High-contrast imaging performance of the JWST fine guider sensor tunable filter coronagraph

被引：3

作者：

Doyon, R ^{[1
]}

LaFrenière, D ^{[1
]}

Rowlands, N ^{[1
]}

Evans, C ^{[1
]}

Hutchings, JB ^{[1
]}

Alexander, R ^{[1
]}

机构：

[1] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada

来源：

OPTICAL, INFRARED, AND MILLIMETER SPACE TELESCOPES, PTS 1-3 | 2004年 / 5487卷

关键词：

James Webb Space Telescope; infrared imaging; guidance sensor; tunable filters; astronomical instrumentation; coronagraph;

D O I：

10.1117/12.551852

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The Fine Guider Sensor (FGS) of the James Webb Space Telescope (JWST) features two tunable filter (Rsimilar to100) modules covering the 1.2-2.4 mum and 2.4-4.8 mum wavelength ranges, respectively. A set of occulting spots/bars mounted on a small slide located at the edge of the 2.3'x2.3' 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 toot for detecting and characterizing exoplanets with JWST.

引用

页码：746 / 753

页数：8

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