The JWST fine guidance sensor

Neil Rowlands; David Aldridge; Richard Allen; Clinton Evans; Phil Gregory; Earl Hartwig; Brian Mackay; John Metcalfe; Gareth Richardson; Dwight Caldwell; Robert Deschambault; Terry Girard; John Hackett; Dennis Henry; John B. Hutchings; Chris Morbey; Richard Murowinski; Rene Doyon; Russ Alexander

doi:10.1117/12.551929

12 October 2004 The JWST fine guidance sensor

Neil Rowlands, David Aldridge, Richard Allen, Clinton Evans, Phil Gregory, Earl Hartwig, Brian Mackay, John Metcalfe, Gareth Richardson, Dwight Caldwell, Robert Deschambault, Terry Girard, John Hackett, Dennis Henry, John B. Hutchings, Chris Morbey, Richard Murowinski, Rene Doyon, Russ Alexander

Author Affiliations +

Proceedings Volume 5487, Optical, Infrared, and Millimeter Space Telescopes; (2004) https://doi.org/10.1117/12.551929
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

The science instrumentation for the James Webb Space Telescope (JWST) has concluded its Phase A definition stage. We have developed a concept for the JWST Fine Guidance Sensor (FGS), which will form the Canadian contribution to the mission. As part of the JWST re-plan in early 2003, the FGS design was recast to incorporate a narrow-band (R~100) science-imaging mode. This capability was previously resident in the NIRCam instrument. This FGS science mode makes use of tunable filters and filter wheels containing blocking filters, calibration sources and aperture masks. The science function of the FGS Tunable Filters (FGS-TF) remains complementary to the NIRCam science goals. Narrow-band FGS-TF imaging will be employed during many of the JWST deep imaging surveys to take advantage of the sensitivity to emission line objects. The FGS-TF will also provide a coronagraphic capability for the characterization of host galaxies of active galactic nuclei and for the characterization of extra solar planets. The primary function of the FGS remains to provide the sensor data for the JWST Observatory line-of-sight stabilization system. We report here on the overall configuration of the FGS and we indicate how the concept meets the performance and interface requirements.

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Neil Rowlands, David Aldridge, Richard Allen, Clinton Evans, Phil Gregory, Earl Hartwig, Brian Mackay, John Metcalfe, Gareth Richardson, Dwight Caldwell, Robert Deschambault, Terry Girard, John Hackett, Dennis Henry, John B. Hutchings, Chris Morbey, Richard Murowinski, Rene Doyon, and Russ Alexander "The JWST fine guidance sensor", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); https://doi.org/10.1117/12.551929

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