Catalog of X-Ray Active Galactic Nuclei Based on ROSAT BSC and FSC Sources G. M. ParonyanA. M. MickaelianG. A. Mikayelyan OriginalPaper 29 September 2021 Pages: 277 - 292
Changes in the Period of Negative Superhumps of Type SU UMa Dwarf Novae. II. NY Her (2017 and 2020) E. P. PavlenkoA. A. SosnovskiiA. V. Baklanov OriginalPaper 30 September 2021 Pages: 293 - 305
Active Stage of the Symbiotic Object MWC 560, 2018-2021 L. N. KondratyevaI. V. RevaM. A. Krugov OriginalPaper 29 September 2021 Pages: 306 - 315
Ultraviolet Spectral Behavior of UX Ari with Periodic Flaring Activity M. R. SanadI. ZeadM. A. Abdel-Sabour OriginalPaper 29 September 2021 Pages: 316 - 326
Analysis of Type II and Type III Radio Bursts Associated with SEPs from Non-Interacting/Interacting Radio-Loud CMEs P. Pappa KalaivaniO. PrakashG. Michalek OriginalPaper 29 September 2021 Pages: 327 - 344
Effect of Continuum Scattering on the Statistical and Temporal Characteristics of Spectral Line Formation A. G. Nikoghossian OriginalPaper 29 September 2021 Pages: 345 - 354
Dynamics of a Cosmological Model with a Conformally-Coupled Scalar Field R. M. AvagyanG. H. HarutunyanA. A. Saharian OriginalPaper 29 September 2021 Pages: 355 - 369
Hot Quark Matter with Neutrino Confinement in Terms of the Local Nambu - Jona-Lasinio SU(3) Model G. S. HajyanG. B. Alaverdyan OriginalPaper 29 September 2021 Pages: 370 - 387
Sobolev LVG Analysis of Aminomethanol and N-Methylhydroxylamine: Potential Spectral Lines for Their Detection in a Cosmic Object M. K. SharmaS. Chandra OriginalPaper 30 September 2021 Pages: 388 - 404
Ultraviolet Astronomy: Astrophysical Perspectives of the Spektr-UF Project (WSO-UV) B. M. Shustov REVIEWS 30 September 2021 Pages: 405 - 424
Correction to: Light Curve Analysis of some Eclipsing Binary Systems M. S. AlenaziM. M. Elkateeb Correction 30 September 2021 Pages: 425 - 425
Correction to: Modulation of Galactic Cosmic Rays Due to Magnetic Clouds and Associated Structures in the Interplanetary Space: 1996-2018 M. FadaaqB. Badruddin Correction 30 September 2021 Pages: 426 - 434