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Method "Spectroscopy with the Main Stellar Spectrograph (MSS) of the BTA". Responsible for the method: Semenko Evgeny, PhD (E-mail for responsible for the method. Turn on the images!)


Main Stellar Spectrograph of the BTA

1. General Description

General view of the N2 column of the BTA and the schema of the MSS spectrographGeneral view of the N2 column of the BTA and the schema of the MSS spectrograph
Fig. 1. General view of the N2 column of the BTA and the schema of the MSS spectrograph.

Fig. 1. General view of the N2 column of the BTA and the schema of the MSS spectrograph.

The MSS of the 6-m BTA telescope is a long-slit spectrograph, stationary installed in the rack of the Nasmyth-2 focus (Vasiliev et al. 1977, Panchuk 2001, Fig. 1). The main purpose of the instrument is the acquisition of one-order spectra of bright point-like and extended objects.

Design, engineering and manufacturing of the spectrograph were carried out in parallel with the creation of the BTA telescope. Thus, the MSS is the oldest operating instrument of the 6-m telescope. During its entire operational lifetime, the main components of the spectrograph have experienced several stages of modernisation (Panchuk 2001). Currently, the spectrograph is used primarily coupled with the circular polarization analyzer for the studies of stellar magnetic fields (e.g., Kudryavtsev et al. 2006).

In the polarimetry mode the observations of stars up to the 12 stellar magnitude are possible, recording a 500 Å-wide spectral region at a time with an average resolution of λ/Δλ = 15000.

Literature

  • Vasiliev A.S., Yevzerov A.M., Lobachev M.V., Peysahson I.V. Optiko-mekhanicheskaya promyshlennost, 2, 31 (1977) (in Russian).
  • Panchuk V.E., SAO Preprint № 154 (2001) (in Russian).
  • BTA telescope. Technical description. Book 4. The main stellar spectrograph, Leningrad: LOMO (1974) (in Russian).
  • Kudryavtsev D.O., Romanyuk I.I., Elkin V.G., Paunzen E. MNRAS, 372, 1804 (2006)