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Proceedings Paper

The JWST Fine Guidance Sensor (FGS) and Near-Infrared Imager and Slitless Spectrograph (NIRISS)
Author(s): René Doyon; John B. Hutchings; Mathilde Beaulieu; Loic Albert; David Lafrenière; Chris Willott; Driss Touahri; Neil Rowlands; Micheal Maszkiewicz; Alex W. Fullerton; Kevin Volk; André R. Martel; Pierre Chayer; Anand Sivaramakrishnan; Roberto Abraham; Laura Ferrarese; Ray Jayawardhana; Doug Johnstone; Michael Meyer; Judith L. Pipher; Marcin Sawicki
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Paper Abstract

The Fine Guidance Sensor (FGS) is one of the four science instruments on board the James Webb Space Telescope (JWST). FGS features two modules: an infrared camera dedicated to fine guiding of the observatory and a science camera module, the Near-Infrared Imager and Slitless Spectrograph (NIRISS) covering the wavelength range between 0.7 and 5.0 μm with a field of view of 2.2' X 2.2'. NIRISS has four observing modes: 1) broadband imaging featuring seven of the eight NIRCam broadband filters, 2) wide-field slitless spectroscopy at a resolving power of rv150 between 1 and 2.5 μm, 3) single-object cross-dispersed slitless spectroscopy enabling simultaneous wavelength coverage between 0. 7 and 2.5 μm at Rrv660, a mode optimized for transit spectroscopy of relatively bright (J > 7) stars and, 4) sparse aperture interferometric imaging between 3.8 and 4.8 μm enabling high­ contrast ("' 10-4) imaging of M < 8 point sources at angular separations between 70 and 500 milliarcsec. This paper presents an overview of the FGS/NIRISS design with a focus on the scientific capabilities and performance offered by NIRISS.

Paper Details

Date Published: 21 September 2012
PDF: 13 pages
Proc. SPIE 8442, Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 84422R (21 September 2012); doi: 10.1117/12.926578
Show Author Affiliations
René Doyon, Univ. de Montréal (Canada)
John B. Hutchings, NRC Herzberg Institute of Astrophysics (Canada)
Mathilde Beaulieu, Univ. de Montréal (Canada)
Loic Albert, Univ. de Montréal (Canada)
David Lafrenière, Univ. de Montréal (Canada)
Chris Willott, NRC Herzberg Institute of Astrophysics (Canada)
Driss Touahri, COM DEV Canada (Canada)
Neil Rowlands, COM DEV Canada (Canada)
Micheal Maszkiewicz, Canadian Space Agency (Canada)
Alex W. Fullerton, Space Telescope Science Institute (United States)
Kevin Volk, Space Telescope Science Institute (United States)
André R. Martel, Space Telescope Science Institute (United States)
Pierre Chayer, Space Telescope Science Institute (United States)
Anand Sivaramakrishnan, Space Telescope Science Institute (United States)
Roberto Abraham, Univ. of Toronto (Canada)
Laura Ferrarese, NRC Herzberg Institute of Astrophysics (Canada)
Ray Jayawardhana, Univ. of Toronto (Canada)
Doug Johnstone, NRC Herzberg Institute of Astrophysics (Canada)
Michael Meyer, Institute for Astronomy, ETH Zürich (Switzerland)
Judith L. Pipher, Univ. of Rochester (United States)
Marcin Sawicki, Saint Mary's Univ. (Canada)


Published in SPIE Proceedings Vol. 8442:
Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave
Mark C. Clampin; Giovanni G. Fazio; Howard A. MacEwen; Jacobus M. Oschmann Jr., Editor(s)

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