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High-Resolution Fiber-Fed Spectrograph for the 6-m Telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences: Assessment of Efficiency

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Abstract—We report the results of laboratory tests of the first version of the high-resolution fiber-fed spectrograph designed for the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS). During laboratory tests a spectral resolution of about 70 000 was achieved. The peak efficiency of the entire optical path of the spectrograph (without light losses at the CCD, primary mirror of the 6-m telescope, and in the atmosphere) at 620 nm and with the equivalent slit widths of the 1″.5 and 0″.75 are equal to 8% and 4%, respectively. The resolving power R = 70 000 and 100 000 can be reached with the sky aperture 0″.75 and 0″.4 respectively. In the current version of the spectrograph these regimes of operation are implemented by mechanic aperturing of the slit. A dedicated projecting camera has been developed and is currently manufactured to operate with a collimated 200-mm diameter beam, which will make it possible to increase the spectral resolution up to 100 000. A two-beam image slicer will be used to maintain the luminous efficiency of the instrument at least at the 6% level.

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Funding

The production and investigation of the spectrograph were supported by the Russian Science Foundation (production was funded by project no. 14-5000043, research branch “Exoplanets”), and investigation of the spectral resolution and optical stability of the instrument was funded by project no. 19-7210023, “Search for and investigation of exoplanets and exoplanetary systems”, and assessment of efficiency was funded by project no. 19-72-00127 “Investigation of transit exoplanets of intermediate size”). The development of polarization optics for the spectrograph is funded in part by the Russian Foundation for Basic Research (project no. 18-29-21030). The production of the interferometric unit for the wavelength calibration of the instrument is supported by the Ministry of Science and Education of the Russian Federation (grant no. N14.W03.31.0017). G.G. Valyavin and G.A. Galazutdinov acknowledge Chilean CONICYT foundation (the “International cooperation” program, project REDES 180 136) for the support of their cooperation, in particular, aimed at the development of the program for reduction of spectra obtained with the spectrograph.

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Authors and Affiliations

  1. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Russia

    G. G. Valyavin, F. A. Musaev, A. V. Perkov, V. N. Aitov, V. D. Bychkov, S. V. Drabek, V. S. Shergin, G. A. Galazutdinov, E. V. Emelyanov, G. V. Yakopov, T. E. Burlakova, M. V. Yushkin, A. F. Valeev & D. R. Gadelshin

  2. Crimean Astrophysical Observatory, Russian Academy of Sciences, 298409, Nauchnyi, Russia

    G. G. Valyavin, D. A. Sazonenko & D. E. Kukushkin

  3. St. Petersburg State University, 198504, St. Petersburg, Russia

    G. G. Valyavin

  4. St. Petersburg National Research University of Information Technologies, Mechanics and Optics, 197101, St. Petersburg, Russia

    D. A. Sazonenko & D. E. Kukushkin

  5. Instituto de Astronomia, Universidad Catolica del Norte, 1270709, Antofagasta, Chile

    G. A. Galazutdinov

  6. Main (Pulkovo) Astronomical Observatory, Russian Academy of Sciences, 196140, St. Petersburg, Russia

    G. A. Galazutdinov

  7. Space Research Institute, Russian Academy of Sciences, 117997, Moscow, Russia

    J.-L. Bertaux, A. V. Tavrov & O. I. Korablev

  8. Korea Astronomy and Space Science Institute, 305-348, Daejeon, South Korea

    K.-M. Kim, Inwoo Han & B.-Ch. Lee

Authors
  1. G. G. Valyavin
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  2. F. A. Musaev
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  3. A. V. Perkov
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  4. V. N. Aitov
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  5. V. D. Bychkov
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  6. S. V. Drabek
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  7. V. S. Shergin
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  8. D. A. Sazonenko
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  9. D. E. Kukushkin
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  10. G. A. Galazutdinov
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  11. E. V. Emelyanov
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  12. G. V. Yakopov
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  13. T. E. Burlakova
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  14. J.-L. Bertaux
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  15. A. V. Tavrov
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  16. O. I. Korablev
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  17. M. V. Yushkin
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  18. A. F. Valeev
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  19. D. R. Gadelshin
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  20. K.-M. Kim
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  21. Inwoo Han
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  22. B.-Ch. Lee
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Corresponding author

Correspondence to G. G. Valyavin.

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The authors declare no conflict of interest.

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Translated by A. Dambis

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Valyavin, G.G., Musaev, F.A., Perkov, A.V. et al. High-Resolution Fiber-Fed Spectrograph for the 6-m Telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences: Assessment of Efficiency. Astrophys. Bull. 75, 191–197 (2020). https://doi.org/10.1134/S1990341320020157

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  • DOI: https://doi.org/10.1134/S1990341320020157

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