Investigation of the dynamics of the oscillations of the light curve of the γ-burst GRB 240825A
Dmitriev P. B. 1, Dranevich V. A. 2
1Ioffe Institute, St. Petersburg, Russia
2Independent researcher, St. Petersburg, Russia
Email: paul.d@mail.ioffe.ru, v.dranevich@mail.ioffe.ru

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As a result of studying the temporal structure of the light curve of the GRB 240825A γ-ray burst, recorded by Swift satellite equipment in the energy range of 15-350 keV, for the presence of quasi-periodic components, oscillations with periods of 0.384, 0.768, 1.224 and 1.536 s were detected. Moreover the oscillation with a period of 1.536 s turned out to be modulated with the same period. Assuming that the modulation is caused by the relativistic Doppler effect during the orbital motion of the emitting object around a more massive central body, the orbital parameters of the emitting object and the mass of the central body were calculated in the classical approximation. Keywords: periodogramanalysis, quasiperiodicities, model - amplitude-frequency modulation.
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