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

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

45 Scopus citations


The Coronagraph Instrument (CGI) on the Nancy Grace Roman Space Telescope will demonstrate the highcontrast technology necessary for visible-light exoplanet imaging and spectroscopy from space via direct imaging of Jupiter-size planets and debris disks. This in-space experience is a critical step toward future, larger missions targeted at direct imaging of Earth-like planets in the habitable zones of nearby stars. This paper presents an overview of the current instrument design and requirements, highlighting the critical hardware, algorithms, and operations being demonstrated. We also describe several exoplanet and circumstellar disk science cases enabled by these capabilities. A competitively selected Community Participation Program team will be an integral part of the technology demonstration and could perform additional CGI observations beyond the initial tech demo if the instrument performance warrants it.

Original languageEnglish (US)
Title of host publicationSpace Telescopes and Instrumentation 2020
Subtitle of host publicationOptical, Infrared, and Millimeter Wave
EditorsMakenzie Lystrup, Marshall D. Perrin
ISBN (Electronic)9781510636736
StatePublished - 2020
EventSpace Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave - Virtual, Online, United States
Duration: Dec 14 2020Dec 22 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSpace Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave
Country/TerritoryUnited States
CityVirtual, Online


  • CGI
  • Coronagraphy
  • High-contrast imaging
  • Roman

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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