International Center for Astronomical, Medical and Ecological Research
 3-camera Coude-Echelle Spectrograph

 3-camera Coude-Echelle Spectrograph with spectral resolution up to 500,000.
 Spectrograph MAESTRO (MAtrix Echelle Spectrograph) installed at the coude focus of the ZEISS-2000 telescope (peak Terskol, Kabarda-Balkarian republic) was designed for wide-bandpass stellar spectroscopy with resolutions from 40000 to 180000 in spectral range 3500-10000 ÅÅ. This instrument was put into operation in 1997.

  • the collimator is an off-axis parabolic mirror with a diameter of 200 mm and a focal length 7100 mm;
  • the echelle mosaic built from two echelle gratings
    (200x250 mm with 37.5 gr mm-1) has a tan qb= 2
    (qb= 63.° 5) blaze angle;
  • the echelle mosaic built from three echelle gratings
    (220x320 mm with 37.5 gr mm-1) has a tan qb= 6
    (qb= 80.° 5) blaze angle;
  • the cross-disperser is a 45° crown prism;
  • the cameras:
    • camera 1 - folded Schmidt ƒ = 450 mm;
    • camera 2 - Schmidt with outer focus ƒ= 875 mm;
    • camera 3 - Schmidt with outer focus ƒ = 1900 mm;
  • detectors:
  • Wright Instruments CCD, 1242x1152 with 22.5 mm pixels

    Mosaic R2   Mosaic R6
Camera (f, mm) 450 875 1900 450
Orders number on CCD 90 90 45 96
Orders length at l 5000 () 70 35 18 26
Linear dispersion at l 5000 (/mm) 2,49 0,33 0,67 0,93
Resolution 43000 80000 180000 120000
Slit width 2" 1" 0,5" 2"

Telescopes Instrumentation
 2m RCC Telescope produced by Carl Zeiss Jena GmbH (Germany)
 Large Horizontal Solar Telescope  
 Zeiss-600 Telescope
 80-cm Telescope
 Small Solar Telescope SEF
 3-camera Coude-Echelle Spectrograph
 High-Speed Two-Channel Stellar Photometer
Activities80-cm Telescope
 Spectral investigations of interstellar clouds, solar analogs, X-ray binary stars, etc.
 Orbit calculation and monitoring of geosynchronous satellites
 Observation and modeling of selected manganese lines in solar spectrum
 Simultaneous observations with the Synchronous Network of Optical Telescopes to study microvariability of stars
  Study of gas and dust in comets
  Photometry and astrometry of the inner satellites of Jupiter and Saturn
 Atmospheric studies