Mr. Tobias Schofield Profile

Tobias Schofield

at Caltech

SPIE Involvement:

Author

Publications (11)

Proceedings Article | 14 August 2024 Poster + Paper

Recent upgrades to the Keck Planet Imager and Characterizer

Daniel Echeverri, Nemanja Jovanovic, Jacques-Robert Delorme, Charlotte Guthery, Mitsuko Roberts, Reston Nash, Katelyn Horstman, Jerry Xuan, Yinzi Xin, Luke Finnerty, Chih-Chun Hsu, Garreth Ruane, Stepahnie Leifer, Jake Zimmer, Svarun Soda, Tobias Schofield, J. Kent Wallace, Jason Wang, Dimitri Mawet, Eduardo Marin, Peter Wizinowich, Jinhao Ge, Maodong Gao

Proceedings Volume 13096, 130962D (2024) https://doi.org/10.1117/12.3019085

KEYWORDS: Adaptive optics, Optical switching, K band, Single mode fibers, Prisms, Exoplanets, Nulling interferometry, Astronomical spectroscopy

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Proceedings Article | 18 July 2024 Poster + Paper

Fringing analysis and forward modeling of Keck Planet Imager and Characterizer (KPIC) spectra

Katelyn Horstman, Jean-Baptiste Ruffio, Jason Wang, Chih-Chun Hsu, Ashley Baker, Luke Finnerty, Jerry Xuan, Daniel Echeverri, Dimitri Mawet, Geoffrey Blake, Randall Bartos, Charlotte Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Michael Fitzgerald, Nemanja Jovanovic, Ronald Lopez, Emily Martin, Evan Morris, Jacklyn Pezzato, Garreth Ruane, Ben Sappey, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich

Proceedings Volume 13096, 130962E (2024) https://doi.org/10.1117/12.3018020

KEYWORDS: Data modeling, Stars, Geometrical optics, Calibration, Modeling, Spectral models, Planets, Observational astronomy, Imaging systems

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Proceedings Article | 18 July 2024 Presentation + Paper

The high-contrast performance of the Keck Planet Imager and Characterizer

Jason Wang, Dimitri Mawet, Jerry Xuan, Chih-Chun Hsu, Jean-Baptiste Ruffio, Katelyn Horstman, Yinzi Xin, Jacques-Robert Delorme, Nemanja Jovanovic, Yapeng Zhang, Luke Finnerty, Ashley Baker, Randall Bartos, Geoffrey Blake, Benjamin Calvin, Sylvain Cetre, Gregory Doppmann, Daniel Echeverri, Michael Fitzgerald, Joshua Liberman, Ronald Lopez, Evan Morris, Jacklyn Pezzato-Rovner, Ben Sappey, Tobias Schofield, Andrew Skemer, J. Kent Wallace, Ji Wang

Proceedings Volume 13096, 130961X (2024) https://doi.org/10.1117/12.3019114

KEYWORDS: Stars, Speckle, Planets, Spectrographs, Signal to noise ratio, Sensors, K band, Imaging systems, Adaptive optics, Coronagraphy

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Proceedings Article | 5 October 2023 Presentation + Paper

Characterization of hot Jupiter atmospheres with Keck/KPIC

Luke Finnerty, Katelyn Horstman, Jean-Baptiste Ruffio, Jason Wang, Dimitri Mawet, Tobias Schofield, Ben Sappey, Jerry Xuan, Jacques-Robert Delorme, Nemanja Jovanovic, Geoffrey Blake, Michael Fitzgerald

Proceedings Volume 12680, 1268006 (2023) https://doi.org/10.1117/12.2677777

KEYWORDS: Atmospheres, Fiber science, Fringe analysis, Planets, Fabry–Perot interferometers, Exoplanets, Spectroscopy

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SPIE Journal Paper | 12 September 2023

Vortex fiber nulling for exoplanet observations: implementation and first light

Daniel Echeverri, Jerry Xuan, Nemanja Jovanovic, Garreth Ruane, Jacques-Robert Delorme, Dimitri Mawet, Bertrand Mennesson, Eugene Serabyn, J. Kent Wallace, Jason Wang, Jean-Baptiste Ruffio, Luke Finnerty, Yinzi Xin, Maxwell Millar-Blanchaer, Ashley Baker, Randall Bartos, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Michael Fitzgerald, Sofia Hillman, Katelyn Horstman, Chih-Chun Hsu, Joshua Liberman, Ronald Lopez, Evan Morris, Jacklyn Pezzato, Caprice Phillips, Bin Ren, Ben Sappey, Tobias Schofield, Andrew Skemer, Connor Vancil, Ji Wang

JATIS, Vol. 9, Issue 03, 035002, (September 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.3.035002

KEYWORDS: Stars, Equipment, Exoplanets, Planets, Single mode fibers, Point spread functions, K band, Nulling interferometry, Wavefront aberrations, Calibration

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Proceedings Article | 29 August 2022 Presentation + Paper

Phase II of the Keck Planet Imager and characterizer: system-level laboratory characterization and preliminary on-sky commissioning

Daniel Echeverri, Nemanja Jovanovic, Jacques-Robert Delorme, Yinzi Xin, Tobias Schofield, Luke Finnerty, Jason Wang, Jerry Xuan, Dimitri Mawet, Ashley Baker, Randall Bartos, Charlotte Bond, Marta Bryan, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Michael Fitzgerald, Jason Fucik, Katelyn Horstman, Ronald Lopez, Emily Martin, Stefan Martin, Bertrand Mennesson, Evan Morris, Reston Nash, Jackie Pezzato, Michael Porter, Sam Ragland, Mitsuko Roberts, Garreth Ruane, Jean-Baptiste Ruffio, Ben Sappey, Eugene Serabyn, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich

Proceedings Volume 12184, 121841W (2022) https://doi.org/10.1117/12.2630518

KEYWORDS: Adaptive optics, Calibration, Coronagraphy, Point spread functions, Imaging systems, Single mode fibers, Planets, Photodetectors

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Proceedings Article | 29 August 2022 Poster + Paper

On-sky performance and lessons learned from the phase I KPIC fiber injection unit

Luke Finnerty, Tobias Schofield, Jacques-Robert Delorme, Ben Sappey, Jason J. Wang, Jean-Baptiste Ruffio, Dimitri Mawet, Michael Fitzgerald, Nemanja Jovanovic, Ashley Baker, Randall Bartos, Charlotte Bond, Marta Bryan, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Daniel Echeverri, Ronald Lopez, Emily Martin, Evan Morris, Jacklyn Pezzato, Sam Ragland, Garreth Ruane, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich, Jerry Xuan

Proceedings Volume 12184, 121844Y (2022) https://doi.org/10.1117/12.2630276

KEYWORDS: Calibration, Fiber science, Adaptive optics, K band, Spectroscopy, Cameras, Mirrors, Spectrographs, Single mode fibers, Light sources

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Proceedings Article | 1 September 2021 Presentation + Paper

High resolution spectroscopy of directly imaged exoplanets with KPIC

Jason Wang, Jacques-Robert Delorme, Jean-Baptiste Ruffio, Evan Morris, Nemanja Jovanovic, Daniel Echeverri, Tobias Schofield, Jacklyn Pezzato, Andy Skemer, Dimitri Mawet

Proceedings Volume 11823, 1182302 (2021) https://doi.org/10.1117/12.2596484

KEYWORDS: Planets, Exoplanets, Imaging spectroscopy, Stars, Speckle, Single mode fibers, Spectroscopy, Distortion, Spectral resolution, Image resolution

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SPIE Journal Paper | 13 August 2021 Open Access

Keck Planet Imager and Characterizer: a dedicated single-mode fiber injection unit for high-resolution exoplanet spectroscopy

Jacques-Robert Delorme, Nemanja Jovanovic, Daniel Echeverri, Dimitri Mawet, James Kent Wallace, Randall Bartos, Sylvain Cetre, Peter Wizinowich, Sam Ragland, Scott Lilley, Edward Wetherell, Greg Doppmann, Jason Wang, Evan Morris, Jean-Baptiste Ruffio, Emily Martin, Michael Fitzgerald, Garreth Ruane, Tobias Schofield, Nick Suominen, Benjamin Calvin, Eric Wang, Kenneth Magnone, Christopher Johnson, Ji Man Sohn, Ronald Lopez, Charlotte Bond, Jacklyn Pezzato, Jorge Llop-Sayson, Mark Chun, Andrew Skemer

JATIS, Vol. 7, Issue 03, 035006, (August 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.3.035006

KEYWORDS: Calibration, Fiber science, Cameras, Imaging systems, Adaptive optics, Stars, Single mode fibers, Sensors, Planets, Mirrors

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Enhanced high-dispersion coronagraphy with KPIC phase II: design, assembly and status of sub-modules

N. Jovanovic, B. Calvin, M. Porter, T. Schofield, J. Wang, M. Roberts, G. Ruane, J. Wallace, R. Bartos, J. Pezzato, J. Colborn, J. R. Delorme, D. Echeverri, D. Mawet, C. Bond, S. Cetre, S. Lilley, S. Ragland, P. Wizinowich, R. Jensen-Clem

Proceedings Volume 11447, 114474U (2020) https://doi.org/10.1117/12.2563107

KEYWORDS: Coronagraphy, Device simulation, Planets, Exoplanets, Atmospheric optics, Imaging systems, L band, Image resolution, Visible radiation, Signal to noise ratio

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Proceedings Article | 13 December 2020 Presentation + Paper

The Keck Planet Imager and Characterizer: A dedicated single-mode fiber injection unit for high resolution exoplanet spectroscopy

Jacques-Robert Delorme, Nemanja Jovanovic, Daniel Echeverri, Dimitri Mawet, J. Wallace, Randall Bartos, Sylvain Cetre, Peter Wizinowich, Sam Ragland, Jason Wang, Jean-Baptiste Ruffio, Scott Lilley, Edward Wethrell, Greg Doppmann, Michael Fitzgerald, Garreth Ruane, Tobias Schofield, Benjamin Calvin, Evan Morris, Jacklyn Pezzato, Jorge Llop Sayson, Ken Magnone, Chris Johnson, Jiman Shohn, Charlotte Bond, Mark Chun, Nick Suominen, Andy Skemer

Proceedings Volume 11447, 114471P (2020) https://doi.org/10.1117/12.2562836

KEYWORDS: Imaging systems, Planets, Image resolution, Spectral resolution, Coronagraphy, L band, Adaptive optics, Infrared imaging, Infrared spectroscopy, Infrared radiation

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Showing 5 of 11 publications

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