[STAFF] [INSTRUMENTS] [DATA REDUCTION]
Coude Laboratory is a department of Special Astrophysical Observatory of Russian AS. On the coude focus of 1-m (Zeiss-1000) telescope have installed two echelle spectrometers: CEGS and HELEN. Both spectrometers have been designed by Musaev F.A. and oriented for spectroscopy of relatively bright stars with different spectral resolution. CCD matrixes are used:
Our reduction of the echelle spectra made using the DECH code (Galazutdinov G.A.). This program package allows flat-field division, bias/background subtraction, one-dimensional spectrum extraction from the 2-dimensional images, correction for the diffuse light, spectrum addition, excision of cosmic ray features, etc. The DECH code also allows location of a fiducial continuum, measurements of the line equivalent widths, line positions and shifts, etc.
spectral resolution R~40000, range 3200 - 10100 Angstroms - registered simultaneously with 1242x1152 CCD (see example of CCD image of Solar spectrum, obtained with 1252x1152 CCD - about 100 spectral orders are seen (151Kb jpeg file).
spectral resolution R~80000,
We process the spectral data (CCD images and extracted spectra) using especially written program package DECH