Dr. Chi-Hung Yan Profile

Dr. Chi-Hung Yan

at Institute of Astronomy and Astrophysics Academia Sinica

SPIE Involvement:

Author

Publications (23)

Proceedings Article | 15 August 2024 Presentation + Paper

Presentation + Paper

Prime Focus Spectrograph (PFS) for Subaru Telescope: progressing final steps to science operation

Naoyuki Tamura, Kiyoto Yabe, Shintaro Koshida, Yuki Moritani, Masayuki Tanaka, Miho Ishigaki, Yuki Ishizuka, Yukiko Kamata, Ali Allaoui, Akira Arai, Stéphane Arnouts, Rudy Barette, Robert Barkhouser, Eddie Bergeron, Patrick Blanchard, Neven Caplar, Michael Carle, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Richard C. Chou, Judith Cohen, Ricardo Costa, Thibaut Crauchet, Rodorigo de Almeida, Antonio de Oliveira, Ligia de Oliveira, Kjetil Dohlen, Leandro dos Santos, László Dobos, Richard Ellis, Steve Ertel, Maximilian Fabricius, Décio Ferreira, Hisanori Furusawa, Wilfred Gee, Javier Garciá-Carpio, Roman Gerasimov, Mirek Golebiowski, Aidan Gray, James Gunn, ChangHoon Hahn, Satoshi Hamano, Randolph Hammond, Albert Harding, Takashi Hattori, Kota Hayashi, Wanqiu He, Timothy Heckman, Stephen Hope, Shu-Fu Hsu, Pin-Jie Huang, Marc Jaquet, Eric Jeschke, Christian Jespersen, Yipeng Jing, Russell Kackley, Jennifer Karr, Satoshi Kawanomoto, Masahiko Kimura, Evan Kirby, Michitaro Koike, Eiichiro Komatsu, Yusei Koyama, Vincent Le Brun, Arnaud Le Fur, David Le Mignant, Gerald Lemson, Yen-Ting Lin, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Danilo Marchesini, Lucas Marrara, Dmitry Medvedev, Sogo Mineo, Arik Mitschang, Satoshi Miyazaki, Kumiko Morihana, Takahiro Morishima, Hitoshi Murayama, Graham Murray, Sakurako Okamoto, Hirofumi Okita, Masato Onodera, Vera Passegger, Joshua Peebles, Paul Price, Tae-Soo Pyo, Lucio Ramos, Daniel Reiley, Martin Reinecke, Mitsuko Roberts, Josemar Rosa, Julien Rousselle, Kody Rubio, Kiaina Schubert, Michael Seiffert, Jared Siegel, Stephen Smee, Laerte Sodré, Michael Strauss, Tomomi Sunayama, Christian Surace, Masahiro Takada, Yuhei Takagi, Ichi Tanaka, Yoko Tanaka, Aniruddha Thakar, Didier Vibert, Shiang-Yu Wang, Chih-Yi Wen, Suzanne Werner, Matthew Wung, Chi-Hung Yan, Naoki Yasuda, Hiroshige Yoshida

Proceedings Volume 13096, 1309605 (2024) https://doi.org/10.1117/12.3015967

KEYWORDS: Telescopes, Equipment, Engineering, Cameras, Calibration, Observatories, Stars, Near infrared, Observational astronomy, Spectrographs

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The instrumentation of the Prime Focus Spectrograph (PFS), a next generation facility instrument on the Subaru telescope, is now in the final phase of its commissioning process and its general, open-use operations for sciences will provisionally start in 2025. The instrument enables simultaneous spectroscopy with 2386 individual fibers distributed over a very wide (∼1.3 degrees in diameter) field of view on the Subaru’s prime focus. The spectra cover a wide range of wavelengths from 380nm to 1260nm in one exposure in the Low-Resolution (LR) mode (while the visible red channel has the Medium-Resolution (MR) mode as well that covers 710−885nm). The system integration activities at the observatory on Maunakea in Hawaii have been continuing since the arrival of the Metrology Camera System in 2018. On-sky engineering tests and observations have also been carried out continually since September 2021 and, despite various difficulties in interlacing commissioning processes with development activities on the schedule and addressing some major issues on hardware and software, the team successfully observed many targeted stars as intended over the entire field of view (Engineering First Light) in September 2022. Then in parallel to the arrival, integration and commissioning of more hardware components, validations and optimizations of the performance and operation of the instrument are ongoing. The accuracy of the fiber positioning process and the speed of the fiber reconfiguration process have been recently confirmed to be ∼ 20−30μm for 95% of allocated fibers, and ∼130 seconds, respectively. While precise quantitative analyses are still in progress, the measured throughput has been confirmed to be consistent with the model where the information from various sub-components and sub-assemblies is integrated. Long integration of relatively faint objects are being taken to validate an expected increase of signal-to-noise ratio as more exposures are taken and co-added without any serious systematic errors from, e.g., sky subtraction process. The PFS science operation will be carried out in a queue mode by default and various developments, implementations and validations have been underway accordingly in parallel to the instrument commissioning activities. Meetings and sessions are arranged continually with the communities of potential PFS users on multiple scales, and discussions are iterated for mutual understanding and possible optimization of the rules and procedures over a wide range of processes such as proposal submission, observation planning, data acquisition and data delivery. The end-to-end processes of queue observations including successive exposures with updated plans based on assessed qualities of the data from past observations are being tested during engineering observations, and further optimizations are being undertaken. In this contribution, a top-level summary of these achievements and ongoing progresses and future perspectives will be provided.

Proceedings Article | 25 July 2024 Poster + Paper

Poster + Paper

Data reduction pipeline for the METIS integral field spectrograph

Martin Baláž, Oliver Czoske, Kieran Leschinski, Hugo Buddelmeijer, Gilles P. P. Otten, Jennifer Karr, Chi-Hung Yan, Wolfgang Kausch

Proceedings Volume 13101, 1310125 (2024) https://doi.org/10.1117/12.3017108

KEYWORDS: Data modeling, Sensors, Spectrographs, Matrices, Calibration, Image restoration, Reconstruction algorithms, Imaging systems, Image resolution

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Proceedings Article | 25 July 2024 Paper

Paper

Implementation plans for the data reduction pipeline for METIS at the ELT

Kieran Leschinski, Hugo Buddelmeijer, Oliver Czoske, Gilles Otten, Martin Balaz, Fabian Haberhauer, Jennifer Karr, Wolfgang Kausch, Thomas Marquart, Nadeen Sabha, Chi-Hung Yan, Norbert Przybilla, Shiang-Yu Wang, Werner Zeilinger

Proceedings Volume 13101, 131010W (2024) https://doi.org/10.1117/12.3020397

KEYWORDS: Equipment, Software development, Design, Sensors, Matrices, Astronomy, Quality control, Observational astronomy, Imaging spectroscopy, Device simulation

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Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

Prime Focus Spectrograph (PFS) for Subaru Telescope: the optimization of convergence for Cobra positioners

Shiang-Yu Wang, Chi-Hung Yan, Jennifer Karr, Richard C. Chou, Shu-Fu Hsu, James Gunn, Craig Loomis, Robert Lupton, Arnaud Le Fur, Yuki Moritani, Julien Rousselle, Shintaro Koshida, Kumiko Morihana, Satoshi Kawanomoto, Hiroshige Yoshida, Naoyuki Tamura

Proceedings Volume 13096, 130962N (2024) https://doi.org/10.1117/12.3016931

KEYWORDS: Cameras, Telescopes, Spectrographs, Fiber science, Calibration, Engineering, Observatories, Astronomy

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Prime Focus Spectrograph (PFS) for the Subaru Telescope: its start of the last development phase

Naoyuki Tamura, Yuki Moritani, Kiyoto Yabe, Yuki Ishizuka, Yukiko Kamata, Ali Allaoui, Akira Arai, Stéphane Arnouts, Robert Barkhouser, Rudy Barette, Patrick Blanchard, Eddie Bergeron, Neven Caplar, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Chueh-Yi Chou, You-Hua Chu, Judith Cohen, Richardo da Costa, Thibaut Crauchet, Rodrigo de Almeida, Antonio de Oliveira, Ligia de Oliveira, Kjetil Dohlen, Leandro dos Santos, Richard Ellis, Maximilian Fabricius, Décio Ferreira, Hisanori Furusawa, Jahmour Givans, Javier Garciá-Carpio, Mirek Golebiowski, Aidan Gray, James Gunn, Satoshi Hamano, Randolph Hammond, Albert Harding, Kota Hayashi, Wanqiu He, Timothy Heckman, Stephen Hope, Shu-Fu Hsu, Yen-Shan Hu, Pin Jie Huang, Miho Ishigaki, Eric Jeschke, Yipeng Jing, Erin Kado-Fong, Jennifer Karr, Satoshi Kawanomoto, Masahiko Kimura, Michitaro Koike, Eiichiro Komatsu, Shintaro Koshida, Vincent Le Brun, Arnaud Le Fur, David Le Mignant, Romain Lhoussaine, Yen-Ting Lin, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Danilo Marchesini, Edouard Marguerite, Lucas Marrara, Dmitry Medvedev, Sogo Mineo, Satoshi Miyazaki, Takahiro Morishima, Kazumi Murata, Hitoshi Murayama, Graham Murray, Hirofumi Okita, Masato Onodera, Joshua Peebles, Paul Price, Tae-Soo Pyo, Lucio Ramos, Daniel Reiley, Martin Reinecke, Mitsuko Roberts, Josimar Rosa, Julien Rousselle, Mira Sarkis, Michael Seiffert, Kiaina Schubert, Hassan Siddiqui, Stephen Smee, Laerte Sodré, Michael Strauss, Christian Surace, Manuchehr Taghizadeh Popp, Philip Tait, Masahiro Takada, Yuhei Takagi, Masayuki Tanaka, Yoko Tanaka, Aniruddha Thakar, Didier Vibert, Shiang-Yu Wang, Chih-Yi Wen, Suzanne Werner, Matthew Wung, Gerald Lemson, Arik Mitschang, Naoki Yasuda, Hiroshige Yoshida, Chi-Hung Yan, Michitoshi Yoshida, Takuji Yamashita

Proceedings Volume 12184, 1218410 (2022) https://doi.org/10.1117/12.2628152

KEYWORDS: Telescopes, Cameras, Spectrographs, Optical fibers, Observatories, Sensors, Astronomy, Software development, Near infrared, Connectors

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

Prime focus spectrograph (PFS) for the Subaru Telescope: the prime focus instrument

Shiang-Yu Wang, Masahiko Kimura, Chi-Hung Yan, Yin-Chang Chang, Shu-Fu Hsu, Jennifer Karr, Hsin-Yo Chen, Pin-Jie Huang, Chih-Yi Wen, Richard C. Y. Chou, Hung-Hsu Ling, Naoyuki Tamura, Yuki Moritani, Julien Rousselle, Hiroshige Yoshida, Shintaro Koshida, Naruhisa Takato, Dan Reiley, Mitsuko Roberts, James Gunn, Craig Loomis, Robert Lupton, Neven Caplar, Hassan Siddiqui, Décio Ferreira, Leandro Henrique dos Santos, Ligia Souza Oliveira, Antonio Cesar de Oliveira, Lucas Souza Marrara, Maximilian Fabricius, Graham Murray

Proceedings Volume 12184, 121846R (2022) https://doi.org/10.1117/12.2629098

KEYWORDS: Calibration, Telescopes, Optical fibers, Spectrographs, Cameras, Control systems, Astronomy, Signal processing, Glasses, Electronics

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Proceedings Article | 10 March 2021 Presentation + Paper

Presentation + Paper

Prime Focus Spectrograph (PFS) for the Subaru telescope: a next-generation facility instrument of the Subaru telescope has started coming

Naoyuki Tamura, Naruhisa Takato, Yuki Moritani, Kiyoto Yabe, Yuki Ishizuka, Yukiko Kamata, Ali Allaoui, Stéphane Arnouts, Robert Barkhouser, Philippe Balard, Rudy Barette, Mohamed Belhadi, Jill Burnham, Neven Caplar, Michael Carr, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Richard Chou, You-Hua Chu, Judith Cohen, Ricardo Costa, Thibaut Crauchet, Rodrigo de Almeida, Antonio de Oliveira, Ligia de Oliveira, Kjetil Dohlen, Leandro dos Santos, Richard Ellis, Maximilian Fabricius, Décio Ferreira, Hisanori Furusawa, Javier Garcia-Carpio, Mirek Golebiowski, Aidan Gray, James Gunn, Albert Harding, Randolph Hammond, Murdock Hart, Timothy Heckman, Stephen Hope, Shu-Fu Hsu, Yen-Sang Hu, Pin-Jie Huang, Marc Jaquet, Eric Jeschke, Yipeng Jing, Erin Kado-Fong, Jennifer Karr, Satoshi Kawanomoto, Masahiko Kimura, Michitaro Koike, Eiichiro Komatsu, Shintaro Koshida, Vincent Le Brun, Olivier Le Fèvre, Arnaud Le Fur, David Le Mignant, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Danilo Marchesini, Edouard Marguerite, Lucas Marrara, Dmitry Medvedev, Sogo Mineo, Hitoshi Murayama, Graham Murray, Youichi Ohyama, Hirofumi Okita, Yuki Okura, Masato Onodera, Joseph Orndorff, Sandrine Pascal, Joshua Peebles, Lucio Ramos, Daniel Reiley, Martin Reinecke, Mitsuko Roberts, Josimar Rosa, Julien Rousselle, Mira Sarkis, Alain Schmitt, Michael Seiffert, Kiaina Schubert, Hassan Siddiqui, Stephen Smee, Laerte Sodré, Michael Strauss, Christian Surace, Manuchehr Taghizadeh-Popp, Philip Tait, Masahiro Takada, Satoshi Takita, Tomonori Tamura, Masayuki Tanaka, Yoko Tanaka, Aniruddha Thakar, Didier Vibert, Shiang-Yu Wang, Chih-Yi Wen, Suzanne Werner, Matthew Wung, Yoshihiko Yamada, Takuji Yamashita, Chi-Hung Yan, Naoki Yasuda, Hiroshige Yoshida, Michitoshi Yoshida

Proceedings Volume 11447, 1144713 (2021) https://doi.org/10.1117/12.2562206

KEYWORDS: Spectrographs, Telescopes, Cameras, Imaging systems, Multiplexing, Optical fibers, Hardware testing, Metrology, Observatories, Visible radiation

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Proceedings Article | 15 December 2020 Presentation

Presentation

Prime Focus Spectrograph (PFS): Fiber assignment through min-cost/max-flow

Maximilian Fabricius, Ralf Bender, Javier Gracia-Carpio, Johannes Gross, Jim Gunn, Eiichiro Komatsu, Robert Lupton, Peter Mao, Martin Reinecke, Naoyuki Tamura, Robert Vanderbei, Shiang-Yu Wang, Kiyoto Yabe, Chi-Hung Yan

Proceedings Volume 11449, 114490P (2020) https://doi.org/10.1117/12.2560933

KEYWORDS: Spectrographs, Computer programming, Galaxy evolution, Detection and tracking algorithms, Calibration, Optical simulations, Astronomy

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Prime Focus Spectrograph (PFS): the metrology camera system

Shiang-Yu Wang, Chueh-Yi Chou, Yin-Chang Chang, Pin-Jie Huang, Jennifer Karr, Chi-Hung Yan, James Gunn, Craig Loomis, Robert Lupton, Hassan Siddiqui, Shu-Fu Hsu, Yen-Shan Hu, Daniel Reiley, Naoyuki Tamura, Yuki Moritani, Naruhisa Takato

Proceedings Volume 11447, 1144784 (2020) https://doi.org/10.1117/12.2561191

KEYWORDS: Spectrographs, Metrology, Cameras, Imaging systems, Optical fibers, Telescopes, Optical instrument design, Optical design, CMOS sensors, Point spread functions

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Prime Focus Spectrograph (PFS): the prime focus instrument

Shiang-Yu Wang, Pin-Jie Huang, Hsin-Yo Chen, Masahiko Kimura, Chih-Yi Wen, Chi-Hung Yan, Jennifer Karr, Richard C. Y. Chou, Yin-Chang Chang, Shu-Fu Hsu, Yen-Shan Hu, Hung-Hsu Ling, Dan Reiley, Mitsuko Roberts, James Gunn, Craig Loomis, Robert Lupton, Hassan Siddiqui, Graham Murray, Decio Ferreira, Leandro Henrique dos Santos, Ligia Souza Oliveira, Antonio Cesar de Oliveira, Lucas Souza Marrara, Naoyuki Tamura, Yuki Moritani, Naruhisa Takato

Proceedings Volume 11447, 114477V (2020) https://doi.org/10.1117/12.2561194

KEYWORDS: Spectrographs, Optical fibers, Telescopes, Optical instrument design, Optical design, Content addressable memory, Interfaces, Optical benches, Cameras, Fiber optic illuminators

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Proceedings Article | 27 July 2018 Presentation + Paper

Presentation + Paper

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

Naoyuki Tamura, Naruhisa Takato, Atsushi Shimono, Yuki Moritani, Kiyoto Yabe, Yuki Ishizuka, Yukiko Kamata, Akitoshi Ueda, Hrand Aghazarian, Stephané Arnouts, Robert Barkhouser, Philippe Balard, Rudy Barette, Mohamed Belhadi, Jill Burnham, Neven Caplar, Michael Carr, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Chueh-Yi Chou, You-Hua Chu, Judith Cohen, Rodorigo de Almeida, Antonio de Oliveira, Lígia de Oliveira, Richard Dekany, Kjetil Dohlen, Jesulino dos Santos, Leandro dos Santos, Richard Ellis, Maximilian Fabricius, Decio Ferreira, Hisanori Furusawa, Javier Garcia-Carpio, Mirek Golebiowski, Johannes Gross, James Gunn, Randolph Hammond, Albert Harding, Murdock Hart, Timothy Heckman, Paul Ho, Stephen Hope, David Hover, Shu-Fu Hsu, Yen-Shan Hu, Ping-Jie Huang, Sara Jamal, Marc Jaquet, Eric Jeschke, Yipeng Jing, Erin Kado-Fong, Jeniffer Karr, Masahiko Kimura, Matthew King, Michitaro Koike, Eiichiro Komatsu, Vincent Le Brun, Olivier Le Fèvre, Arnaud Le Fur, David Le Mignant, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Peter Mao, Danilo Marchesini, Lucas Marrara, Dmitry Medvedev, Sogo Mineo, Yosuke Minowa, Hitoshi Murayama, Graham Murray, Youichi Ohyama, Masato Onodera, Joseph Orndorff, Sandrine Pascal, Josh Peebles, Guillaume Pernot, Raphael Pourcelot, Daniel Reiley, Martin Reinecke, Mitsuko Roberts, Josimar Rosa, Julien Rousselle, Alain Schmitt, Mark Schwochert, Micheal Seiffert, Hassan Siddiqui, Stephen Smee, Laerte Sodré, Aaron Steinkraus, Michael Strauss, Christian Surace, Philip Tait, Masahiro Takada, Tomonori Tamura, Masayuki Tanaka, Yoko Tanaka, Aniruddha Thakar, Orlando Verducci, Didier Vibert, Shiang-Yu Wang, Zuo Wang, Chih-Yi Wen, Suzanne Werner, Yoshihiko Yamada, Chi-Hung Yan, Naoki Yasuda, Hiroshige Yoshida, Michitoshi Yoshida

Proceedings Volume 10702, 107021C (2018) https://doi.org/10.1117/12.2311871

KEYWORDS: Telescopes, Spectrographs, Optical fibers, Astronomy, Observatories, Cameras, Imaging systems, Astronomical telescopes, Physics, Prototyping

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Proceedings Article | 9 July 2018 Paper

Paper

Metrology camera system of prime focus spectrograph for Subaru telescope

Shiang-Yu Wang, Richard C. Y. Chou, Pin-Jie Huang, Yin-Chang Chang, Hung-Hsu Ling, Chi-Hung Yan, Jennifer Karr, Shu-Fu Hsu, Hsin-Yo Chen, Yen-Shan Hu, James Gunn, Dan Reiley, Naoyuki Tamura, Naruhisa Takato, Yuki Moritani, Atsushi Shimono

Proceedings Volume 10702, 107027H (2018) https://doi.org/10.1117/12.2311902

KEYWORDS: Optical fibers, Cameras, Telescopes, Metrology, Point spread functions, Control systems, Image quality, Camera shutters, Light emitting diodes, Spectrographs

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Proceedings Article | 6 July 2018 Paper

Paper

On-sky results with the fast guiding system on the SPIRou spectroplarimeter at CFHT

Greg Barrick, Jean-Francois Donati, Sébastien Baratchart, Claire Moutou, Tom Vermeulen, Kevin Ho, Marie Larrieu, Laurent Parès, Michel Dupieux, Shiang-Yu Wang, Chi-Hung Yan

Proceedings Volume 10702, 1070268 (2018) https://doi.org/10.1117/12.2312317

KEYWORDS: Stars, Telescopes, Mirrors, Sensors, Spectrographs, Cameras, Reflectivity, Clouds, Control systems, Polarization

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Proceedings Article | 6 July 2018 Paper

Paper

Software development of fiber positioning sequencer for prime focus spectrograph of Subaru telescope

Chi-Hung Yan, Chih-Yi Wen, Jennifer Karr, Shiang-Yu Wang, Johannes Gross, Hrand Aghazarian, Naoyuki Tamura, Atsushi Shimono, Craig Loomis, Robert Lupton

Proceedings Volume 10707, 1070728 (2018) https://doi.org/10.1117/12.2312348

KEYWORDS: Control systems, Telescopes, Signal to noise ratio, Spectrographs, Databases, Cameras, Point spread functions, Software development, Imaging systems, Detection and tracking algorithms

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Proceedings Article | 9 August 2016 Paper

Paper

Prime Focus Spectrograph (PFS) for the Subaru telescope: overview, recent progress, and future perspectives

Naoyuki Tamura, Naruhisa Takato, Atsushi Shimono, Yuki Moritani, Kiyoto Yabe, Yuki Ishizuka, Akitoshi Ueda, Yukiko Kamata, Hrand Aghazarian, Stéphane Arnouts, Gabriel Barban, Robert Barkhouser, Renato Borges, David Braun, Michael Carr, Pierre-Yves Chabaud, Yin-Chang Chang, Hsin-Yo Chen, Masashi Chiba, Richard C. Chou, You-Hua Chu, Judith Cohen, Rodrigo de Almeida, Antonio de Oliveira, Ligia S. de Oliveira, Richard Dekany, Kjetil Dohlen, Jesulino dos Santos, Leandro dos Santos, Richard Ellis, Maximilian Fabricius, Didier Ferrand, Décio Ferreira, Mirek Golebiowski, Jenny Greene, Johannes Gross, James Gunn, Randolph Hammond, Albert Harding, Murdock Hart, Timothy Heckman, Christopher Hirata, Paul Ho, Stephen Hope, Larry Hovland, Shu-Fu Hsu, Yen-Shan Hu, Ping-Jie Huang, Marc Jaquet, Yipeng Jing, Jennifer Karr, Masahiko Kimura, Matthew King, Eiichiro Komatsu, Vincent Le Brun, Olivier Le Fèvre, Arnaud Le Fur, David Le Mignant, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Peter Mao, Lucas Marrara, Claudia Mendes de Oliveira, Yosuke Minowa, Chaz Morantz, Hitoshi Murayama, Graham Murray, Youichi Ohyama, Joseph Orndorff, Sandrine Pascal, Jefferson Pereira, Daniel Reiley, Martin Reinecke, Andreas Ritter, Mitsuko Roberts, Mark Schwochert, Michael Seiffert, Stephen Smee, Laerte Sodre, David Spergel, Aaron Steinkraus, Michael Strauss, Christian Surace, Yasushi Suto, Nao Suzuki, John Swinbank, Philip Tait, Masahiro Takada, Tomonori Tamura, Yoko Tanaka, Laurence Tresse, Orlando Verducci, Didier Vibert, Clement Vidal, Shiang-Yu Wang, Chih-Yi Wen, Chi-Hung Yan, Naoki Yasuda

Proceedings Volume 9908, 99081M (2016) https://doi.org/10.1117/12.2232103

KEYWORDS: Telescopes, Spectrographs, Imaging systems, Cameras, Observatories, Calibration, Astronomy, Stars, Sensors, Galactic astronomy

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Proceedings Article | 9 August 2016 Paper

Paper

The current status of prime focus instrument of Subaru prime focus spectrograph

Shiang-Yu Wang, Mark Schwochert, Pin-Jie Huang, Hsin-Yo Chen, Masahiko Kimura, Richard C. Y. Chou, Yin-Chang Chang, Yen-Sang Hu, Hung-Hsu Ling, Chaz Morantz, Dan Reiley, Peter Mao, David Braun, Chih-Yi Wen, Chi-Hung Yan, Jennifer Karr, James Gunn, Graham Murray, Naoyuki Tamura, Naruhisa Takato, Atsushi Shimono, Decio Ferreira, Leandro Henrique dos Santos, Ligia Souza Oliveira, Antonio Cesar de Oliveira, Lucas Souza Marrara

Proceedings Volume 9908, 990882 (2016) https://doi.org/10.1117/12.2232044

KEYWORDS: Space telescopes, Telescopes, Calibration, Temperature metrology, Cameras, Optical fibers, Spectrographs, Sensors, Glasses, Charge-coupled devices

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SPIE Journal Paper | 23 June 2015 Open Access

Open Access

Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph

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

JATIS, Vol. 1, Issue 03, 035001, (June 2015) https://doi.org/10.1117/12.10.1117/1.JATIS.1.3.035001

KEYWORDS: Spectrographs, Telescopes, Cameras, Metrology, Microlens, Connectors, Astronomical telescopes, Sensors, Fiber science, Spectral resolution

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Proceedings Article | 24 July 2014 Paper

Paper

Metrology camera system of prime focus spectrograph for Subaru telescope

Shiang-Yu Wang, Chueh-Yi Chou, Yin-Chang Chang, Pin-Jie Huang, Yen-Sang Hu, Hsin-Yo Chen, Naoyuki Tamura, Naruhisa Takato, Hung-Hsu Ling, James Gunn, Jennifer Karr, Chi-Hung Yan, Peter Mao, Youichi Ohyama, Hiroshi Karoji, Hajime Sugai, Atsushi Shimono

Proceedings Volume 9147, 91475S (2014) https://doi.org/10.1117/12.2055787

KEYWORDS: Cameras, Metrology, Telescopes, Image processing, CMOS sensors, Error analysis, Sensors, Imaging systems, Spectrographs, Mirrors

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Proceedings Article | 8 July 2014 Paper

Paper

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

Hajime Sugai, Naoyuki Tamura, Hiroshi Karoji, Atsushi Shimono, Naruhisa Takato, Masahiko Kimura, Youichi Ohyama, Akitoshi Ueda, Hrand Aghazarian, Marcio de Arruda, Robert Barkhouser, Charles Bennett, Steve Bickerton, Alexandre Bozier, David Braun, Khanh Bui, Christopher Capocasale, Michael Carr, Bruno Castilho, Yin-Chang Chang, Hsin-Yo Chen, Richard Chou, Olivia Dawson, Richard Dekany, Eric Ek, Richard Ellis, Robin English, Didier Ferrand, Décio Ferreira, Charles Fisher, Mirek Golebiowski, James Gunn, Murdock Hart, Timothy Heckman, Paul Ho, Stephen Hope, Larry Hovland, Shu-Fu Hsu, Yen-Sang Hu, Pin Jie Huang, Marc Jaquet, Jennifer Karr, Jason Kempenaar, Matthew King, Olivier Le Fèvre, David Le Mignant, Hung-Hsu Ling, Craig Loomis, Robert Lupton, Fabrice Madec, Peter Mao, Lucas Marrara, Brice Ménard, Chaz Morantz, Hitoshi Murayama, Graham Murray, Antonio Cesar de Oliveira, Claudia de Oliveira, Ligia de Oliveira, Joe Orndorff, Rodrigo de Paiva Vilaça, Eamon Partos, Sandrine Pascal, Thomas Pegot-Ogier, Daniel Reiley, Reed Riddle, Leandro Santos, Jesulino dos Santos, Mark Schwochert, Michael Seiffert, Stephen Smee, Roger Smith, Ronald Steinkraus, Laerte Sodré, David Spergel, Christian Surace, Laurence Tresse, Clément Vidal, Sebastien Vives, Shiang-Yu Wang, Chih-Yi Wen, Amy Wu, Rosie Wyse, Chi-Hung Yan

Proceedings Volume 9147, 91470T (2014) https://doi.org/10.1117/12.2054294

KEYWORDS: Spectrographs, Telescopes, Cameras, Microlens, Metrology, Structured optical fibers, Connectors, Charge-coupled devices, Sensors, Image quality

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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 μm to 1.26 μm, 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 μm to 0.89 μm also will be available by simply exchanging dispersers. PFS takes the role for the spectroscopic part of the Subaru Measurement of Images and Redshifts (SuMIRe) project, while Hyper Suprime-Cam (HSC) works on the imaging part. HSC’s excellent image qualities have proven the high quality of the Wide Field Corrector (WFC), which PFS shares with HSC. The PFS collaboration has succeeded in the project Preliminary Design Review and is now in a phase of subsystem Critical Design Reviews and construction. To transform the telescope plus WFC focal ratio, a 3-mm thick broad-band coated microlens is glued to each fiber tip. The microlenses are molded glass, providing uniform lens dimensions and a variety of refractive-index selection. After successful production of mechanical and optical samples, mass production is now complete. Following careful investigations including Focal Ratio Degradation (FRD) measurements, 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. After evaluating the statistics of positioning accuracies, collision avoidance software, and interferences (if any) within/between electronics boards, mass production will commence. 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. All optical glass blanks are now being polished. 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. The active damping system against cooler vibration has been proven to work as predicted, and spectrographs have been designed to avoid small possible residual resonances.

Proceedings Article | 24 September 2012 Paper

Paper

SPIRou @ CFHT: design of the instrument control system

Gregory Barrick, Tom Vermeulen, Sébastien Baratchart, Vladimir Reshetov, Shiang-Yu Wang, François Dolon, Olivier Hernandez, Francesco Pepe, François Bouchy, Jennifer Dunn, Michel Dupieux, Gérard Gallou, Marie Larrieu, Alexandre Fonteneau, François Moreau, François Wildi, Laurent Parès, James Thomas, Chi-Hung Yan, René Doyon, Jean-François Donati, Philippe Vallée, Étienne Artigau, Xavier Delfosse, Patrick Rabou, Simon Thibault, Driss Kouach, David Loop

Proceedings Volume 8451, 84513J (2012) https://doi.org/10.1117/12.926392

KEYWORDS: Stars, Calibration, Control systems, Telescopes, Spectrographs, Sensors, Control systems design, Temperature metrology, Optical benches, Lamps

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Proceedings Article | 24 September 2012 Paper

Paper

The metrology cameras for Subaru PFS and FMOS

Shiang-Yu Wang, Yen-Shan Hu, Chi-Hung Yan, Yin-Chang Chang, Naoyuki Tamura, Naruhisa Takato, Atsushi Shimono, Jennifer Karr, Youichi Ohyama, Hsin-Yo Chen, Hung-Hsu Ling, Hiroshi Karoji, Hajime Sugai, Akitoshi Ueda

Proceedings Volume 8446, 84464Z (2012) https://doi.org/10.1117/12.925772

KEYWORDS: Cameras, Metrology, Optical fibers, CMOS sensors, Telescopes, Sensors, Imaging systems, Spectrographs, Distortion, CMOS cameras

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Proceedings Article | 24 September 2012 Paper

Paper

Prime focus spectrograph: Subaru's future

Hajime Sugai, Hiroshi Karoji, Naruhisa Takato, Naoyuki Tamura, Atsushi Shimono, Youichi Ohyama, Akitoshi Ueda, Hung-Hsu Ling, Marcio Vital de Arruda, Robert Barkhouser, Charles Bennett, Steve Bickerton, David Braun, Robin Bruno, Michael Carr, João Batista de Carvalho Oliveira, Yin-Chang Chang, Hsin-Yo Chen, Richard Dekany, Tania Pereira Dominici, Richard Ellis, Charles Fisher, James Gunn, Timothy Heckman, Paul T. Ho, Yen-Shan Hu, Marc Jaquet, Jennifer Karr, Masahiko Kimura, Olivier Le Fèvre, David Le Mignant, Craig Loomis, Robert Lupton, Fabrice Madec, Lucas Marrara, Laurent Martin, Hitoshi Murayama, Antonio Cesar de Oliveira, Claudia Mendes de Oliveira, Ligia Souza de Oliveira, Joseph Orndorff, Rodrigo de Paiva Vilaça, Vanessa Macanhan, Eric Prieto, Jesulino Bispo dos Santos, Michael Seiffert, Stephen Smee, Roger Smith, Laerte Sodré, David Spergel, Christian Surace, Sebastien Vives, Shiang-Yu Wang, Chi-Hung Yan

Proceedings Volume 8446, 84460Y (2012) https://doi.org/10.1117/12.926954

KEYWORDS: Spectrographs, Cameras, Telescopes, Microlens, Sensors, Metrology, Galactic astronomy, Data archive systems, Astronomy, Collimators

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Proceedings Article | 27 June 2006 Paper

Paper

CFHT WIRCam software architecture and implementation

Tom Vermeulen, Douglas Teeple, Billy Mahoney, James Thomas, Loic Albert, Pierre Martin, Thierry Forveille, Chi-Hung Yan

Proceedings Volume 6274, 62740J (2006) https://doi.org/10.1117/12.670543

KEYWORDS: Sensors, Stars, Telescopes, Image quality, Computer architecture, Cameras, Optical filters, Interfaces, Human-machine interfaces, Digital signal processing

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Showing 5 of 23 publications

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