The JWST Near Infrared Imager and Slitless Spectrograph (NIRISS) provides observing modes for slitless spectroscopy, high-contrast interferometric imaging, and imaging, at wavelengths between 0.6 and 5.0 μm over a 2.2' x 2.2' FOV.

JWST NIRISS has 12 medium- and broadband filters that cover the wavelength range between 0.8 and 5.0 μm in support of applications involving aperture masking interferometry, wide field slitless spectroscopy, and imaging.

Fine Guidance Sensor and Near Infrared Imager and Slitless Spectrograph (FGS-NIRISS) is an instrument on the James Webb Space Telescope (JWST) that combines a Fine Guidance Sensor and a science instrument, a near-infrared imager and a spectrograph. [1]

2025年2月4日 · The Fine Guidance Sensor (FGS) allows Webb to point precisely, so that it can obtain high-quality images. The Near Infrared Imager and Slitless Spectrograph part of the FGS/NIRISS is used to investigate the following science objectives: first light detection, exoplanet detection and characterization, and exoplanet transit spectroscopy.

NIRISS The Near Infrared Imager and Slitless Spectrograph supports four observing modes: SOSS, AMI, WFSS and Imaging. SOSS – Single Object Slit-Less Spectroscopy; WFSS – Wide Field Silt-Less Spectroscopy; AMI – Aperture Masking Interferometry; Imaging – Imaging for parallel observations with another JWST instrument – not yet supported

Advice on how to optimize JWST NIRISS imaging observations is covered in this article. See also: NIRISS Imaging, NIRISS Imaging APT Template, JWST Parallel Observations, APT Coordinated Parallel Observations.

2021年7月15日 · NIRISS provides near-infrared imaging and spectroscopic capabilities. As the only instrument capable of aperture mask interferometry, NIRISS has the unique ability to capture images of bright objects at a resolution greater than the other imagers. NIRISS is a contribution of the Canadian Space Agency.

The wide field slitless spectroscopy (WFSS) mode of JWST’s Near Infrared Imager and Slitless Spectrograph (NIRISS) enables low-resolution (R ≈ 150) spectroscopy between 0.8–2.2 μm, over the 2.2’ × 2.2’ FOV.

2023年1月9日 · Our results validate the JWST’s NIRISS/SOSS as an instrument mode fully capable of producing excellent exoplanet atmosphere measurements.

The Near Infrared Imager and Slitless Spectrograph (NIRISS) onboard JWST offers four independent observing modes to enable scientific observations from our own solar system to the edge of the Universe.