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20 Result(s)

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  1. Article

    Open Access

    Distribution of Cool Starspots on the Surface of the Red Dwarf V647 Her

    An analysis of photometric observations of the star V647 Her (M3.5V) obtained at the 1.25-m telescope of the Crimean Astrophysical Observatory in 2022 is presented. The presence of a low-amplitude variability ...

    N. I. Bondar’, K. A. Antonyuk, N. V. Pit, I. Yu. Alekseev in Astronomy Reports (2024)

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  2. No Access

    Article

    ASASSN-19fy: Features of a Dwarf Nova in the “Period Gap”

    Photometric studies of the dwarf nova ASASSN-19fy in the “period gap” were carried out in 2020-2021 over 24 nights at the Crimean Astrophysical Observatory of the Russian Academy of Sciences and 3 nights at th...

    O. I. Antonyuk, E. P. Pavlenko, K. A. Antonyuk, N. V. Pit, A. A. Sosnovskij… in Astrophysics (2023)

  3. No Access

    Article

    Chromatic Afterglow of GRB 200829A

    We present the results of our analysis of multiwavelength observations for the long gamma-ray burst GRB 200829A. The burst redshift $$...

    N. S. Pankov, A. S. Pozanenko, P. Yu. Minaev, S. O. Belkin… in Astronomy Letters (2023)

  4. No Access

    Article

    Periodic Variations in the Brightness of the Red Dwarf V647 Her

    Photometric series for the red dwarf V647 Her (M3.5V) obtained from observations in 2019 at the Crimean Astrophysical Observatory and from data in the SuperWASP calalog in 2004-2007 are analyzed. Analysis of t...

    N. I. Bondar, K. A. Antonyuk, N. V. Pit in Astrophysics (2022)

  5. No Access

    Article

    Changes in the Period of Negative Superhumps of Type SU UMa Dwarf Novae. II. NY Her (2017 and 2020)

    Photometric studies of the type SU UMa dwarf nova NY Her were made during 2017 and 2020 at the Crimean Astrophysical Observatory and at the Sanglokh Observatory over a total of 77 nights. These observations co...

    E. P. Pavlenko, A. A. Sosnovskii, K. A. Antonyuk, O. I. Antonyuk… in Astrophysics (2021)

  6. No Access

    Article

    Variations in the Period of Negative Superhumps in SU UMa-Type Dwarf Novae. I. Mn Dra (2012-2017)

    This is a photometric study of the dwarf nova MN Dra made during 2012-2017 on nine telescopes over 152 nights. Overall, the observations covered 4 superoutbursts, 7 normal outbursts and the quiescent state. Th...

    A. S. Sklyanov, E. P. Pavlenko, K. A. Antonyuk, N. V. Pit… in Astrophysics (2020)

  7. No Access

    Article

    Cool Spots on the Surface of the Active Giant PZ Mon

    Based on the multicolor (BVRIJHKL) photometric observations of the active red giant PZ Mon performed for the first time in the winter season of 2017–2018, we have determined the main characteristics of the spotte...

    Yu. V. Pakhomov, V. I. Shenavrin, N. I. Bondar’, K. A. Antonyuk… in Astronomy Letters (2019)

  8. No Access

    Article

    Results of Photometric and Spectroscopic Observations of the Young Variable Star V730 Cep

    We present the results of our photometric (V RI) and spectroscopic observations of the young variable star V730 Cep (MisV1147) classified by Uemura et al. (2004) as a Herbig Be star. Our photometry confirms the c...

    V. P. Grinin, K. A. Antonyuk, I. S. Potravnov, D. Mkrtichian in Astronomy Letters (2018)

  9. No Access

    Article

    NY Ser: Outburst Activity and Multiperiodic Processes in its Various Stages During 2014 and 2016

    Results from observation campaigns for the dwarf nova NY Ser during 2014 and 2016 are presented. Data were obtained on a total of 126 nights in 2014 that include 20 normal outbursts and one superoutburst and o...

    A. S. Sklyanov, E. P. Pavlenko, O. I. Antonyuk, A. A. Sosnovskij… in Astrophysics (2018)

  10. No Access

    Article

    Spotted Surface Structure of the Active Giant PZ Mon

    Based on our photometric observations in 2015–2016 and archival photometric data for the active red giant PZ Mon, we have found the main characteristics of the stellar surface: the unspotted surface temperature T

    Yu. V. Pakhomov, K. A. Antonyuk, N. I. Bondar’, N. V. Pit’, I. V. Reva… in Astronomy Letters (2018)

  11. No Access

    Article

    Photometric Period of the Star PZ Mon

    Results are presented from a search for periodic variations in the brightness and color indices of the active star PZ Mon based on many years of photometric data from 1992 to 2015. The photometric period deriv...

    K. A. Antonyuk, N. I. Bondar’, N. V. Pit’ in Astrophysics (2017)

  12. No Access

    Article

    Polarimetry of the Nova V339 Del

    Polarimetric UBVRI observations of the Nova V339 Del during the 5-108 days following the maximum of the outburst of 2013 reveal a variability in the degree of linear polarization with an amplitude of about 0.2...

    D. N. Shakhovskoy, K. A. Antonyuk, S. P. Belan in Astrophysics (2017)

  13. No Access

    Article

    Polarimetry of the E-type asteroid 64 Angelina

    Results of polarimetric observations of a high-albedo asteroid 64 Angelina obtained in the phase-angle range from 0.8° to 24.3° are presented. The observations were carried out in the period from September 28 ...

    S. V. Zaitsev, N. N. Kiselev, V. K. Rosenbush… in Kinematics and Physics of Celestial Bodies (2014)

  14. No Access

    Article

    Polarimetry of the exoplanet system 51 Pegasi

    Two-year BVRI polarimetric monitoring of the exoplanet system 51 Peg has been carried out, indicating that there is no orbital phase-dependent periodic variability in linear polarization with amplitudes greater t...

    K. A. Antonyuk, D. N. Shakhovskoi, L. V. Ksanfomaliti in Solar System Research (2013)

  15. No Access

    Article

    554 Peraga—an asteroid with unusual polarization properties?

    This paper presents the results of polarization observations of asteroid 554 Peraga obtained with the UBVRI polarimeter using the 1.25 m telescope of the Crimean Astrophysical Observatory down to phase angles ...

    K. A. Antonyuk, N. N. Kiselev in Solar System Research (2012)

  16. No Access

    Article

    Photometric study of the unusual binary system vsx j052807.9 + 725606

    Results are reported from a three color (B, V, and R) photometric study of the recently discovered, unusual binary system VSX J052807.9 + 725606 = USNO-B1.0 1629–0064825. This system is extremely similar to th...

    N. A. Virnina, I. L. Andronov, K. A. Antonyuk in Astrophysics (2011)

  17. No Access

    Article

    UBVRI photometry and polarimetry of the young eclipsing binary EK Cep

    Multicolor photometric and polarimetric observations of the eclipsing binary EK Cep at the Crimean Astrophysical Observatory in 1995 and 2006–2007 are reported. Polarimetric observations were made of stars in ...

    K. A. Antonyuk, A. N. Rostopchina in Astrophysics (2009)

  18. No Access

    Article

    Comet C/2002 T7 (LINEAR): Polarimetric and photometric studies

    We present the results of polarimetric and photometric observations of dynamically new comet C/2002 T7 (LINEAR) at phase angles from 6° to 26°. During the observations, the comet was at a distance of 2.7–1.3 A...

    V. K. Rosenbush, F. P. Velichko, N. N. Kiselev, S. F. Velichko… in Solar System Research (2006)

  19. No Access

    Article

    Modeling the Eclipsing Binary System VW Cygni

    Five color UBVRI photometric and polarimetric measurements of the eclipsing binary VW Cyg are reported. It is shown that in the primary minimum the luminosity is attenuated (at short wavelengths) even after passa...

    K. A. Antonyuk, E. A. Antokhina in Astrophysics (2004)

  20. No Access

    Article

    UBVRI Photometry and Polarimetry of the Eclipsing Binary RY Per

    Results are presented from multicolor photometric and polarimetric studies of the eclipsing binary RY Per during 2001-2003. Light curves in the UBVRI bands are shown. An analysis of the variations in the linear p...

    N. M. Shakhovskoy, K. A. Antonyuk in Astrophysics (2004)