Dr. Masahiko Hayashi Profile

Dr. Masahiko Hayashi

at Subaru Telescope NAOJ

SPIE Involvement:

Author

Publications (24)

Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Status of the SCExAO instrument: recent technology upgrades and path to a system-level demonstrator for PSI

Julien Lozi, Olivier Guyon, Sébastien Vievard, Ananya Sahoo, Vincent Deo, Nemanja Jovanovic, Barnaby Norris, Marc-Antoine Martinod, Ben Mazin, Alex Walter, Neelay Fruitwala, Sarah Steiger, Kristina Davis, Peter Tuthill, Tomoyuki Kudo, Hajime Kawahara, Takayuki Kotani, Michael Ireland, Theodoros Anagnos, Chrstian Schwab, Nick Cvetojevic, Elsa Huby, Sylvestre Lacour, Kevin Barjot, Tyler Groff, Jeffrey Chilcote, Jeremy Kasdin, Frantz Martinache, Romain Laugier, Mamadou N'Diaye, Justin Knight, Jared Males, Steven Bos, Frans Snik, David Doelman, Kelsey Miller, Eduardo Bendek, Ruslan Belikov, Eugene Pluzhnik, Thayne Currie, Masayuki Kuzuhara, Taichi Uyama, Jun Nishikawa, Naoshi Murakami, Jun Hashimoto, Yosuke Minowa, Christophe Clergeon, Yoshito Ono, Naruhisa Takato, Motohide Tamura, Hideki Takami, Masa Hayashi

Proceedings Volume 11448, 114480N (2020) https://doi.org/10.1117/12.2562832

KEYWORDS: Imaging systems, Telescopes, Infrared sensors, Infrared imaging, Coronagraphy, Wavefront sensors, Sensors, Detection and tracking algorithms, Cameras, Wavefronts

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Proceedings Article | 13 July 2018 Paper

Paper

SCExAO, an instrument with a dual purpose: perform cutting-edge science and develop new technologies

Julien Lozi, Olivier Guyon, Nemanja Jovanovic, Sean Goebel, Prashant Pathak, Nour Skaf, Ananya Sahoo, Barnaby Norris, Frantz Martinache, Mamadou N'Diaye, Ben Mazin, Alex Walter, Peter Tuthill, Tomoyuki Kudo, Hajime Kawahara, Takayuki Kotani, Michael Ireland, Nick Cvetojevic, Elsa Huby, Sylvestre Lacour, Sébastien Vievard, Tyler Groff, Jeffrey Chilcote, Jeremy Kasdin, Justin Knight, Frans Snik, David Doelman, Yosuke Minowa, Christophe Clergeon, Naruhisa Takato, Motohide Tamura, Thayne Currie, Hideki Takami, Masa Hayashi

Proceedings Volume 10703, 1070359 (2018) https://doi.org/10.1117/12.2314282

KEYWORDS: Cameras, Coronagraphy, Polarization, Near infrared, Speckle, Exoplanets, Wavefronts, Telescopes, Infrared radiation, Polarimetry

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Proceedings Article | 13 July 2018 Paper

Paper

The infrared Doppler (IRD) instrument for the Subaru telescope: instrument description and commissioning results

Takayuki Kotani, Motohide Tamura, Jun Nishikawa, Akitoshi Ueda, Masayuki Kuzuhara, Masashi Omiya, Jun Hashimoto, Masato Ishizuka, Teruyuki Hirano, Hiroshi Suto, Takashi Kurokawa, Tsukasa Kokubo, Takahiro Mori, Yosuke Tanaka, Ken Kashiwagi, Mihoko Konishi, Tomoyuki Kudo, Bun'ei Sato, Shane Jacobson, Klaus Hodapp, Donald Hall, Wako Aoki, Tomonori Usuda, Shogo Nishiyama, Tadashi Nakajima, Yuji Ikeda, Tomoyasu Yamamuro, Jun-Ichi Morino, Haruka Baba, Ko Hosokawa, Hiroyuki Ishikawa, Norio Narita, Eiichiro Kokubo, Yutaka Hayano, Hideyuki Izumiura, Eiji Kambe, Nobuhiko Kusakabe, Jungmi Kwon, Masahiro Ikoma, Yasunori Hori, Hidenori Genda, Akihiko Fukui, Yuka Fujii, Hajime Kawahara, Guyon Olivier, Nemanja Jovanovic, Hiroki Harakawa, Masahiko Hayashi, Masahide Hidai, Masahiro Machida, Taro Matsuo, Tetsuya Nagata, Masahiro Ogihara, Hideki Takami, Naruhisa Takato, Hiroshi Terada, Daehyeon Oh

Proceedings Volume 10702, 1070211 (2018) https://doi.org/10.1117/12.2311836

KEYWORDS: Stars, Spectroscopy, Telescopes, Sensors, Cameras, Error analysis, Mirrors, Infrared telescopes, Frequency combs, Adaptive optics

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SPIE Journal Paper | 24 November 2017 Open Access

Open Access

Data reduction pipeline for the CHARIS integral-field spectrograph I: detector readout calibration and data cube extraction

Timothy D. Brandt, Maxime Rizzo, Tyler Groff, Jeffrey Chilcote, Johnny P. Greco, N. Jeremy Kasdin, Mary Anne Limbach, Michael Galvin, Craig Loomis, Gillian Knapp, Michael W. McElwain, Nemanja Jovanovic, Thayne Currie, Kyle Mede, Motohide Tamura, Naruhisa Takato, Masahiko Hayashi

JATIS, Vol. 3, Issue 04, 048002, (November 2017) https://doi.org/10.1117/12.10.1117/1.JATIS.3.4.048002

KEYWORDS: Sensors, Calibration, Spectrographs, Point spread functions, Signal to noise ratio, Photometry, Iterated function systems, Spectral resolution, Gemini Planet Imager, K band

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Proceedings Article | 1 September 2017 Presentation + Paper

Presentation + Paper

First light of the CHARIS high-contrast integral-field spectrograph

Tyler Groff, Jeffrey Chilcote, Timothy Brandt, N. Jeremy Kasdin, Michael Galvin, Craig Loomis, Maxime Rizzo, Gillian Knapp, Olivier Guyon, Nemanja Jovanovic, Julien Lozi, Thayne Currie, Naruhisa Takato, Masahiko Hayashi

Proceedings Volume 10400, 1040016 (2017) https://doi.org/10.1117/12.2273525

KEYWORDS: Imaging systems, Spectrographs, Iterated function systems, Adaptive optics, K band, Spectral resolution, Exoplanets, High angular resolution imaging, Telescopes, Observatories

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Proceedings Article | 9 August 2016 Paper

Paper

Laboratory testing and performance verification of the CHARIS integral field spectrograph

Tyler Groff, Jeffrey Chilcote, N. Jeremy Kasdin, Michael Galvin, Craig Loomis, Michael Carr, Timothy Brandt, Gillian Knapp, Mary Anne Limbach, Olivier Guyon, Nemanja Jovanovic, Michael McElwain, Naruhisa Takato, Masahiko Hayashi

Proceedings Volume 9908, 99080O (2016) https://doi.org/10.1117/12.2233447

KEYWORDS: Spectrographs, Prisms, Telescopes, K band, Cryogenics, Coronagraphy, Spectral resolution, Point spread functions, Sensors, Calibration

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The Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) is an integral field spectrograph (IFS) that has been built for the Subaru telescope. CHARIS has two imaging modes; the high-resolution mode is R82, R69, and R82 in J, H, and K bands respectively while the low-resolution discovery mode uses a second low-resolution prism with R19 spanning 1.15-2.37 microns (J+H+K bands). The discovery mode is meant to augment the low inner working angle of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) adaptive optics system, which feeds CHARIS a coronagraphic image. The goal is to detect and characterize brown dwarfs and hot Jovian planets down to contrasts five orders of magnitude dimmer than their parent star at an inner working angle as low as 80 milliarcseconds. CHARIS constrains spectral crosstalk through several key aspects of the optical design. Additionally, the repeatability of alignment of certain optical components is critical to the calibrations required for the data pipeline. Specifically, the relative alignment of the lenslet array, prism, and detector must be highly stable and repeatable between imaging modes. We report on the measured repeatability and stability of these mechanisms, measurements of spectral crosstalk in the instrument, and the propagation of these errors through the data pipeline. Another key design feature of CHARIS is the prism, which pairs Barium Fluoride with Ohara L-BBH2 high index glass. The dispersion of the prism is significantly more uniform than other glass choices, and the CHARIS prisms represent the first NIR astronomical instrument that uses L-BBH2 as the high index material. This material choice was key to the utility of the discovery mode, so significant efforts were put into cryogenic characterization of the material. The final performance of the prism assemblies in their operating environment is described in detail. The spectrograph is going through final alignment, cryogenic cycling, and is being delivered to the Subaru telescope in April 2016. This paper is a report on the laboratory performance of the spectrograph, and its current status in the commissioning process so that observers will better understand the instrument capabilities. We will also discuss the lessons learned during the testing process and their impact on future high-contrast imaging spectrographs for wavefront control.

Proceedings Article | 26 July 2016 Paper

Paper

The SCExAO high contrast imager: transitioning from commissioning to science

N. Jovanovic, O. Guyon, J. Lozi, T. Currie, J. Hagelberg, B. Norris, G. Singh, P. Pathak, D. Doughty, S. Goebel, J. Males, J. Kuhn, E. Serabyn, P. Tuthill, G. Schworer, F. Martinache, T. Kudo, H. Kawahara, T. Kotani, M. Ireland, T. Feger, A. Rains, J. Bento, C. Schwab, D. Coutts, N. Cvetojevic, S. Gross, A. Arriola, T. Lagadec, J. Kasdin, T. Groff, B. Mazin, Y. Minowa, N. Takato, M. Tamura, H. Takami, M. Hayashi

Proceedings Volume 9909, 99090W (2016) https://doi.org/10.1117/12.2234294

KEYWORDS: Adaptive optics, Imaging systems, Stars, Telescopes, Calibration, Visible radiation, Spectrographs, Speckle, Cameras, Prisms

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Proceedings Article | 16 September 2015 Paper

Paper

The CHARIS IFS for high contrast imaging at Subaru

Tyler Groff, N. Jeremy Kasdin, Mary Anne Limbach, Michael Galvin, Michael Carr, Gillian Knapp, Timothy Brandt, Craig Loomis, Norman Jarosik, Kyle Mede, Michael McElwain, Douglas Leviton, Kevin Miller, Manuel Quijada, Olivier Guyon, Nemanja Jovanovic, Naruhisa Takato, Masahiko Hayashi

Proceedings Volume 9605, 96051C (2015) https://doi.org/10.1117/12.2188465

KEYWORDS: Wavefronts, Iterated function systems, Prisms, Coronagraphy, Adaptive optics, Sensors, Spectrographs, K band, Telescopes, Collimators

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Proceedings Article | 7 August 2014 Paper

Paper

Adaptive optics at the Subaru telescope: current capabilities and development

Olivier Guyon, Yutaka Hayano, Motohide Tamura, Tomoyuki Kudo, Shin Oya, Yosuke Minowa, Olivier Lai, Nemanja Jovanovic, Naruhisa Takato, Jeremy Kasdin, Tyler Groff, Masahiko Hayashi, Nobuo Arimoto, Hideki Takami, Colin Bradley, Hajime Sugai, Guy Perrin, Peter Tuthill, Ben Mazin

Proceedings Volume 9148, 91481R (2014) https://doi.org/10.1117/12.2057273

KEYWORDS: Telescopes, Adaptive optics, Cameras, Exoplanets, Spectrographs, Imaging spectroscopy, Imaging systems, Visible radiation, Coronagraphy, Wavefront sensors

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Proceedings Article | 21 July 2014 Paper

Paper

CHARIS science: performance simulations for the Subaru Telescope's third-generation of exoplanet imaging instrumentation

Timothy Brandt, Michael McElwain, Markus Janson, Gillian Knapp, Kyle Mede, Mary Limbach, Tyler Groff, Adam Burrows, James Gunn, Olivier Guyon, Jun Hashimoto, Masahiko Hayashi, Nemanja Jovanovic, N. Kasdin, Masayuki Kuzuhara, Robert Lupton, Frantz Martinache, Satoko Sorahana, David Spiegel, Naruhisa Takato, Motohide Tamura, Edwin Turner, Robert Vanderbei, John Wisniewski

Proceedings Volume 9148, 914849 (2014) https://doi.org/10.1117/12.2057256

KEYWORDS: Stars, Planets, Exoplanets, Telescopes, Adaptive optics, Gemini Planet Imager, Coronagraphy, Space telescopes, Iterated function systems, Combustion

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Proceedings Article | 18 July 2014 Paper

Paper

The mechanical design of CHARIS: an exoplanet IFS for the Subaru Telescope

Michael Galvin, Michael Carr, Tyler Groff, N. Jeremy Kasdin, Radford Fagan, Masahiko Hayashi, Naruhisa Takato

Proceedings Volume 9151, 91513G (2014) https://doi.org/10.1117/12.2056645

KEYWORDS: Mirrors, Telescopes, Sensors, Aluminum, Optomechanical design, Prisms, Cryocoolers, Mechanical engineering, Collimators, Tolerancing

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Proceedings Article | 18 July 2014 Paper

Paper

Construction and status of the CHARIS high contrast imaging spectrograph

Tyler Groff, N. Kasdin, Mary Limbach, Michael Galvin, Michael Carr, Gillian Knapp, Timothy Brandt, Craig Loomis, Norm Jarosik, Kyle Mede, Michael McElwain, Markus Janson, Olivier Guyon, Nemanja Jovanovic, Naruhisa Takato, Frantz Martinache, Masahiko Hayashi

Proceedings Volume 9147, 91471W (2014) https://doi.org/10.1117/12.2055769

KEYWORDS: Prisms, Spectrographs, Sensors, Coronagraphy, Telescopes, K band, Spectral resolution, Wavefronts, Exoplanets, Planets

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Princeton University is building the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), an integral field spectrograph (IFS) for the Subaru telescope. CHARIS is funded by the National Astronomical Observatory of Japan and is designed to take high contrast spectra of brown dwarfs and hot Jovian planets in the coronagraphic image provided by the Coronagraphic Extreme Adaptive Optics (SCExAO) and the AO188 adaptive optics systems. The project is now in the build and test phase at Princeton University. Once laboratory testing has been completed CHARIS will be integrated with SCExAO and AO188 in the winter of 2016. CHARIS has a high-resolution characterization mode in J, H, and K bands. The average spectral resolution in J, H, and K bands are R82, R68, and R82 respectively, the uniformity of which is a direct result of a new high index material, L-BBH2. CHARIS also has a second low-resolution imaging mode that spans J,H, and K bands with an average spectral resolution of R19, a feature unique to this instrument. The field of view in both imaging modes is 2.07x2.07 arcseconds. SCExAO+CHARIS will detect objects five orders of magnitude dimmer than their parent star down to an 80 milliarcsecond inner working angle. The primary challenge with exoplanet imaging is the presence of quasi-static speckles in the coronagraphic image. SCExAO has a wavefront control system to suppress these speckles and CHARIS will address their impact on spectral crosstalk through hardware design, which drives its optical and mechanical design. CHARIS constrains crosstalk to be below 1% for an adjacent source that is a full order of magnitude brighter than the neighboring spectra. Since CHARIS is on the Nasmyth platform, the optical alignment between the lenslet array and prism is highly stable. This improves the stability of the spectra and their orientation on the detector and results in greater stability in the wavelength solution for the data pipeline. This means less uncertainty in the post-processing and less overhead for on-sky calibration procedures required by the data pipeline. Here we present the science case, design, and construction status of CHARIS. The design and lessons learned from testing CHARIS highlights the choices that must be considered to design an IFS for high signal-to-noise spectra in a coronagraphic image. The design considerations and lessons learned are directly applicable to future exoplanet instrumentation for extremely large telescopes and space observatories capable of detecting rocky planets in the habitable zone.

Proceedings Article | 14 July 2014 Paper

Paper

Infrared Doppler instrument (IRD) for the Subaru telescope to search for Earth-like planets around nearby M-dwarfs

Takayuki Kotani, Motohide Tamura, Hiroshi Suto, Jun Nishikawa, Bun'ei Sato, Wako Aoki, Tomonori Usuda, Takashi Kurokawa, Ken Kashiwagi, Shogo Nishiyama, Yuji Ikeda, Donald Hall, Klaus Hodapp, Jun Hashimoto, Jun-Ichi Morino, Yasushi Okuyama, Yosuke Tanaka, Shota Suzuki, Sadahiro Inoue, Jungmi Kwon, Takuya Suenaga, Dehyun Oh, Haruka Baba, Norio Narita, Eiichiro Kokubo, Yutaka Hayano, Hideyuki Izumiura, Eiji Kambe, Tomoyuki Kudo, Nobuhiko Kusakabe, Masahiro Ikoma, Yasunori Hori, Masashi Omiya, Hidenori Genda, Akihiko Fukui, Yuka Fujii, Olivier Guyon, Hiroki Harakawa, Masahiko Hayashi, Masahide Hidai, Teruyuki Hirano, Masayuki Kuzuhara, Masahiro Machida, Taro Matsuo, Tetsuya Nagata, Hirohi Onuki, Masahiro Ogihara, Hideki Takami, Naruhisa Takato, Yasuhiro Takahashi, Chihiro Tachinami, Hiroshi Terada, Hajime Kawahara, Tomoyasu Yamamuro

Proceedings Volume 9147, 914714 (2014) https://doi.org/10.1117/12.2055075

KEYWORDS: Stars, Optical fibers, Planets, Spectroscopy, Adaptive optics, Optical benches, Frequency combs, Sensors, Infrared telescopes, Ceramics

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Proceedings Article | 26 September 2013 Paper

Paper

Design of the CHARIS integral field spectrograph for exoplanet imaging

Tyler Groff, Mary Anne Peters, N. Jeremy Kasdin, Gillian Knapp, Michael Galvin, Michael Carr, Michael McElwain, Timothy Brandt, Markus Janson, James Gunn, Robert Lupton, Olivier Guyon, Frantz Martinache, Nemanja Jovanovic, Masahiko Hayashi, Naruhisa Takato

Proceedings Volume 8864, 88640H (2013) https://doi.org/10.1117/12.2025081

KEYWORDS: Prisms, Planets, Spectrographs, Exoplanets, Coronagraphy, Sensors, Adaptive optics, Telescopes, Cameras, Space telescopes

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Proceedings Article | 26 September 2013 Paper

Paper

The optical design of CHARIS: an exoplanet IFS for the Subaru telescope

Mary Anne Peters-Limbach, Tyler Groff, N. Jeremy Kasdin, Dave Driscoll, Michael Galvin, Allen Foster, Michael Carr, Dave LeClerc, Rad Fagan, Michael McElwain, Gillian Knapp, Timothy Brandt, Markus Janson, Olivier Guyon, Nemanja Jovanovic, Frantz Martinache, Masahiko Hayashi, Naruhisa Takato

Proceedings Volume 8864, 88641N (2013) https://doi.org/10.1117/12.2024070

KEYWORDS: Spectrographs, Prisms, Iterated function systems, Sensors, Point spread functions, Telescopes, Exoplanets, Optical design, Spectral resolution, Mirrors

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Proceedings Article | 24 September 2012 Paper

Paper

Conceptual design of the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) for the Subaru telescope

Mary Peters, Tyler Groff, N. Jeremy Kasdin, Michael McElwain, Michael Galvin, Michael Carr, Robert Lupton, James Gunn, Gillian Knapp, Qian Gong, Alexis Carlotti, Timothy Brandt, Markus Janson, Olivier Guyon, Frantz Martinache, Masahiko Hayashi, Naruhisa Takato

Proceedings Volume 8446, 84467U (2012) https://doi.org/10.1117/12.926381

KEYWORDS: Point spread functions, Sensors, Telescopes, Coronagraphy, Iterated function systems, Exoplanets, Adaptive optics, Spectrographs, Imaging spectroscopy, Optical instrument design

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Proceedings Article | 24 September 2012 Paper

Paper

Scientific design of a high contrast integral field spectrograph for the Subaru Telescope

Michael McElwain, Timothy Brandt, Markus Janson, Gillian Knapp, Mary Peters, Adam Burrows, Alexis Carlotti, Michael Carr, Tyler Groff, James Gunn, Olivier Guyon, Masahiko Hayashi, N. Jeremy Kasdin, Masayuki Kuzuhara, Robert Lupton, Frantz Martinache, David Spiegel, Naruhisa Takato, Motohide Tamura, Edwin Turner, Robert Vanderbei

Proceedings Volume 8446, 84469C (2012) https://doi.org/10.1117/12.927108

KEYWORDS: Exoplanets, Stars, Telescopes, Planets, Spectrographs, Coronagraphy, Adaptive optics, Iterated function systems, Spectral resolution, Imaging spectroscopy

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Proceedings Article | 25 July 2008 Paper

Paper

HiCIAO: the Subaru Telescope's new high-contrast coronographic imager for adaptive optics

Klaus Hodapp, Ryuji Suzuki, Motohide Tamura, Lyu Abe, Hiroshi Suto, Ryo Kandori, Junichi Morino, Tetsuo Nishimura, Hideki Takami, Olivier Guyon, Shane Jacobson, Vern Stahlberger, Hubert Yamada, Richard Shelton, Jun Hashimoto, Alexander Tavrov, Jun Nishikawa, Nobuharu Ukita, Hideyuki Izumiura, Masahiko Hayashi, Tadashi Nakajima, Toru Yamada, Tomonori Usuda

Proceedings Volume 7014, 701419 (2008) https://doi.org/10.1117/12.788088

KEYWORDS: Adaptive optics, Telescopes, Imaging systems, Optical filters, Infrared cameras, Methane, Absorption, Sensors, Prisms, Image filtering

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Proceedings Article | 9 July 2008 Paper

Paper

High resolution spectrograph unit (HRU) for the SUBARU/IRCS

Hiroshi Terada, Ikeda Yuji, Naoto Kobayashi, Chikako Yasui, Tae-Soo Pyo, Tomonori Usuda, Masahiko Hayashi, Hideyo Kawakita

Proceedings Volume 7014, 701434 (2008) https://doi.org/10.1117/12.788561

KEYWORDS: Silicon, Spectrographs, Telescopes, Infrared radiation, Optical design, Infrared telescopes, Refractive index, Infrared spectroscopy, Collimators, Astronomy

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Proceedings Article | 28 June 2006 Paper

Paper

Concept and science of HiCIAO: high contrast instrument for the Subaru next generation adaptive optics

Motohide Tamura, Klaus Hodapp, Hideki Takami, Lyu Abe, Hiroshi Suto, Olivier Guyon, Shane Jacobson, Ryo Kandori, Jun-Ichi Morino, Naoshi Murakami, Vern Stahlberger, Ryuji Suzuki, Alexander Tavrov, Hubert Yamada, Jun Nishikawa, Nobuharu Ukita, Jun Hashimoto, Hideyuki Izumiura, Masahiko Hayashi, Tadashi Nakajima, Tetsuo Nishimura

Proceedings Volume 6269, 62690V (2006) https://doi.org/10.1117/12.670742

KEYWORDS: Coronagraphy, Adaptive optics, Stars, Telescopes, Exoplanets, Polarization, Astronomy, Optical filters, Space telescopes, Actuators

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Proceedings Article | 25 July 2000 Paper

Paper

Proposal management system of the Subaru Telescope

Ryusuke Ogasawara, Junichi Noumaru, George Kosugi, Masahiko Hayashi, Chris Simpson, Motohide Tamura, Jun Kawai, Kenji Kawarai

Proceedings Volume 4010, (2000) https://doi.org/10.1117/12.392507

KEYWORDS: Telescopes, Computing systems, Databases, Astronomical telescopes, Data modeling, Observatories, Image processing, Computer networks, Astronomy, Optical instrument design

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Proceedings Article | 29 June 2000 Paper

Paper

Scientific results and prospects from the 8.2-m Subaru Telescope: star forming regions

Masahiko Hayashi, Kazuhiro Sekiguchi

Proceedings Volume 4005, (2000) https://doi.org/10.1117/12.390145

KEYWORDS: Telescopes, Stars, Space telescopes, Infrared imaging, Infrared telescopes, Iron, Chlorine, Thermography, Visualization, Astronomy

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Proceedings Article | 28 August 1998 Paper

Paper

HII/L2 mission: future Japanese infrared astronomical mission

Takao Nakagawa, Masahiko Hayashi, Mitsunobu Kawada, Hideo Matsuhara, Toshio Matsumoto, Hiroshi Murakami, Haruyuki Okuda, Takashi Onaka, Hiroshi Shibai, Munetaka Ueno

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324469

KEYWORDS: Telescopes, Space telescopes, Infrared radiation, Infrared telescopes, Infrared astronomy, Astronomy, Satellites, Cryogenics, Liquids, Helium

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Proceedings Article | 25 August 1998 Paper

Paper

Tip-tilt and chopping mechanism for the Subaru Telescope IR secondary mirror unit

Noboru Itoh, Yasushi Horiuti, Kouki Asari, Masahiko Hayashi

Proceedings Volume 3352, (1998) https://doi.org/10.1117/12.319310

KEYWORDS: Mirrors, Actuators, Infrared telescopes, Telescopes, Secondary tip-tilt mirrors, Prototyping, Sensors, Dynamical systems, Lightweight mirrors, Astronomical telescopes

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Showing 5 of 24 publications

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