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Data processing for high-contrast imaging with the James Webb Space Telescope

Ygouf, Marie and Rocha, Graça and Beichman, Charles and Greenbaum, Alexandra and Leisenring, Jarron and De Furio, Matthew and Meyer, Michael and Girard, Julien and Pueyo, Laurent A. and Perrin, Marshall and Uyama, Taichi and Green, Joseph J. and Jewell, Jeffrey B. (2020) Data processing for high-contrast imaging with the James Webb Space Telescope. In: Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave. Proceedings of SPIE. No.11443. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 114433N. ISBN 9781510636736.

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The JamesWebb Space Telescope (JWST) will probe circumstellar environments at an unprecedented sensitivity. However, the performance of high-contrast imaging instruments is limited by the residual light from the star at close separations (<2-3"), where the incidence of exoplanets increases rapidly. There is currently no solution to get rid of the residual starlight down to the photon noise level at those separations, which may prevent some crucial discoveries. JWST's launch is planned for October 2021 with a planned baseline science mission lifetime of only five years. Thus, it is crucial to start developing a solution to this problem before its launch. We are investigating an innovative approach of post-processing built on a Bayesian framework that provides a more robust determination of faint astrophysical structures around a bright source. This approach uses a model of high-contrast imaging instrument that takes advantage of prior information, such as data from wavefront sensing (WFS) operations on JWST, to estimate simultaneously instrumental aberrations and the circumstellar environment. With this approach, our goal is to further improve the contrast gain over the contrast that can be achieved with JWST instruments, starting with NIRCam direct imaging and coronagraphic imaging. This work will pave the way for the future space-based high-contrast imaging instruments such as the Nancy Grace Roman Space Telescope_ Coronagraph Instrument (Roman CGI). This technique will be crucial to make the best use of the telemetry data that will be collected during the CGI operations.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Poster
Ygouf, Marie0000-0001-7591-2731
Rocha, Graça0000-0002-4150-8076
Beichman, Charles0000-0002-5627-5471
Greenbaum, Alexandra0000-0002-7162-8036
Leisenring, Jarron0000-0002-0834-6140
De Furio, Matthew0000-0003-1863-4960
Meyer, Michael0000-0003-1227-3084
Girard, Julien0000-0001-8627-0404
Pueyo, Laurent A.0000-0003-3818-408X
Perrin, Marshall0000-0002-3191-8151
Uyama, Taichi0000-0002-6879-3030
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:11443
Record Number:CaltechAUTHORS:20210113-131342338
Persistent URL:
Official Citation:Marie Ygouf, Graça Rocha, Charles Beichman, Alexandra Greenbaum, Jarron Leisenring, Matthew De Furio, Michael Meyer, Julien Girard, Laurent A. Pueyo, Marshall Perrin, Taichi Uyama, Joseph J. Green, and Jeffrey B. Jewell "Data processing for high-contrast imaging with the James Webb Space Telescope", Proc. SPIE 11443, Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave, 114433N (23 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107457
Deposited By: Tony Diaz
Deposited On:13 Jan 2021 22:40
Last Modified:16 Nov 2021 19:03

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