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Optical Spectroscopy of SRG/eROSITA Objects with 2.5-m Telescope at the Caucasus Mountain Observatory of the SAI MSU

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Abstract

Based on observations with the new transient double-beam spectrograph (TDS) at the 2.5-m telescope of the Caucasus Mountain Observatory of SAI MSU, we have determined the types and found the redshifts for six new X-ray sources (four quasars and two galaxy clusters) detected by the SRG space observatory during the Lockman Hole observations at the eROSITA performance verification phase. We show that the TDS allows the spectra of objects \({\sim}20^{m}\) to be taken in 2 h of observations with a signal-to-noise ratio higher than 5 and a resolution \(R\sim 1500\). The types and redshifts of the objects determined from our spectroscopic observations agree well with the predictions based on photometric data using the SRGz automatic classification system.

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Notes

  1. http://lnfm1.sai.msu.ru/kgo/instruments/tds.

  2. http://rcsed.sai.msu.ru

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ACKNOWLEDGMENTS

This study is based on the observations with the eROSITA telescope onboard the SRG observatory. The SRG observatory was produced by Roscosmos in the interest of the Russian Academy of Sciences on behalf of the Space Research Institute within the Russian Federal Scientific Program with the participation of Deutsches Zentrum für Luft- und Raumfahrt (DLR). The SRG/eROSITA X-ray telescope was produced by a consortium of German institutes headed by Max-Planck-Institut für extraterrestrische Physik (MPE) under DLR support. The SRG spacecraft was designed, produced, launched, and is operated by the Lavochkin Research and Production Association and its subcontractors. The scientific data reception is performed by the system of deep space communication antennas in Medvezhi Ozera, Ussuriysk, and Baikonur and is financed by Roscosmos. The eROSITA data used in this paper were processed with the eSASS software developed by the German eROSITA consortium and the software developed by the Russian SRG/eROSITA consortium.

Funding

The TDS creation was financially supported in part by the Program of Development of the Lomonosov Moscow State University and RSF grants 16-12-10519 (red channel) and 17-12-01241 (blue channel). The work of A.V. Dodin, S.A. Potanin, A.A. Belinski, O.V. Egorov, A.M. Tatarnikov, and K.A. Postnov was supported by the Program of Development of the Lomonosov Moscow State University ‘‘Leading Scientific School’’ (‘‘Physics of Stars, Relativistic Objects, and Galaxies’’).

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Authors and Affiliations

  1. Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskii pr. 13, Moscow, 119992, Russia

    A. V. Dodin, S. A. Potanin, N. I. Shatsky, A. A. Belinski, K. E. Atapin, M. A. Burlak, O. V. Egorov, A. M. Tatarnikov & K. A. Postnov

  2. Faculty of Physics, Moscow State University, Moscow, 119991, Russia

    S. A. Potanin & K. A. Postnov

  3. Kazan Federal University, ul. Kremlevskaya 18, Kazan, 420000, Russia

    K. A. Postnov & A. V. Meshcheryakov

  4. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia

    M. I. Belvedersky, R. A. Burenin, M. R. Gilfanov, P. S. Medvedev, A. V. Meshcheryakov, S. Yu. Sazonov, G. A. Khorunzhev & R. A. Sunyaev

  5. Higher School of Economics, National Research University, Myasnitskaya ul. 20, Moscow, 101100, Russia

    M. I. Belvedersky

  6. Max Planck Institut für Astrophysik, Karl-Schwarzschild-Str. 1, Postfach 1317, D-85741, Garching, Germany

    M. R. Gilfanov & R. A. Sunyaev

Authors
  1. A. V. Dodin
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  2. S. A. Potanin
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  3. N. I. Shatsky
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  4. A. A. Belinski
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  5. K. E. Atapin
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  6. M. A. Burlak
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  7. O. V. Egorov
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  8. A. M. Tatarnikov
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  9. K. A. Postnov
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  10. M. I. Belvedersky
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  11. R. A. Burenin
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  12. M. R. Gilfanov
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  13. P. S. Medvedev
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  14. A. V. Meshcheryakov
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  15. S. Yu. Sazonov
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  16. G. A. Khorunzhev
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  17. R. A. Sunyaev
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Corresponding author

Correspondence to A. V. Dodin.

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Translated by V. Astakhov

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Dodin, A.V., Potanin, S.A., Shatsky, N.I. et al. Optical Spectroscopy of SRG/eROSITA Objects with 2.5-m Telescope at the Caucasus Mountain Observatory of the SAI MSU. Astron. Lett. 46, 429–438 (2020). https://doi.org/10.1134/S106377372007004X

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  • DOI: https://doi.org/10.1134/S106377372007004X

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