Contents

Astronomy Letters

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Vol. 48, No. 12, 2022

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The Influence of the Effective Number of Active and Sterile Neutrinos on the Determination of the Values of Cosmological Parameters

P. A. Chernikov and A. V. Ivanchik p. 689  abstract

Observations of Massive Galaxy Clusters from the All-Sky Survey with the eROSITA Telescope Onboard the SRG Space Observatory

R. A. Burenin, I. A. Zaznobin, P. S. Medvedev, M. R. Gilfanov, S. S. Kotov, R. I. Uklein, S. N. Dodonov, A. V. Moiseev, M. V. Eselevich, I. F. Bikmaev, N. S. Lyskova, A. V. Meshcheryakov, K. A. Postnov, S. Yu. Sazonov, A. A. Starobinsky, R. A. Sunyaev, and E. M. Churazov p. 702  abstract

Detection of AGNs and Quasars with Significant Proper Motions Based on Gaia Data in the SRG/eROSITA Catalog of X-ray Sources

I. M. Khamitov, I. F. Bikmaev, M. R. Gilfanov, R. A. Sunyaev, P. S. Medvedev, M. A. Gorbachev, and E. N. Irtuganov p. 724  abstract

Highly Variable Active Galactic Nuclei in the SRG/eROSITA Sky Survey: I. The Constriction of a Sample and the Catalog of Objects Detected in a Low State

P. S. Medvedev, M. R. Gilfanov, S. Yu. Sazonov, R. A. Sunyaev, and G. A. Khorunzhev p. 735  abstract

SRG/eROSITA Survey in the Lockman Hole: Classification of X-ray Sources

M. I. Belvedersky, S. D. Bykov, and M. R. Gilfanov p. 755  abstract

Search for Tidal Disruption Events Based on the SRG/eROSITA Survey with Subsequent Optical Spectroscopy

G. A. Khorunzhev, S. Yu. Sazonov, P. S. Medvedev, M. R. Gilfanov, K. E. Atapin, A. A. Belinski, O. V. Vozyakova, A. V. Dodin, B. S. Safonov, A. M. Tatarnikov, I. F. Bikmaev, R. A. Burenin, S. N. Dodonov, M. V. Eselevich, I. A. Zaznobin, R. A. Krivonos, R. I. Uklein, K. A. Postnov, and R. A. Sunyaev p. 767  abstract

Link between the Optical and Radio Frames from Gaia DR3 Data and VLBI Measurements

V. V. Bobylev p. 790  abstract

Study of the X-ray Pulsar IGR J21343+4738 Based on NuSTAR, Swift, and SRG Data

A. S. Gorban, S. V. Molkov, A. A. Lutovinov, and A. N. Semena p. 798  abstract

Possible Flight Trajectories to Venus with Landing in a Given Region

V. A. Zubko p. 806  abstract

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