A5039086969- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Galaxies: Formation, Evolution, Phenomena
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
Lomonosov Moscow State University
2020-2021
Kyoto Sangyo University
2020
We present the results of photometric and spectroscopic monitoring campaigns changing look AGN NGC 3516 carried out in 2018 to 2020 covering wavelength range from X-ray optical. The facilities included telescopes CMO SAI MSU, 2.3-m WIRO telescope, XRT UVOT Swift. found that brightened a high state could be classified as Sy1.5 during late spring 2020. have measured time delays responses Balmer He II 4686 lines continuum variations. In case best-characterized broad H-beta line, delay...
We present observations from the short-term intensive optical campaign (from Sep2019 to Jan2020) of changing-look Seyfert NGC 3516. This active galactic nucleus is known have strong variability and has changed its type in past. It been low-activity state since 2013, with some rebrightening end 2015 beginning 2016, after which it remained dormant. aim study photometric spectral 3516 new U- B-bands examine profiles broad emission lines order demonstrate that this object may be entering a...
We report photometric and spectroscopic observations analysis of the 2019 superoutburst TCP J21040470+4631129. This object showed a 9-mag with early superhumps ordinary superhumps, which are features WZ Sge-type dwarf novae. Five rebrightenings were observed after main superoutburst. The spectra during post-superoutburst stage Balmer, He I possible sodium doublet features. mass ratio is derived as 0.0880(9) from period superhump. During third fifth rebrightenings, growing superoutbursts...
A significant number of changing-look active galactic nuclei (CL AGNs) have been identified to date. In this work, we study what happens the X-ray spectrum during CL events. We use example nearby Seyfert named NGC 1566, which has observed by Swift, NuSTAR, XMM-Newton , and Suzaku . applied Comptonization model describe evolution 1566 spectra outbursts compared these results with typical behavior other AGNs identify some differences common properties that will ultimately help us better...
We carried out a search for unknown dwarf novae in public data release of the Zwicky Transient Facility survey and suspected that object ZTF18abdlzhd is SU UMa-type star.Performed multicolor CCD observations permit us to follow its fading from an outburst August entire superoutburst October 2020.The duration 13 days.We detected superhumps with period P = 0. d 06918(3) are characteristic UGSU type stars.