Vol. 49, No. 3, 2023

Astronomy Letters

Chromatic Afterglow of GRB 200829A

N. S. Pankov, A. S. Pozanenko, P. Yu. Minaev, S. O. Belkin, A. A. Volnova, I. V. Reva, A. V. Serebryanskii, M. A. Krugov, S. A. Naroenkov, A. O. Novichonok, A. A. Zhornichenko, V. V. Rumyantsev, K. A. Antonyuk, Sh. A. Egamberdiev, O. A. Burkhonov, E. V. Klunko, A. S. Moskvitin, I. E. Molotov, and R. Ya. Inasaridze p. 81 abstract

Determination of the Spiral Pattern Speed in the Galaxy from Three Samples of Stars

V. V. Bobylev and A. T. Bajkova p. 110 abstract

First Adiabatic Invariant and the Brightness Temperature of Relativistic Jets

V. S. Beskin, T. I. Khalilov, and V. I. Pariev p. 119 abstract

Optical Study of the Polar BM CrB in a Low State

A. I. Kolbin, N. V. Borisov, A. N. Burenkov, O. I. Spiridonova, I. F. Bikmaev, and M. V. Suslikov p. 129 abstract

High-precision Astrometric Observations of the SRG Space Observatory with RTT-150 for Orbit Correction Control

I. M. Khamitov and I. F. Bikmaev p. 141 abstract

Contents

Astronomy Letters