Симферополь, Республика Крым, Россия
Россия
Россия
Россия
Россия
Россия
ВАК 1.3.1 Физика космоса, астрономия
УДК 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система
УДК 520.8 Методы и средства наблюдений, измерений и анализа
УДК 524.7 Внегалактические системы
ГРНТИ 41.27 Звездные системы
ГРНТИ 41.17 Астрофизика
ОКСО 03.05.01 Астрономия
ОКСО 03.06.01 Физика и астрономия
ББК 223 Физика
ТБК 61 Физико-математические науки
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
The TESS satellite provides unique data from nearly continuous observations with high temporal resolution. Each sky sector is observed for 27 days. For the blazar S5 1803+784, there are three observing seasons during which the object remains in the TESS field of view for extended periods, approximately 10 months in total. By supplementing these data with multi-band photometric observations from the Zwicky Transient Facility (ZTF) and the AZT-8 telescope at the Crimean Astrophysical Observatory of the Russian Academy of Sciences, we obtain a unique opportunity to study the relation between the shortest characteristic variability timescales and the parameters of long-term variability. Based on this analysis, we conclude that short-term variability is caused by the emergence and evolution of jet regions, whose motion deviates from the general trajectory, and, therefore, they have different Doppler factors. We performed light curve modeling under this assumption and obtained good qualitative agreement with the observations.
active galaxies: blazars; optical variability
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