GRIS: The grating infrared spectrometer

Details GRIS: The grating infrared spectrometer GRIS: The grating infrared spectrometer

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106...94t&link_type=abstract

Publications of the Astronomical Society of the Pacific, vol. 106, no. 695, p. 94-100

Astronomy and Astrophysics

Astronomy

7

Echelle Gratings, Infrared Detectors, Infrared Spectrometers, Infrared Telescopes, Mercury Cadmium Tellurides, Near Infrared Radiation, Spectroscopic Telescopes, Arrays, Astronomical Photography, Astronomical Spectroscopy, Cameras, Collimators, Infrared Photography, Infrared Spectroscopy

Scientific paper

The grating infrared spectrometer (GRIS) is an echelle grating, prism cross-dispersed, spectrometer designed for the 2.3-m Steward Observatory telescope. The cross-dispersed format utilizes a Near Infrared Camera and Multi-Object Spectrometer 3 (NICMOS 3) HgCdTe detector array for observations in the 0.86-2.5 micrometer spectral region. An echelle grating, ruled on both sides, provides resolutions of 3449 and 9439 per slit width, respectively. Rotation of the grating achieves several functions: 1/2 pixel spectrum stepping for full Nyquist sampling, a change in the wavelength regions falling on the detector, and the means for changing grating sides.

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