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Proceedings Paper

High-contrast imaging performance of the JWST fine guider sensor tunable filter coronagraph
Author(s): Rene Doyon; David LaFreniere; Neil Rowlands; Clinton Evans; Richard Murowinski; John B. Hutchings; Russ Alexander
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Paper Abstract

The Fine Guider Sensor (FGS) of the James Webb Space Telescope (JWST) features two tunable filter (R~100) modules covering the 1.2-2.4 μm and 2.4-4.8 μm wavelength ranges, respectively. A set of occulting spots/bars mounted on a small slide located at the edge of the 2.3’x 2.3’ field of view (FOV) along with apodizing masks located in the filter wheel of each channel enable coronagraphic operation. Each coronagraphic field covers a square FOV of 20”x20”. The FGS-TF coronagraph complements the coronagraphic capabilities implemented in NIRCam and MIRI. This paper presents numerical simulations to predict the high-contrast imaging performance of the FGS-TF coronagraph. The combined coronagraphic and differential spectral imaging capabilities of the FGS-TF constitute a powerful tool for detecting and characterizing exoplanets with JWST.

Paper Details

Date Published: 12 October 2004
PDF: 8 pages
Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.551852
Show Author Affiliations
Rene Doyon, Univ. de Montreal (Canada)
David LaFreniere, Univ. de Montreal (Canada)
Neil Rowlands, INO (Canada)
Clinton Evans, INO (Canada)
Richard Murowinski, Herzberg Institute of Astrophysics, NRCC (Canada)
John B. Hutchings, Herzberg Institute of Astrophysics, NRCC (Canada)
Russ Alexander, Canadian Space Agency (Canada)


Published in SPIE Proceedings Vol. 5487:
Optical, Infrared, and Millimeter Space Telescopes
John C. Mather, Editor(s)

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