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2. ULTIMATE-Subaru: GLAO preliminary design overview

Author

Yosuke Minowa, Yoshito Ono, Yoko Tanaka, Hiroshige Yoshida, Koki Terao, Yusei Koyama, Sadman Ali, Ichi Tanaka, Takashi Hattori, Hirofumi Okita, Yutaka Hayano, Shin Oya, Kentaro Motohara, Kenshi Yanagisawa, Michitoshi Yoshida, Masayuki Akiyama, Tadayuki Kodama, Hajime Ogane, Masahiro Konishi, Noelia Martínez Rey, Nicholas Herrald, Céline d'Orgeville, François Rigaut, Israel Vaughn, David Chandler, Dionne Haynes, Warrick Schofield, Shiang-Yu Wang, Chi-Yi Chou, and Masahiko Kimura

Published
2022
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6. MAVIS: imager and spectrograph

Author

Simon . Ellis, Anthony Horton, Christian Schwab, Timothy Chin, Robert Content, Nuwanthika Fernando, Nuria Lorente, Richard McDermid, Mahesh Mohanan, Helen McGregor, Jacob Pember, David Robertson, Scott Smedley, Will Saunders, Lew Waller, Ross Zhelem, Jessica Zheng, Johan Kosmalski, Giovanni Cresci, Trevor Mendel, Andrea Bianco, David Brodrick, Jennifer Burgess, Dionne Haynes, Davide Greggio, François Rigaut, and Alessio Zanutta

Published
2022
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7. The MAVIS Image Simulator: predicting the astrometric performance of MAVIS

Author

Giuseppe Bono, Dionne Haynes, Mojtaba Taheri, Daniele Vassallo, Giuliana Fiorentino, Jesse Cranney, Stephanie Monty, Guido Agapito, Cedric Plantet, Richard M. McDermid, Christian Schwab, J. Trevor Mendel, Davide Greggio, and Francois Rigaut

Subjects
Photometry (optics), Point spread function, Computer science, Globular cluster, High spatial resolution, Astrometry, High order, Residual, Simulation
Abstract

"We present initial results from the Multi-conjugate Adaptive-optics Visible Imager-Spectrograph Image Simulator (MAVISIM) to explore the astrometric capabilities of the next generation instrument MAVIS. A core scientific and operational requirement of MAVIS will be to achieve highly accurate differential astrometry, with accuracies on the order that of the extremely large telescopes. To better understand the impact of known and anticipated astrometric error terms, we have created an initial astrometric budget which we present here to motivate the creation of MAVISIM. In this first version of MAVISIM we include three major astrometric error sources; point spread function (PSF) field variability due to high order aberrations, PSF degradation and field variability due to tip-tilt residual error, and field distortions due to non-common path aberrations in the AO module. An overview of MAVISIM is provided along with initial results from a study using MAVISIM to simulate an image of a Milky Way-like globular cluster. Astrometric accuracies are extracted using PSF-fitting photometry with encouraging results that suggest MAVIS will deliver accuracies of 150µas down to faint magnitudes."

Published
2020
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8. First demonstration of OH suppression in a high efficiency near-infrared spectrograph

Author

Dionne Haynes, Sylvain Veilleux, Lisa J. Kewley, Markus Roth, Seong-sik Min, Kalaga Madhav, Ross Zhelem, Domenico Giannone, Joss Bland-Hawthorn, Christopher H. Betters, Rob Sharp, W. Couch, Aashia Rahman, Simon Ellis, R Haynes, Naveen Pai, Scott Case, E. Hernandez, Lee R. Spitler, Sergio G. Leon-Saval, Anthony Horton, Richard M. McDermid, and Jon Lawrence

Subjects
Physics, Brightness, business.industry, media_common.quotation_subject, Near-infrared spectroscopy, FOS: Physical sciences, Astronomy and Astrophysics, Rotational–vibrational spectroscopy, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 010309 optics, Atmosphere, Optics, Space and Planetary Science, Sky, 0103 physical sciences, Photonics, Astrophysics - Instrumentation and Methods for Astrophysics, Spectroscopy, business, 010303 astronomy & astrophysics, Spectrograph, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, media_common
Abstract

Ground-based near-infrared astronomy is severely hampered by the forest of atmospheric emission lines resulting from the rovibrational decay of OH molecules in the upper atmosphere. The extreme brightness of these lines, as well as their spatial and temporal variability, makes accurate sky subtraction difficult. Selectively filtering these lines with OH suppression instruments has been a long standing goal for near-infrared spectroscopy. We have shown previously the efficacy of fibre Bragg gratings combined with photonic lanterns for achieving OH suppression. Here we report on PRAXIS, a unique near-infrared spectrograph that is optimised for OH suppression with fibre Bragg gratings. We show for the first time that OH suppression (of any kind) is possible with high overall throughput (18 per cent end-to-end), and provide examples of the relative benefits of OH suppression., Comment: Accepted for publication in MNRAS

Published
2020
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10. Toward a conceptual design for MAVIS

Author

Francois Rigaut, David Brodrick, Guido Agapito, Valentina Viotto, Cedric Plantet, Bernardo Salasnich, Mcdermid, Richard M., Giovanni Cresci, Simon Ellis, Matteo Aliverti, Simone Antoniucci, Andrea Balestra, Andrea Baruffolo, Maria Bergomi, Marco Bonaglia, Giuseppe Bono, Lorenzo Busoni, Elena Carolo, Simonetta Chinellato, Gayandhi De Silva, Simone Esposito, Daniela Fantinel, Jacopo Farinato, Thierry Fusco, Dionne Haynes, Anthony Horton, Gaston Gausachs, James Gilbert, Damien Gratadour, Davide Greggio, Marco Gullieuszik, Pierre Haguenauer, Visa Korkiakoski, Demetrio Magrin, Laura Magrini, Luca Marafatto, Helen McGregor, Trevor Mendel, Stephanie Monty, Benoit Neichel, Fernando Pedichini, Enrico Pinna, Elisa Portaluri, Kalyan Radhakrishnan, Roberto Ragazzoni, David Robertson, Christian Schwab, Rob Sharp, Marco Stangalini, Stefan Stroebele, Elliott Thorn, Annino Vaccarella, Daniele Vassallo, Sudharshan Venkatesan, Lew Waller, Stacy Warner, Frederic Zamkotsian, and Hao Zhang

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