Specifications

Principal Parameters

Property specification
Observable Wavelength 4000-8700 A
Spectral Coverage 1500-3000 A width at one exposure
Spectral Resolution (lambda/Dlambda) 8600 (since 2006~)
Velocity Resolution 35 km/s
Optimal f-ratio of Telescopes f/10 or larger
Typical Polarimetric Accuracy 0.05-0.10%
Readout Noise 6 e-(69kHz; default)-3 e- (27kHz)
linearity of the CCD camera 0.2-0.3%
limiting magnitude mAB= 11 mag
(Halpha, 1A resolution, 0.7'' seeing, 4 hours exposure, at UH88 f/31)

Components

Component specification
Half-wave Plate AstroPribor Super-Achromatic Zero-Order Waveplate (APSAW)
Analyser double Wollaston prism,
quarts,
separation angle of rays ~6 degrees
Cross Dispersers 300 gr/mm, 750 nm blaze (for red wavelength range)
600 gr/mm, 500 nm blaze (for blue wavelength range)
Echelle Grating 72 gr/mm, blaze angle : 44 degrees
Entrance Slit 0.09 x 0.6mm (0.83 x 9.2 arcsec @ f/10)
Glan-Taylor prism depolarization factor < 5 x 10-5
CCD chip EEV 42-40 grade-5
2048 x 2048 pixels, 13.5 um sq.
Refrigerator Stirling-cycle Refrigerator DAIKIN WE-1000A
1W at 80K
CCD controller Messia-IV and M-Front
CCD temperature controller Lakeshore 330

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LIPS Developer Team since 1999. All rights reserved.