Dr. Robert T. Zellem Profile

Dr. Robert T. Zellem

at Jet Propulsion Laboratory

SPIE Involvement:

Author

Publications (10)

Proceedings Article | 5 October 2023 Presentation + Paper

Nancy Grace Roman Space Telescope coronagraph instrument overview and status

Vanessa Bailey, Bertrand Mennesson, Feng Zhao, Eduardo Bendek, Brian Monacelli, Gasia Bedrosian, Ewan Douglas, Tyler Groff, N. Jeremy Kasdin, John Krist, Bruce Macintosh, Patrick Morrissey, Ilya Poberezhskiy, Hari Subedi, Jason Rhodes, Aki Roberge, Marie Ygouf, Robert Zellem, Neil Zimmerman, Eric Cady, Caleb Baker, Sergi Hildebrandt

Proceedings Volume 12680, 126800T (2023) https://doi.org/10.1117/12.2679036

KEYWORDS: Coronagraphy, Equipment, Mirrors, Optical benches, Wavefront sensors, Deformable mirrors, Cameras, Prisms, Observatories, Wavefront errors

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Proceedings Article | 29 August 2022 Poster + Paper

Absolute flux calibrations for the Nancy Grace Roman Space Telescope Coronagraph Instrument

Robert Zellem, Marie Ygouf, Bruce Macintosh, Lindsey Payne

Proceedings Volume 12188, 121884G (2022) https://doi.org/10.1117/12.2628627

KEYWORDS: Stars, Coronagraphy, Calibration, Space telescopes, Planets, Signal to noise ratio, Visibility, Monte Carlo methods, Optical filters, Standards development

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Proceedings Article | 27 August 2022 Presentation + Paper

The Roman Space Telescope coronagraph technology demonstration: current status and relevance to future missions

S. Hildebrandt, M. Ygouf, J. Rhodes, N. Zimmerman, B. Nemati, G. Gonzalez, E. Cady, B. Kern, J. Krist, K. Heydorff, F. Mok, P. Morrissey, I. Poberezhskiy, A. Riggs, F. Shi, R. Akeson, L. Armus, J. Ingalls, P. Lowrance, B. Mennesson, V. Bailey, R. Zellem, T. Luchik, F. Zhao, T. Koch, A. Greenbaum

Proceedings Volume 12180, 121801W (2022) https://doi.org/10.1117/12.2629176

KEYWORDS: Coronagraphy, Wavefront sensors, Electron multiplying charge coupled devices, Imaging spectroscopy, Wavefronts, Stars, Spectroscopy, Performance modeling, Cameras, Observatories

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Proceedings Article | 27 August 2022 Presentation + Paper

Nancy Grace Roman Space Telescope coronagraph instrument observation calibration plan

Robert Zellem, Bijan Nemati, Vanessa Bailey, Ruslan Belikov, Eric Cady, M. Mark Colavita, John Debes, Ewan Douglas, Julien Girard, Guillermo Gonzalez, Tyler Groff, Sergi Hildebrandt, Bruce Macintosh, Erin Maier, Bertrand Mennesson, Daniel Ryan, Carey Weisberg, Marie Ygouf, Neil Zimmerman, Lindsey Payne, Robert De Rosa, Jeremy Kasdin, Patrick Lowrance

Proceedings Volume 12180, 121801Z (2022) https://doi.org/10.1117/12.2627567

KEYWORDS: Calibration, Stars, Coronagraphy, Planets, Sensors, Polarization, Point spread functions, Error analysis, Signal to noise ratio, Uranus

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Proceedings Article | 1 September 2021 Presentation + Paper

The Roman Space Telescope coronagraph technology demonstration: current status and relevance to future missions

J. Krist, B. Mennesson, V. P. Bailey, R. Zellem, N. Zimmerman, M. Ygouf, S. Hildebrandt, J. Rhodes, J. Kasdin, B. Macintosh, P. Lowrance, T. Meshkat, M. Turnbull, E. Douglas, A. Mandell, B. Nemati, G. Gonzalez, E. Cady, B. Kern, F. Shi, F. Mok, P. Morrissey, K. Heydorff, I. Pobereszhskiy, F. Zhao, T. Luchik, E. Maier, R. Akeson, L. Armus, J. Ingalls

Proceedings Volume 11823, 1182310 (2021) https://doi.org/10.1117/12.2603343

KEYWORDS: Coronagraphy, Electron multiplying charge coupled devices, Wavefront sensors, Cameras, Wavefronts, Imaging spectroscopy, Stars, Imaging systems, Spectroscopy, Polarimetry

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Proceedings Article | 16 December 2020 Presentation + Paper

SPARCS payload assembly, integration, and test update

Paul Scowen, David Ardila, Johnathan Gamaunt, Shouleh Nikzad, April Jewell, Jim Austin, Matthew Beasley, Evgenya Shkolnik, Travis Barman, Judd Bowman, Varoujan Gorjian, Dawn Gregory, Daniel Jacobs, Joe Llama, Mary Knapp, Victoria Meadows, Sarah Peacock, Tahina Ramiaramanantsoa, Mark Swain, Peter Vedder, Lisa Whelan, Robert Zellem, Logan Jensen

Proceedings Volume 11444, 114440A (2020) https://doi.org/10.1117/12.2562582

KEYWORDS: Stars, Near ultraviolet, Custom fabrication, Optical fabrication, Integrated optics, Calibration, Light sources, Contamination control, Telescopes, Staring arrays

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Proceedings Article | 15 December 2020 Presentation + Paper

The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) technology demonstration

N. Jeremy Kasdin, Bruce Macintosh, Margaret Turnbull, Vanessa Bailey, Bertrand Mennesson, Robert Zellem, Jason Rhodes, Feng Zhao, Marie Ygouf, Thomas Luchik, A. J. Eldorado Riggs, Byoung-Joon Seo, Roxana Lupu, John Krist, Brian Kern, Hong Tang, Bijan Nemati, Tyler Groff, Neil Zimmerman, John Debes, Ewan Douglas

Proceedings Volume 11443, 114431U (2020) https://doi.org/10.1117/12.2562997

KEYWORDS: Coronagraphy, Imaging spectroscopy, Planets, Infrared telescopes, James Webb Space Telescope, Imaging systems, Wavefronts, Algorithm development, Jupiter, Infrared radiation

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Proceedings Article | 9 September 2019 Presentation

WFIRST design reference mission: the coronagraph instrument (Conference Presentation)

Vanessa Bailey, Bertrand Mennesson, John Debes, Dmitry Savransky, Robert Zellem

Proceedings Volume 11117, 111170E (2019) https://doi.org/10.1117/12.2527942

KEYWORDS: Coronagraphy, Infrared telescopes, Visible radiation, Infrared imaging, Infrared radiation, Telescopes, Imaging systems, Spectrographs, Exoplanets, Calibration

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Proceedings Article | 6 July 2018 Presentation + Paper

Monitoring the high-energy radiation environment of exoplanets around low-mass stars with SPARCS (Star-Planet Activity Research CubeSat)

Paul Scowen, Evgenya Shkolnik, David Ardila, Judd Bowman, Daniel Jacobs, April Jewell, Matthew Beasley, Mark Swain, Varoujan Gorjian, Shouleh Nikzad, Victoria Meadows, Travis Berman, Robert Zellem, Joe Llama, Michael Fitzgerald, Constance Spittler

Proceedings Volume 10699, 106990F (2018) https://doi.org/10.1117/12.2315543

KEYWORDS: Ultraviolet radiation, Stars, Atmospheric modeling, Space operations, Space telescopes, Planets, Telescopes, Sensors, Exoplanets, Control systems

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Proceedings Article | 6 July 2018 Paper

The new NESSI: refurbishment of an NIR MOS for characterizing exoplanets using the Hale telescope

M. Creech-Eakman, M. Swain, R. Zellem, A. Olivares, C. Salcido, F. Santoro, C. Jurgenson, G. Vasisht, L. Schmidt, K. Pearson

Proceedings Volume 10702, 107023K (2018) https://doi.org/10.1117/12.2314242

KEYWORDS: Exoplanets, Cryogenics, Near infrared, Magdalena Ridge Observatory, Near infrared spectroscopy, Sensors

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Showing 5 of 10 publications

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