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201320212023

论文（7）

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1Activity of ET Dra-a Star of FK Com Type

Savanov I. S.,Karpov S. V.,Beskin G. M.,Biryukov A. V.,Bondar S. F.,Ivanov E. A.,Katkova E. V.,Lyapsina N. V.,Perkov A. V.,Sasyuk V. V.,Naroenkov S. A.,Nalivkin M. A.,

Abstract—We present new results of the study of ET Dra—a star of the FK Com type—based on observations carried out at the Zvenigorod Observatory of the Institute of Astronomy of RAS with the help of the FRAM-ORM telescope of the La Palma observatory (Spain) and the broadband optical monitoring system Mini-MegaTORTORA, located on the territory of the SAO RAS. We have studied changes in the shape of the light curve caused by the rotational modulation of a star with spots on its surface and the long-term variability of the star’s brightness. An independent determination of the rotation period of $${{P}_{{{\text{phot}}}}}$$ was carried out using all sets of observations available to us. The increase in the brightness of the star near HJD 2459044 during observations with the FRAM-ORM telescope in all three filters was interpreted by us as a stellar flare. Our flare energy estimates are $$2.8 \times {{10}^{{37}}}$$ , $$1.9 \times {{10}^{{37}}}$$ , and $$1.5 \times {{10}^{{37}}}$$ erg in the $$B$$ , $$V$$ , and $$R$$ wavelength ranges, respectively. Observations with a duration of more than 2200 days, carried out at the SAO RAS, opened up the possibility of analyzing the long-term brightness variability of ET Dra. Evidence was found for the existence of cycles lasting 580 days and 810 days (1.55 and 2.23 years, respectively).

2023Astrophysical Bulletin（2023）引用：2

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2Search and Study of Fast Optical Transients in Wide-Angle Sky Monitoring

N.V. Lyapsina,G.M. Beskin,A. V. Biryukov,E.A. Ivanov,S.V. Karpov,E.V. Katkova,A.V. Perkov,V.V. Sasyuk

2021Proceedings of X All-Russian Scientific Conference &ampquotSystem Synthesis and Applied Synergetics&ampquot

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3A Complex for Multimessenger Observations from Gamma Rays to Radio Range and Neutrinos

I. S. Savanov,V. B. Petkov,G. M. Beskin,L. N. Volvach,I. M. Dzaparova,D. D. Dzhappuev,M. M. Kochkarov,A. N. Kurenya,O. I. Mikhailova,S. A. Naroenkov,M. A. Nalivkin,Y. F. Novoseltsev,

2020GROUND-BASED ASTRONOMY IN RUSSIA 21ST CENTURY Proceedings of the All-Russian Conference

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4Method of Space Objects Primary Detection in the Near-Earth Space Using “accumulation with a Shift” Technology

S. F. Bondar, E. A. Ivanov, A. S. Plakhuta,E. V. Katkova

2019Space Debris Fundamental and Practical Aspects of the Threat

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5Wide-field Optical Monitoring with Mini-MegaTORTORA (MMT-9) Multichannel High Temporal Resolution Telescope

G. M. Beskin,S. V. Karpov,A. V. Biryukov,S. F. Bondar,E. A. Ivanov,E. V. Katkova,N. V. Orekhova,A. V. Perkov,V. V. Sasyuk

We describe the properties of Mini-MegaTORTORA (MMT-9) nine-channel wide-field optical sky monitoring system with subsecond temporal resolution. This instrument can observe sky areas as large as 900 deg2, perform photometry in three filters close to Johnson BV R system and polarimetry of selected objects or areas with 100–300 deg2 sizes. The limiting magnitude of the system is up to V = 11m for 0.1 s temporal resolution, and reaches V = 15m in minute-long exposures. The system is equipped with a powerful computing facility and dedicated software pipeline allowing it to perform automatic detection, real-time classification, and investigation of transient events of different nature located both in the near- Earth space and at extragalactic distances. The objects routinely detected by MMT-9 include faint meteors and artificial Earth satellites.We discuss astronomical tasks that can be solved using MMT-9, and present the results of the first two years of its operation. In particular, we report the parameters of the optical flare detected on June 25, 2016, which accompanied the gamma-ray burst GRB160625B.

2017Astrophysical Bulletin（2017）引用：39

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6Photometric Observations of LO Peg in 2014–2015

I. S. Savanov, V. I. Puzin,E. S. Dmitrienko,S. V. Karpov,G. M. Beskin,A. V. Biryukov,S. F. Bondar,E. A. Ivanov,E. V. Katkova,N. Orekhova,A. V. Perkov,V. V. Sasyuk,

We performed new observations of an ultra-fast rotator of th e spectral class K – the LO Peg star – in SAO RAS in 2014 and in Zvenigorod Observatory of INASAN in 2015. The light curves were used to build the maps of temperature inhomogeneities on the LO Peg surface in order to determine the longitudes corresponding to the location of active regi ons. The obtained measurements suggest the ongoing evolution of movements of active regions and pro bably the cyclic character of such movements. According to our estimations, the area of the sta r surface covered with spots decreases and by now it reached 14% of the total visible area of its surfa ce. New observations of the star in V filter allowed us to specify LO Peg long-term variability cyc les. Based on spectropolarimetric observations of LO Peg the null result for measurements of me an longitudinal component of magnetic field is obtained.

2016Acta Astronomica（2016）引用：23

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7Wide-field Subsecond Temporal Resolution Optical Monitoring Systems for the Detection and Study of Cosmic Hazards

G. M. Beskin,S. V. Karpov,V. L. Plokhotnichenko,S. F. Bondar,A. V. Perkov,E. A. Ivanov,E. V. Katkova,V. V. Sasyuk,A. Shearer

Системы широкоугольного оптического мониторинга субсекундного временнóго разрешения для обнаружения и исследования космических угроз, Бескин Г.М., Карпов С.В., Плохотниченко В.Л., Бондарь С.Ф., Перков А.В., Иванов Е.А., Каткова Е.В., Сасюк В.В., Шерер Э.

2013Physics-Uspekhi（2013）引用：14

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