The Nancy Grace Roman Space Telescope Coronagraph Instrument (CGI) is a critical technology demonstrator for NASA’s Habitable Worlds Observatory. With a demonstrated visible-light flux ratio detection limit of better than 10-8, it will be capable of directly imaging both gas giant exoplanets and circumstellar disks.
CGI completed its integration and test at the Jet Propulsion Laboratory in Spring 2024 and is currently undergoing further environmental testing while integrated into the Roman Space Telescope (RST) observatory. The RST is scheduled for launch in 2026. This talk will review the coronagraphy science, CGI observing modes and applications, and highlight its optical alignment, integration, and thermal-vacuum test results.
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