Spectrograph Parameters

Slit projection
slit on sky, 3-m telescope	530-microns/arc second
slit on sky, CAT	106-microns/arc second
slit on detector (15-micron pixel)	330-microns/pixel

Dispersion
5.61 Angstroms/mm @ 10000 Angstroms
3.64 Angstroms/mm @ 6500 Angstroms
1.96 Angstroms/mm @ 3500 Angstroms

Wavelength Range
approximately 3500 to 10000 Angstroms in 107 orders (m=57 to 163)

Resolution and Instrumental Profile
narrow slit (0.2 arcsecs.)	approximately 100,000 @ 6000 Angstroms	approximately 0.06 Angstroms (1.2 pixels) fwhm
typical slit (1.2 arcsecs.)	approximately 60,000 @ 6000 Angstroms	approximately 0.10 Angstroms (2.0 pix) fwhm

Optics
Collimator	12-inch off-axis parabola, fl=7.4754 m, beam at collimator=0.2084 m
Grating	echelle, 31.5 lines/mm, blaze angle=64.7 degrees, theta=5.5
Cross Disperser	two UBK prisms at 43.9 degrees
Camera	508.3-mm f.l., f1.7, folded Schmidt camera and field flattener
Coatings	overcoated silver mirrors and anti-reflection coated transmissive optics
Magnification	-22 (slit to detector, dispersion direction)