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James Webb Space Telescope
Near-InfraRed Imager and Slitless Spectrograph

NIRISSA science instrument known as the Near-InfraRed Imager and Slitless Spectrograph (NIRISS) is packaged with the guide camera (FGS), but is functionally independent. The NIRISS will be capable of wide-field grism spectroscopy with R~150 between 1.0 – 2.5 microns; single-object grism spectroscopy with R~700 between 0.6 – 3.0 microns; aperture-masking interferometry with a non-redundant mask (NRM) between 3.8 - 4.8 µm; and broad-band imaging across its 2.2' x 2.2' field between 1.0 - 5.0 µm. NIRISS is expected to contribute to all of the JWST Science Themes: 1) The End of the Dark Ages: First Light and Reionization; 2) The Assembly of Galaxies; 3) The Birth of Stars and Protoplanetary Systems; and 4) Planetary Systems and the Origin of Life.

The Canadian Space Agency is providing the NIRISS to the JWST Project. The prime contractor is Com Dev. The Principal Investigator for the NIRISS is René Doyon from the Université de Montréal.

Latest News

2015 February 12
FGS/NIRISS became the first instrument to be reinstalled in the Integrated Science Instrument Module (ISIM) following the "Half-Time Show." All the planned hardware changes were successfully completed and both instruments passed their electronic check-outs at room temperature with flying colors. FGS/NIRISS is ready for the final series of tests at NASA's Goddard Space Flight Center!

NIRISS at GSFC cleanroom

2014 December 17
Karl Saad, the Canadian Space Agency’s Project Manager for FGS/NIRISS, visited STScI to discuss plans for post-launch commissioning with the CSA-sponsored Instrument Scientists and other members of the FGS/NIRISS Team. Pictured from left-to-right are: Swara Ravindranath, André M., Karl Saad, and Pierre Chayer.

CSA Scientists

2014 December 10
“Half-Time Show” activities for FGS/NIRISS began with the removal of the flight hardware from the Integrated Science Instrument Module (ISIM) in the large cleanroom at NASA’s Goddard Space Flight Center. The picture shows the moment of extraction, as captured by the ISIM WebbCam. The “Half-Time Show” is a busy time for the COM DEV team, since it represents the final opportunity to replace inferior hardware. NIRISS priorities for this swap-out include the detector; a GR150 grism; the GR700XD grism; and new motors to drive the pupil and filter wheels. The flight instrument will be completely reassembled by January 7, 2015. Although it was the last package to be removed from ISIM, FGS/NIRISS will be the first to be reinstalled later in January.

FGS/NIRISS at GSFC cleanroom

2014 October 29
The Principle Investigator for NIRISS – Prof. René Doyon (Université de Montréal) – presented results from the ISIM CV2 testing of NIRISS at a 3-day meeting held at the Goddard Space Flight Center. Although NIRISS performed very well during this long test campaign, there is new concern about the health of one of the GR150 grisms.

2014 September 23
The FGS/NIRISS Instrument Teams at STScI proudly display their "Significant Achievement Awards" from the NASA JWST Project. The certificates recognize the Team's "extraordinary dedication and contributions" to NIRISS/FGS. Pictured from left-to-right are: Anand Sivaramakrishnan; Sherie Holfeltz; Alex Fullerton; Deepashri Thatte; Kevin Volk, André M., Swara Ravindranath; Paul Goudfrooij; Pierre Chayer; and Van Dixon. Missing: Ed Nelan (Photo by Michael Wolfe). What a Team!


2014 August 7 – 8
Members of the NIRISS Science Team met with representatives from the science teams for the other JWST instruments at STScI to exchange perspectives on the use of their respective "guaranteed" observing time and to explore synergies between different approaches to achieving JWST's scientific goals.

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