aat Acta Astrophys. Tau. Acta Astrophysica Taurica 2712-925X Kiselev Nikolai Nikolaevich, Mosсow, settlement Moskovskii, Tat'yanin Park Str., 12, Moscow, Russia. RU 81 Magnetism and Activity of the Sun - 2022 Conference proceedings Analysis and processing technique for the spectra of pulsations of radio, optical and X-ray radiation of the 2015 solar flare Kupryakov Yurii Gorshkov Aleksei Kashapova Larisa Barta Miroslav Astronomical Institute ASCR, Fričova 298, Ondřejov 251 65, Czech Republic; Sternberg Astronomical Institute, Moscow State University, Universitetsky pr. 13, Moscow 119234, Russia Sternberg Astronomical Institute, Moscow State University, Universitetsky pr. 13, Moscow 119234, Russia Institute of Solar-Terrestrial Physics SB RAS, Irkutsk 6640333, Russia Astronomical Institute ASCR, Fričova 298, Ondřejov 251 65, Czech Republic 23 06 2024 5 2 34 36 17 06 2024 Copyright (c) 2026 Kupryakov Y., Gorshkov A., Kashapova L., Barta M. 2026 Yurii Kupryakov, Aleksei Gorshkov, Larisa Kashapova, Miroslav Barta The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License. Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

The work is devoted to the search for quasi-periodic oscillations in the emission of solar flares based on observations in the H CaII, Hβ, Hα, IR CaII 8542 Å chromospheric lines (spectrograph HSFA-2, Ondrejov), which are formed under the influence of many parameters such as temperature, density, motion of matter, which change in wide ranges. After processing the spectra and spectroheliograms, including the RHESSI and RT3 data in the X-ray and radio bands (3 GHz), respectively, oscillation periods close to each other with characteristic values of 1–2 min were revealed. Presumably 5-minute oscillations have also been found in radio and X-ray emission.

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