, Philippe Balard, Stephen A. Smee, Atsushi Shimono, Julien Rousselle, Sara Jamal, Yuki Moritani, Rudy Barette, Kjetil Dohlen, Naoyuki Tamura, Tomonori Tamura, Vincent Le Brun, David Hover, Yoshihiko Yamada, Michitoshi Yoshida, Fabrice Madec, Raphael Pourcelot, Shiang-Yu Wang, Youichi Ohyama, Yoko Tanaka, Lucas Souza Marrara, Eric Jeschke, Olivier Le Fèvre, Masahiko Kimura, M. Golebiowski, Masahiro Takada, Michael A. Carr, Ping Jie Huang, Robert H. Barkhouser, Josimar A. Rosa, Naoki Yasuda, Robert H. Lupton, Dmitry Medvedev, Chih Yi Wen, Albert Harding, Stephen C. Hope, Peter H. Mao, Micheal D. Seiffert, Masayuki Tanaka, Yin Chang Chang, Craig P. Loomis, Hiroshige Yoshida, Masato Onodera, Yukiko Kamata, Hisanori Furusawa, Aniruddha R. Thakar, Aaron J. Steinkraus, Matthew E. King, M. Jaquet, Chueh Yi Chou, Hassan Siddiqui, Arnaud Le Fur, Hung Hsu Ling, Murdock Hart, Guillaume Pernot, Neven Caplar, Mohamed Belhadi, Alain Schmitt, Erin Kado-Fong, Zuo Wang, Randolph Hammond, Chi-Hung Yan, You-Hua Chu, Antonio Cesar de Oliveira, Yen Shan Hu, Yosuke Minowa, Kiyoto Yabe, Michael A. Strauss, Richard S. Ellis, Paul T. P. Ho, Javier Garcia-Carpio, Jesulino Bispo dos Santos, Stéphane Arnouts, Josh Peebles, Mitsuko Roberts, Danilo Marchesini, Shu Fu Hsu, Richard Dekany, Orlando Verducci, D. Vibert, Maximilian Fabricius, Judith G. Cohen, Martin Reinecke, Leandro Henrique dos Santos, Christian Surace, Johannes Gross, Jill Burnham, Timothy M. Heckman, Daniel J. Reiley, Ligia Souza de Oliveira, Naruhisa Takato, Yuki Ishizuka, Sogo Mineo, Décio Ferreira, Jeniffer L. Karr, Hitoshi Murayama, Sandrine Pascal, Akitoshi Ueda, Philip J. Tait, Laerte Sodré, Hrand Aghazarian, Suzanne Werner, Graham J. Murray, Rodorigo P. De Almeida, Joe D. Orndorff, Michitaro Koike, M. Schwochert, James E. Gunn, Hsin Yo Chen, Beaussier, Catherine, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), UNIROUEN - UFR Santé (UNIROUEN UFR Santé), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU), Statens Serum Institut [Copenhagen], Evans, Christopher J., Simard, Luc, Takami, Hideki, and Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Focus (computing), [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Computer science, Field of view, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], 01 natural sciences, 7. Clean energy, Prime (order theory), 010309 optics, [SDU] Sciences of the Universe [physics], [SDU]Sciences of the Universe [physics], 0103 physical sciences, Systems engineering, Subaru Telescope, 010303 astronomy & astrophysics, Spectrograph, ComputingMilieux_MISCELLANEOUS
Abstract

PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is a very wide-field, massively multiplexed, optical and near-infrared spectrograph. Exploiting the Subaru prime focus, 2394 reconfigurable fibers will be distributed over the 1.3 deg field of view. The spectrograph has been designed with 3 arms of blue, red, and near-infrared cameras to simultaneously observe spectra from 380nm to 1260nm in one exposure at a resolution of ~ 1.6-2.7Å. An international collaboration is developing this instrument under the initiative of Kavli IPMU. The project recently started undertaking the commissioning process of a subsystem at the Subaru Telescope side, with the integration and test processes of the other subsystems ongoing in parallel. We are aiming to start engineering night-sky operations in 2019, and observations for scientific use in 2021. This article gives an overview of the instrument, current project status and future paths forward.

Published
2018

3. Prime Focus Spectrograph (PFS) for the Subaru Telescope: Overview, recent progress, and future perspectives

Author

Hitoshi Murayama, John D. Swinbank, Orlando Verducci, Claudia Mendes de Oliveira, Albert Harding, D. Vibert, Maximilian Fabricius, Larry E. Hovland, Olivier Le Fevre, Masashi Chiba, Daniel J. Reiley, Fabrice Madec, Vincent Le Brun, Atsushi Shimono, Randolph Hammond, Graham J. Murray, Sandrine Pascal, Joe D. Orndorff, Renato C. Borges, Christopher M. Hirata, Ligia Souza de Oliveira, C.-Y. Wen, Michael Seiffert, Gabriel Barban, Didier Ferrand, Richard C. Y. Chou, Murdock Hart, Kjetil Dohlen, Kiyoto Yabe, Robert H. Lupton, Marc Jaquet, Hrand Aghazarian, Hung-Hsu Ling, Mitsuko Roberts, Stéphane Arnouts, Richard Dekany, Chaz Morantz, Lucas Souza Marrara, Naoyuki Tamura, Stephen A. Smee, Yoko Tanaka, Pierre-Yves Chabaud, Timothy M. Heckman, Chi-Hung Yan, Yuki Ishizuka, Matthew E. King, Shiang-Yu Wang, Akitoshi Ueda, Johannes Gross, Mark A. Schwochert, Yasushi Suto, Philip J. Tait, David N. Spergel, Yen-Shan Hu, Masahiko Kimura, David F. Braun, Laurence Tresse, Rodrigo P. de Almeida, Youichi Ohyama, Judith G. Cohen, Mirek Golebiowski, Naoki Yasuda, Laerte Sodré, Hsin-Yo Chen, Shu-Fu Hsu, Martin Reinecke, Leandro Henrique dos Santos, Christian Surace, Andreas Ritter, Robert H. Barkhouser, Jefferson M. Pereira, Michael A. Strauss, Ping-Jie Huang, Antonio Cesar de Oliveira, Nao Suzuki, Arnaud Le Fur, Peter H. Mao, Yosuke Minowa, Aaron J. Steinkraus, Décio Ferreira, Clément Vidal, Michael A. Carr, You-Hua Chu, Yukiko Kamata, Yipeng Jing, James E. Gunn, Paul S. Ho, Stephen C. Hope, Jennifer L. Karr, Richard S. Ellis, Yin-Chang Chang, Yuki Moritani, Tomonori Tamura, Eiichiro Komatsu, Naruhisa Takato, Masahiro Takada, David Le Mignant, Jesulino Bispo dos Santos, Jenny E. Greene, Craig Loomis, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), SPIE, Christopher J. Evans, Luc Simard, Hideki Takami, Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Evans, Christopher J., Simard, Luc, and Takami, Hideki

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Computer science, Optical and near-infrared spectroscopy, Optical spectroscopy, FOS: Physical sciences, Field of view, 01 natural sciences, Prime (order theory), Spectral line, Near-infrared spectroscopy, 0103 physical sciences, Optical fibers, [INFO]Computer Science [cs], Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Spectrograph, Focus (computing), 010308 nuclear & particles physics, Multi-object spectroscopy, Astrophysics - Astrophysics of Galaxies, International collaboration, Future instruments, Astrophysics of Galaxies (astro-ph.GA), Systems engineering, Wide-field instrument, Subaru Telescope, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

PFS (Prime Focus Spectrograph), a next generation facility instrument on the 8.2-meter Subaru Telescope, is a very wide-field, massively multiplexed, optical and near-infrared spectrograph. Exploiting the Subaru prime focus, 2394 reconfigurable fibers will be distributed over the 1.3 deg field of view. The spectrograph has been designed with 3 arms of blue, red, and near-infrared cameras to simultaneously observe spectra from 380nm to 1260nm in one exposure at a resolution of ~1.6-2.7A. An international collaboration is developing this instrument under the initiative of Kavli IPMU. The project is now going into the construction phase aiming at undertaking system integration in 2017-2018 and subsequently carrying out engineering operations in 2018-2019. This article gives an overview of the instrument, current project status and future paths forward., 17 pages, 10 figures. Proceeding of SPIE Astronomical Telescopes and Instrumentation 2016

Published
2016
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4. The Current Status of Prime Focus Instrument of Subaru Prime Focus Spectrograph

Author

Antonio Cesar de Oliveira, Naoyuki Tamura, Daniel J. Reiley, Lucas Souza Marrara, Chi-Hung Yan, Ligia Souza de Oliveira, Pin-Jie Huang, Peter H. Mao, Masahiko Kimura, Yen-Sang Hu, Naruhisa Takato, Jennifer L. Karr, Atsushi Shimono, Graham J. Murray, Leandro Henrique dos Santos, Yin-Chang Chang, C.-Y. Wen, Décio Ferreira, Hung-Hsu Ling, Chaz Morantz, David F. Braun, Hsin-Yo Chen, Mark A. Schwochert, James E. Gunn, Shiang-Yu Wang, Richard C. Y. Chou, Evans, Christopher J., Simard, Luc, and Takami, Hideki

Subjects
Focus (computing), Optical fiber, Infrared, Computer science, business.industry, Interface (computing), FOS: Physical sciences, Prime (order theory), law.invention, Optics, law, business, Subaru Telescope, Astrophysics - Instrumentation and Methods for Astrophysics, Spectrograph, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph design for the prime focus of the 8.2m Subaru telescope. PFS will cover 1.3 degree diameter field with 2394 fibers to complement the imaging capability of Hyper SuprimeCam (HSC). The prime focus unit of PFS called Prime Focus Instrument (PFI) provides the interface with the top structure of Subaru telescope and also accommodates the optical bench in which Cobra fiber positioners are located. In addition, the acquisition and guiding cameras (AGCs), the optical fiber positioner system, the cable wrapper, the fiducial fibers, illuminator, and viewer, the field element, and the telemetry system are located inside the PFI. The mechanical structure of the PFI was designed with special care such that its deflections sufficiently match those of the HSC's Wide Field Corrector (WFC) so the fibers will stay on targets over the course of the observations within the required accuracy. In this report, the latest status of PFI development will be given including the performance of PFI components, the setup and performance of the integration and testing equipment., 9 pages, 8 figures, SPIE proceeding

Published
2016

5. Progress with the Prime Focus Spectrograph for the Subaru Telescope: a massively multiplexed optical and near-infrared fiber spectrograph

Author

Youichi Ohyama, Khanh Bui, Amy Wu, Rodrigo de Paiva Vilaça, Pin Jie Huang, Olivier Le Fèvre, Peter H. Mao, Eric M. Ek, Robert H. Barkhouser, David Le Mignant, Richard C. Y. Chou, Alexandre Bozier, Yin-Chang Chang, Craig P. Loomis, M. Jaquet, Sandrine Pascal, Décio Ferreira, Richard S. Ellis, Paul T. P. Ho, Richard Dekany, Hitoshi Murayama, Roger Smith, Naoyuki Tamura, Chaz Morantz, Olivia R. Dawson, Stephen A. Smee, Larry E. Hovland, Atsushi Shimono, Jason G. Kempenaar, Mark A. Schwochert, Reed Riddle, Timothy M. Heckman, Brice Ménard, Daniel J. Reiley, Charles Fisher, David N. Spergel, Ligia Souza de Oliveira, Masahiko Kimura, F. Madec, Mirek Golebiowski, Naruhisa Takato, Hajime Sugai, Thomas Pegot-Ogier, Leandro Henrique dos Santos, Rosie Wyse, Graham J. Murray, Lucas Souza Marrara, Hung-Hsu Ling, Antonio Cesar de Oliveira, Murdock Hart, Akitoshi Ueda, C.-Y. Wen, Christian Surace, Michael Seiffert, Robert H. Lupton, Laerte Sodré, Yen-Sang Hu, Shu-Fu Hsu, Hrand Aghazarian, S. Vives, Laurence Tresse, Michael A. Carr, Stephen C. Hope, Charles L. Bennett, James E. Gunn, Eamon J. Partos, Clément Vidal, Bruno Castilho, David F. Braun, Hsin-Yo Chen, Jennifer E. Karr, Jesulino Bispo dos Santos, Matthew E. King, Shiang-Yu Wang, Joe D. Orndorff, Didier Ferrand, Claudia Mendes de Oliveira, Hiroshi Karoji, Robin J. English, Steve Bickerton, Marcio Vital de Arruda, Ronald E. Steinkraus, Chi-Hung Yan, Christopher M. Capocasale, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Ramsay, Suzanne K., McLean, Ian S., and Takami, Hideki

Subjects
Physics, Microlens, business.industry, Near-infrared spectroscopy, Cassegrain reflector, FOS: Physical sciences, Field of view, law.invention, Telescope, Lens (optics), Optics, law, [INFO]Computer Science [cs], 14. Life underwater, business, Subaru Telescope, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Instrumentation and Methods for Astrophysics, Spectrograph, Instrumentation and Methods for Astrophysics (astro-ph.IM), ComputingMilieux_MISCELLANEOUS
Abstract

The Prime Focus Spectrograph (PFS) is an optical/near-infrared multi-fiber spectrograph with 2394 science fibers, which are distributed in 1.3 degree diameter field of view at Subaru 8.2-meter telescope. The simultaneous wide wavelength coverage from 0.38 um to 1.26 um, with the resolving power of 3000, strengthens its ability to target three main survey programs: cosmology, Galactic archaeology, and galaxy/AGN evolution. A medium resolution mode with resolving power of 5000 for 0.71 um to 0.89 um also will be available by simply exchanging dispersers. PFS takes the role for the spectroscopic part of the Subaru Measurement of Images and Redshifts project, while Hyper Suprime-Cam works on the imaging part. To transform the telescope plus WFC focal ratio, a 3-mm thick broad-band coated glass-molded microlens is glued to each fiber tip. A higher transmission fiber is selected for the longest part of cable system, while one with a better FRD performance is selected for the fiber-positioner and fiber-slit components, given the more frequent fiber movements and tightly curved structure. Each Fiber positioner consists of two stages of piezo-electric rotary motors. Its engineering model has been produced and tested. Fiber positioning will be performed iteratively by taking an image of artificially back-illuminated fibers with the Metrology camera located in the Cassegrain container. The camera is carefully designed so that fiber position measurements are unaffected by small amounts of high special-frequency inaccuracies in WFC lens surface shapes. Target light carried through the fiber system reaches one of four identical fast-Schmidt spectrograph modules, each with three arms. Prototype VPH gratings have been optically tested. CCD production is complete, with standard fully-depleted CCDs for red arms and more-challenging thinner fully-depleted CCDs with blue-optimized coating for blue arms., 14 pages, 12 figures, submitted to "Ground-based and Airborne Instrumentation for Astronomy V, Suzanne K. Ramsay, Ian S. McLean, Hideki Takami, Editors, Proc. SPIE 9147 (2014)"

Published
2014
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