Basic instrument parameter-en

Observing wavelength
360 - 1000nm
Reciprocal resolution
65,000 for 0.76 arcsec slit width.100,000 was achieved when the slit width was 0.38 arcsec.
Detector
CCD:13.5μm square pixel, 2048x4096 pixels
Collimator
off-axis parabola (D=100mm, FL=2850mm)
Camera
spherical lens system (D=200mm, FL=855mm)
Echelle grating
31.6 gr/mm (R=2.14, θbl=65°),ruled area|254mmx128mm, Zerodur used with ε=3.6°, γ=8°.
Cross-disperser
(1).250 gr/mm (red), λbl=700nm, θbl=5.0°, (2).400 gr/mm (blue), λbl=415nm, θbl=4.76°, ruled area: 150mmx210mm, Zerodur for both, used with ε=0°, γ=45°for both.
System efficiency
3%@500nm
Limiting magnitude

12mag at V-band

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Last-modified: 2008-03-06 (木) 10:44:09 (5278d)

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