Stabilization of the spectrum position in the main stellar spectrograph of the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences

Details Stabilization of the spectrum position in the main stellar spectrograph of the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences Stabilization of the spectrum position in the main stellar spectrograph of the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009astbu..64..106c&link_type=abstract

Astrophysical Bulletin, Volume 64, Issue 1, pp.106-108

Astronomy and Astrophysics

Astrophysics

95.55.Qf

Scientific paper

New results on the stability analysis study of the Main Stellar Spectrograph of the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences when it operated jointly with the CCD detection system on a laboratory source are reported. The spectrum is found to drift along the dispersion direction for several tenths of a pixel (several hundredths of angstrom) over a one-hour time scale. To prevent this drift (i.e., the spectrum shift)—a plane parallel glass plate is mounted; tilt angle of this plate varies as a function of the misalignment between the current and reference spectra of a hollow-cathode tube laboratory source. Operation of the spectrum stabilizer is described. The correction time is of about 1 minute, allowing the position of the spectrum to be maintained to within ±0.0006Å.

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