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|Title: ||High contrast imaging with the JWST NIRCAM coronagraph.|
|Authors: ||Green, Joseph J.|
Basinger, Scott A.
Redding, David C.
Trauger, John T.
|Keywords: ||James Webb Space Telescope (JWST)|
Near Infrared Camera (NIRCAM)
high contrast imaging
|Issue Date: ||31-Jul-2005 |
|Publisher: ||Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2005.|
|Citation: ||SPIE 50th Annual Meeting and Optics & Photonics Conference, San Diego, California, July 31 - August 4, 2005.|
|Abstract: ||Relative to ground-based telescopes, the James Webb Space Telescope (JWST) will have a substantial sensitivity advantage in the 2.2-5pm wavelength range where brown dwarfs and hot Jupiters are thought to have significant brightness enhancements. To facilitate high contrast imaging within this band, the Near-Infrared Camera (NIRCAM) will employ a Lyot coronagraph with an array of band-limited image-plane occulting spots. In this paper, we provide the science motivation for high contrast imaging with NIRCAM, comparing its expected performance to that of the Keck, Gemini and 30 m (TMT) telescopes equipped with Adaptive Optics systems of different capabilities. We then describe our design for the NIRCAM coronagraph that enables imaging over the entire sensitivity range of the instrument while providing significant operational flexibility. We describe the various design tradeoffs that were made in consideration of alignment and aberration sensitivities and present contrast performance in the presence of JWST's expectcd optical aberrations. Finally we show an example of a that can provide 10-5 companion sensitivity at sub-arcsecond separations.|
|Appears in Collections:||JPL TRS 1992+|
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