The echelle-spectrometer LYNX is a part of the spectral complex
( NES ,
MSS , LYNX)
having a common control located at the Nasmyth-2 focus platform of
the 6-m telescope.
The echelle spectrometer LYNX is designed and assembled by
LSS SAO .
Optical elements were produced mainly at the Vavilov Optical State
The optical layout
(without its preslit devices) is presented
The preslit devices are presented
The focal length of the
collimator is F=3074mm, the collimated beam d=100mm.
The echelle gratings of 37.5 gr/mm and 75 gr/mm, the blaze angle
64.3 grad and blazed area 300x200mm are used.
The gratings for cross dispersion have 150, 300 and 600 gr/mm,
their blazed area is 145x145mm.
The Shmidt camera's focal length is F=387 mm, the camera's mirror diameter
is D=240mm, the diameter of the correction plate is D=210 mm.
The echelle spectrometer LYNX is equipped with the CCD (1040x1160 pixels,
the pixel size 16x16mkm) developed by
ADL SAO .
This spectrometer is intended for a spectroscopy of objects with
a high spectral resolution (R about 35000) in the wavelength
range 5000-9000 AA.
The number of spectral
orders registered simultaneously by the detector is determined by
the cross-dispersion grating.
The source of the comparison spectrum is a Th-Ar lamp.
The accuracy of radial velocity measurements
using the spectrograph is 0.1-0.2 km/s, while the equivalent width
measuring accuracy amounts to 5-6 %, for the line
equivalent widths in the interval 4-10 mA.
The CCD and image recording are controlled with a PC inside the
environment of OS Linux.
Echelle-spectra are available for users in FITS format.
More details you could find in the
description of LYNX
(PostScript-file, in Russian). Some details of the construction are
presented in the SAO Preprint, 1999, N139.
For consultations or other requests, please, contact with
Dr. Maksim Yushkin: