GRIS - THE GRATING INFRARED SPECTROMETER

Authors
THOMPSON RI EPPS HW WINTERS G WOMACK W MENTZELL E
Citation
Ri. Thompson et al., GRIS - THE GRATING INFRARED SPECTROMETER, Publications of the Astronomical Society of the Pacific, 106(695), 1994, pp. 94-100
Citations number
1
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Publications of the Astronomical Society of the Pacific
ISSN journal
00046280 → ACNP
Volume
106
Issue
695
Year of publication
1994
Pages
94 - 100
Database
ISI
SICI code
0004-6280(1994)106:695<94:G-TGIS>2.0.ZU;2-3
Abstract
The grating infrared spectrometer (GRIS) is an echelle grating, prism cross-dispersed, spectrometer designed for the 2.3-m Steward Observato ry telescope. The cross-dispersed format utilizes a NICMOS 3 HgCdTe de tector array for observations in the 0.86-2.5 mu m spectral region. An echelle grating, ruled on both sides, provides resolutions of 3449 an d 9439 per slit width, respectively. Rotation of the grating achieves several functions: 1/2 pixel spectrum stepping for full Nyquist sampli ng, a change in the wavelength regions falling on the detector, and th e means for changing grating sides.