The JWST Fine Guidance Sensor (FGS) and Near-Infrared Imager and Slitless Spectrograph (NIRISS)

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DOIResolve DOI: http://doi.org/10.1117/12.926578
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Proceedings titleSPIE - International Society for Optical Engineering. Proceedings
ConferenceSpace Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave, 1 July 2012 through 6 July 2012, Amsterdam
ISSN0277-786X
ISBN9780819491435
Volume8442
Article number84422R
SubjectAngular separation; Broadband filters; Broadband imaging; Exo-planets; Field of views; Fine guidance sensors; High contrast imaging; Infra-red cameras; Interferometric imaging; JWST instrumentation; Near Infrared; Point sources; Sparse aperture; Wavelength coverage; Wavelength ranges; Wide-field; Infrared devices; Interferometry; Millimeter waves; Sensors; Source separation; Space telescopes; Spectrographs; Spectroscopy; Instruments
AbstractThe Fine Guidance Sensor (FGS) is one of the four science instruments on board the JamesWebb 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'×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 ̃150 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 R ̃ 660, 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. © 2012 SPIE.
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LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Herzberg Institute of Astrophysics (HIA-IHA)
Peer reviewedYes
NPARC number21269424
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Record identifier33026ae4-994b-402b-adb3-9dfae33c4c8a
Record created2013-12-12
Record modified2017-04-24
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