Contents
Astronomy Letters
Vol. 49, No. 11, 2023
Optical Identification and Spectroscopic Redshift Measurements of 216 Galaxy Clusters from the SRG/eROSITA All-Sky Survey
I. A. Zaznobin, R. A. Burenin, A. A. Belinski, I. F. Bikmaev, M. R. Gilfanov, A. V. Dodin, S. N. Dodonov, M. V. Eselevich, S. F. Zheltoukhov, E. N. Irtuganov, S. S. Kotov, R. A. Krivonos, N. S. Lyskova, E. A. Malygin, N. A. Maslennikova, P. S. Medvedev, A. V. Meshcheryakov, A. V. Moiseev, D. V. Oparin, S. A. Potanin, K. A. Postnov, S. Yu. Sazonov, B. S. Safonov, N. A. Sakhibullin, A. A. Starobinsky, M. V. Suslikov, R. A. Sunyaev, A. M. Tatarnikov, G. S. Uskov, R. I. Uklein, I. I. Khabibullin, I. M. Khamitov, G. A. Khorunzhev, E. M. Churazov, E. S. Shablovinskaya, and N. I. Shatsky p. 599 abstract
X-ray Properties of the Luminous Quasar PG 1634+706 at $z=1.337$ from SRG and XMM-Newton Data
G. S. Uskov, S. Yu. Sazonov, M. R. Gilfanov, I. Yu. Lapshov, and R. A. Sunyaev p. 621 abstract
Origin of Broad He II 4686 Å Emission in Early Spectra of SNe IIP
N. N. Chugai and V. P. Utrobin p. 639 abstract
SRGz: Classification of eROSITA Point X-ray Sources in the 1${\%}$DESI Region and Calibration of Photometric Redshifts*
A. V. Meshcheryakov, G. A. Khorunzhev, S. A. Voskresenskaya, P. S. Medvedev, M. R. Gilfanov, and R. A. Sunyaev p. 646 abstract
SRG/ART-XC Galactic Plane Survey near Galactic Longitude $\boldsymbol{L\simeq 20^{\circ}}$: Catalog of Sources
D. I. Karasev, A. N. Semena, I. A. Mereminskiy, A. A. Lutovinov, R. A. Burenin, R. A. Krivonos, S. Yu. Sazonov, V. A. Arefiev, M. V. Buntov, I. Yu. Lapshov, V. V. Levin, M. N. Pavlinsky, A. Yu. Tkachenko, and A. E. Shtykovsky p. 662 abstract
New Interstellar Extinction Maps Based on Gaia and Other Sky Surveys
G. A. Gontcharov, A. A. Marchuk, M. Yu. Khovrichev, A. V. Mosenkov, S. S. Savchenko, V. B. Il’in, D. M. Poliakov, and A. A. Smirnov p. 673 abstract
Investigation of the Disk of the Be Star in the High-Mass X-ray Binary IGR J21343+4738
E. A. Nikolaeva, I. F. Bikmaev, E. N. Irtuganov, M. A. Gorbachev, M. V. Suslikov, R. I. Gumerov, and N. A. Sakhibullin p. 697 abstract
Nature of the Eclipsing Polar 1RXS J184542.4$+$483134
V. Yu. Kochkina, A. I. Kolbin, N. V. Borisov, and I. F. Bikmaev p. 706 abstract
Theoretical Period–Radius and Period–Luminosity Relations for Mira Variables with Solar Metallicity
Yu. A. Fadeyev p. 722 abstract
Expansion of the Soft X-ray Source and ‘‘Magnetic Detonation’’ in Solar Flares
A. B. Struminsky, A. M. Sadovski, and I. Yu. Grigorieva p. 731 abstract
A Method for Estimating the Spatial Period of Energy Release in Solar Flares
L. S. Ledentsov p. 744 abstract
Origin of the Near-Surface Shear Layer of Solar Rotation
L. L. Kitchatinov p. 754 abstract
Calculation of the Flux and Charge Ratio of High-Energy Atmospheric Muons at Sea Level*
A. B. Bouasla and R. Attallah p. 762 abstract
The Thermonuclear Rate of ${}^{\mathbf{9}}\mathbf{Be}$($\mathbf{p}$, $\boldsymbol{\gamma}$)${}^{\mathbf{10}}$B Reaction by Using the Modified Potential Model*
Leila Asgari, Hossein Sadeghi, and Hassan Khalili p. 767 abstract