Spectroscopic redshift determination for a sample of distant quasars detected 
by the SRG observatory based on RTT-150 observations. I

Bikmaev, I. F.; Irtuganov, E. N.; Nikolaeva, E. A.; Sakhibullin, N. A.; Gumerov, R. I.; Sklyanov, A. S.; Glushkov, M. V.; Borisov, V. D.; Burenin, R. A.; Zaznobin, I. A.; Krivonos, R.A.; Lyapin, A. R.; Medvedev, P.S.; Meshcheryakov, A. V.; Sazonov, S. Yu.; Sunyaev, R. A.; Khorunzhev, G. A.; Gilfanov, M. R.

doi:10.1134/S1063773720100047

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Spectroscopic redshift determination for a sample of distant quasars detected by the SRG observatory based on RTT-150 observations. I

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Sunyaev, R. A.
High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;

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Gilfanov, M. R.
High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;

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Zitation

Bikmaev, I. F., Irtuganov, E. N., Nikolaeva, E. A., Sakhibullin, N. A., Gumerov, R. I., Sklyanov, A. S., et al. (2021). Spectroscopic redshift determination for a sample of distant quasars detected by the SRG observatory based on RTT-150 observations. I. Astronomy Letters - a Journal of Astronomy and Space Astrophysics, 46(10), 645-657. doi:10.1134/S1063773720100047.

Zitierlink: https://hdl.handle.net/21.11116/0000-0008-2A2B-A

Zusammenfassung

Results of the first spectroscopic observations at the 1.5-m Russian–Turkish telescope for the X-ray sources discovered by the eROSITA telescope onboard the SRG space observatory and identified by the SRGz machine learning system as candidates for distant X-ray quasars are presented. Seven objects have been confirmed as quasars at redshifts z=2.7−4.2 and two sources, which were included in the program of optical observations aimed at testing and adjusting SRGz and had a significant uncertainty in the photometric redshift, have turned out to be Seyfert galaxies at z≈0.6.