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The spectrograph is designed for detailed studies of extended objects - galaxies and HII regions with a moderate spectral resolution. It is installed in the prime focus of the 6-m telescope of Special Astrophysical Observatory RAS. The updated Universal Astronomical Grating Spectrograph (UAGS, Carl Zeiss Jena) with a fast Schmidt camera is a base of the Long Slit Spectrograph (LSS). A cryostated Charge Coupled Device (CCD) detector is built inside the Schmidt camera. LSS is remotelycontrolled (shutter, angle of grating and a comparison spectrum system). A local TV-guide system attached to LSS is used to position the observed object in the spectrograph slit and to guide it during exposure.

The present modification of LSS is used on 6-m telescope from November 1994. It was realized in the Laboratory of Spectroscopy and Photometry of Extragalactic Objects of SAO RAS.

Note: 'Fast spectrograph of the 6-m telescope prime focus' and/or 'UAGS + CCD' are often used as a name of this spectrograph too.

LSS parameters:

Collimator A parabolic mirror, F/4 (F=300 mm)
Camera A Schmidt camera, F/0.9 (F=110 mm) Optical schem
Comparison spectrum He+Ne+Ar spectral lamp Atlas
Slit length 140 arcsec
Image scale 0.41 arcsec/px
Wavelength range 3500 - 10000 AA
Gratings 325(4), 651(8) and 1302(17) grooves/mm Gratings parameters
Linear dispersion 5.8, 3.1 and 1.5 A/px
TV-guide field 3 arcmin
CCD detector ISD015A ("Electron" St-Petersburg), 530*580 px Spectral sensibility
Pixel size 18*24 mkm
Readout noise 12 electron
Total quantum eficiency maximum 8% at 5500 A (telescope+spectrograph+detector) QE% Fig

Would You like to see some examples of LSS spectra? Click here!

LSS page is designed by A.N.Burenkov ( >LSS страница написана А.Н.Буренковым ()

Created: 14 October 1998

Updated:1 November 1998

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