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

Author

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

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
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., Comment: 17 pages, 10 figures. Proceeding of SPIE Astronomical Telescopes and Instrumentation 2016

Published
2016
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2. Metrology Camera System of Prime Focus Spectrograph for Subaru Telescope

Author

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

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope. PFS will cover a 1.3 degree diameter field with 2394 fibers to complement the imaging capabilities of Hyper SuprimeCam. To retain high throughput, the final positioning accuracy between the fibers and observing targets of PFS is required to be less than 10um. The metrology camera system (MCS) serves as the optical encoder of the fiber motors for the configuring of fibers. MCS provides the fiber positions within a 5um error over the 45 cm focal plane. The information from MCS will be fed into the fiber positioner control system for the closed loop control. MCS will be located at the Cassegrain focus of Subaru telescope in order to to cover the whole focal plane with one 50M pixel Canon CMOS camera. It is a 380mm Schmidt type telescope which generates a uniform spot size with a 10 micron FWHM across the field for reasonable sampling of PSF. Carbon fiber tubes are used to provide a stable structure over the operating conditions without focus adjustments. The CMOS sensor can be read in 0.8s to reduce the overhead for the fiber configuration. The positions of all fibers can be obtained within 0.5s after the readout of the frame. This enables the overall fiber configuration to be less than 2 minutes. MCS will be installed inside a standard Subaru Cassgrain Box. All components that generate heat are located inside a glycol cooled cabinet to reduce the possible image motion due to heat. The optics and camera for MCS have been delivered and tested. The mechanical parts and supporting structure are ready as of spring 2016. The integration of MCS will start in the summer of 2016., Comment: 11 pages, 15 figures. SPIE proceeding. arXiv admin note: text overlap with arXiv:1408.2876

Published
2016

3. The Current Status of Prime Focus Instrument of Subaru Prime Focus Spectrograph

Author

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

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
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., Comment: 9 pages, 8 figures, SPIE proceeding

Published
2016
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4. Prime Focus Spectrograph for the Subaru telescope: massively multiplexed optical and near-infrared fiber spectrograph

Author

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

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
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 {\mu}m to 1.26 {\mu}m, 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 {\mu}m to 0.89 {\mu}m 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., Comment: 19 pages, 11 figures

Published
2015
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5. 2018 August 15 stellar occultation by minor planet (134340) Pluto

Author

Silva-Cabrera, José Sergio, primary, Castro-Chacón, Joel Humberto, additional, Reyes-Ruiz, Mauricio, additional, Lehner, Matthew J, additional, Guerrero, Carlos Alberto, additional, Huang, Chung-Kai, additional, Alvarez-Santana, Fernando Iván, additional, Chang, Yin-Chang, additional, Ling, Hung-Hsu, additional, Porras-Navarro, Issac, additional, Hernández-Águila, Joannes Bosco, additional, Pérez-Arce, Rosa L, additional, Rojas-Quintero, Juan Antonio, additional, Avila, Remy, additional, Wang, Shiang-Yu, additional, Alcock, Charles, additional, Chen, Wen-Ping, additional, Granados Contreras, Agueda Paula, additional, Cook, Kem H, additional, Geary, John C, additional, Hernández-Valencia, Benajmín, additional, Kavelaars, J J, additional, Norton, Timothy, additional, Sánchez, Edilberto, additional, Szentgyorgyi, Andrew, additional, Yen, Wei-Ling, additional, and Zhang, Zhi-Wei, additional

Published
2022
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6. Prime Focus Spectrograph (PFS): a next-generation facility instrument of the Subaru telescope has started coming

Author

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

Abstract

PFS (Prime Focus Spectrograph) is a next generation facility instruments on the Subaru telescope. 2394 reconfigurable fibers will be distributed in the 1.3 degree field of view, and the spectrograph has 3 arms (blue, red, and near-infrared) to simultaneously observe spectra from 380nm to 1260nm in one exposure. In 2018, Metrology Camera System was delivered to the observatory and successfully tested on the telescope. Now in Nov 2019 the first spectrograph module with visible cameras is being shipped to Hawaii. The other subsystems are actively being developed to start on-sky engineering observation in 2020, and science operation in 2022. In this contribution, an overview of the current status and future perspectives will be presented.

Published
2020

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

Author

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

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

8. Metrology camera system of prime focus spectrograph for Subaru Telescope

Author

Evans, Christopher J., Simard, Luc, Takami, Hideki, Wang, Shiang-Yu, Chou, Richard C. Y., Huang, Pin-Jie, Ling, Hung-Hsu, Karr, Jennifer, Chang, Yin-Chang, Hu, Yen-Shan, Hsu, Shu-Fu, Chen, Hsin-Yo, Gunn, James E., Reiley, Dan J., Tamura, Naoyuki, Takato, Naruhisa, Shimono, Atsushi, Evans, Christopher J., Simard, Luc, Takami, Hideki, Wang, Shiang-Yu, Chou, Richard C. Y., Huang, Pin-Jie, Ling, Hung-Hsu, Karr, Jennifer, Chang, Yin-Chang, Hu, Yen-Shan, Hsu, Shu-Fu, Chen, Hsin-Yo, Gunn, James E., Reiley, Dan J., Tamura, Naoyuki, Takato, Naruhisa, and Shimono, Atsushi

Abstract

The Prime Focus Spectrograph (PFS) is a new optical/near-infrared multi-fiber spectrograph designed for the prime focus of the 8.2m Subaru telescope. PFS will cover a 1.3 degree diameter field with 2394 fibers to complement the imaging capabilities of Hyper SuprimeCam. To retain high throughput, the final positioning accuracy between the fibers and observing targets of PFS is required to be less than 10 microns. The metrology camera system (MCS) serves as the optical encoder of the fiber motors for the configuring of fibers. MCS provides the fiber positions within a 5 microns error over the 45 cm focal plane. The information from MCS will be fed into the fiber positioner control system for the closed loop control. MCS will be located at the Cassegrain focus of Subaru telescope in order to cover the whole focal plane with one 50M pixel Canon CMOS camera. It is a 380mm Schmidt type telescope which generates a uniform spot size with a ~10 micron FWHM across the field for reasonable sampling of the point spread function. Carbon fiber tubes are used to provide a stable structure over the operating conditions without focus adjustments. The CMOS sensor can be read in 0.8s to reduce the overhead for the fiber configuration. The positions of all fibers can be obtained within 0.5s after the readout of the frame. This enables the overall fiber configuration to be less than 2 minutes. MCS will be installed inside a standard Subaru Cassgrain Box. All components that generate heat are located inside a glycol cooled cabinet to reduce the possible image motion due to heat. The optics and camera for MCS have been delivered and tested. The mechanical parts and supporting structure are ready as of spring 2016. The integration of MCS will start in the summer of 2016. In this report, the performance of the MCS components, the alignment and testing procedure as well as the status of the PFS MCS will be presented.

Published
2016

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

Author

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

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.

Published
2016

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