Optical Identification and Spectroscopic Redshift Measurements
of 216 Galaxy Clusters from the SRF/eROSITA All-Sky Survey
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Published:2023-11-01
Issue:11
Volume:49
Page:695-716
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ISSN:0320-0108
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Container-title:Письма в Астрономический журнал: Астрономия и космическая астрофизика
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language:
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Short-container-title:Pisʹma v Astronomičeskij žurnal
Author:
Zaznobin I. A.11, Burenin R. A.21, Belinski A. A.1, Bikmaev I. F.13, Gilfanov M. R.24, Dodin A. V.1, Dodonov S. N.5, Eselevich M. V.6, Zheloukhov S. G.1, Irtuganov E. N.3, Kotov S. S.5, Krivonos R. A.2, Lyskova N. S.2, Malygin E. A.5, Meshcheryakova N. А.1, Medvedev P. S.2, Meshcheryakov A. V.2, Moiseev A. V.25, Oparin D. V.5, Potanin S. A.17, Postnov K. A.1, Sazonov S. Yu.2, Safonov B. S.1, Sakhibullin N. A.38, Starobinsky A. A.9, Suslikov M. V.13, Sunyaev R. A.24, Tatarnikov A. M.17, Uskov G. S.2, Uklein R. I.5, Khabibullin I. I.24, Khamitov I. M.38, Khorunzhev G. A.2, Churazov E. M.24, Shablovinskaya E. S.5, Shatsky N. I.1
Affiliation:
1. Sternberg Astronomical Institute, Moscow State University 2. Space Research Institute, Russian Academy of Sciences 3. Kazan Federal University 4. Max Planck Institut fu¨ r Astrophysik 5. Special Astrophysical Observatory, Russian Academy of Sciences 6. Institute of Solar–Terrestrial Physics, Russian Academy of Sciences 7. Faculty of Physics,Moscow State University 8. Academy of Sciences of Tatarstan 9. Landau Institute for Theoretical Physics Russian Academy of Sciences
Abstract
We present the results of the optical identification and spectroscopic redshift measurements of216 galaxy clusters detected in the SRG/eROSITA all-sky X-ray survey. The spectroscopic observationswere performed in 2020–2023 with the 6-m BTA telescope at the Special Astrophysical Observatory ofthe Russian Academy of Sciences, the 2.5-m telescope at the Caucasus Mountain Observatory of theSternberg Astronomical Institute of the Moscow State University, the 1.6-m AZT-33IK telescope atthe Sayan Solar Observatory of the Institute of Solar–Terrestrial Physics of the Siberian Branch of theRussian Academy of Sciences, and the 1.5-m Russian–Turkish telescope (RTT-150) at the TU¨ BI˙ TAKObservatory. For all of the galaxy clusters presented here the spectroscopic redshift measurements havebeen obtained for the first time. Of these, 139 galaxy clusters have been detected for the first time in theSRG/eROSITA survey and 22 galaxy clusters are at redshifts zspec 0.7, including three at zspec 1.Deep direct images with the rizJK filters have also been obtained for four distant galaxy clusters atzspec 0.7. For these observations we chose the most massive clusters and, therefore, most of the galaxyclusters presented here with the spectroscopic redshifts measured by us will most likely enter in future intothe cosmological samples of galaxy clusters from the SRG/eROSITA survey.
Publisher
The Russian Academy of Sciences
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