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  1. No Access

    Article

    New Value of Apsidal Motion Velocity and Physical Parameters of the Triple Eclipsing System AS Cam

    Applying a new approach to the measurement of the rate of apsidal motion in the system AS Cam ( \(P{{ = 3.43}^{d}}\)

    I. M. Volkov in Astronomy Reports (2023)

  2. No Access

    Article

    Observations of Supernova SN 2018zd

    We present photometric and spectrocsopic observations of SN2018zd, carried out at 9 telescopes, including the 6-m telescope of SAO RAN and the 2.5-m telescope of the Caucasus Mountain Observatory of the Sternb...

    D. Yu. Tsvetkov, V. P. Goranskij, E. A. Barsukova, A. F. Valeev… in Astrophysical Bulletin (2022)

  3. No Access

    Article

    Fast Apsidal Rotation and Physical Parameters of V1103 Cas

    We present the first high accuracy UBV RI(RI)c light curves of poor investigated eclipsing star V1103 Cas = GSC 3682 736 ( $$P{{ = 6.18...

    I. M. Volkov, A. S. Kravtsova in Astronomy Reports (2022)

  4. No Access

    Article

    SN 2019edo: A Type II-P Supernova with a Fast Brightness Rise and a Short Plateau Phase

    We present the results of BVRI photometry for the type II-P supernova (SN) 2019edo in NGC 4162 obtained from April 29, 2019, to January 26, 2020, with several telescopes, including the 60-cm telescope at the Cauc...

    D. Yu. Tsvetkov, A. A. Belinsky, N. P. Ikonnikova, M. A. Burlak… in Astronomy Letters (2022)

  5. Article

    Open Access

    BU CMi as a Quadruple Doubly Eclipsing System

    We found that the known spectroscopic binary and variable BU CMi = HD65241 ( \(V = 6.4{-} {{6.7}^{{\text{m}}}}\) , A0...

    I. M. Volkov, A. S. Kravtsova, D. Chochol in Astronomy Reports (2021)

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  6. No Access

    Article

    The Physical Parameters of V680 Mon—Eclipsing Star with the Highest Known Eccentricity

    We present the first high accuracy UBVRI(RI)c CCD light curves of the poorly investigated eclipsing system V680 Mon = GSC 7428 218 (P = 8.54d, V = 10.02m). They were used to find the photometric solutions and to ...

    I. M. Volkov, A. S. Kravtsova, D. Chochol in Astronomy Reports (2021)

  7. No Access

    Article

    Eclipsing System PS UMa: Evolutionary Status and Physical Parameters of the Components

    We present the first high accuracy UBVRI(RI)c CCD light curves of the newly discovered eclipsing system PS UMa = GSC 4375 1733 (\(P = 9_{·}^{d}27\), \(V = 12_{·}^{m}42\)). The photometric solutions are found, the...

    I. M. Volkov, A. S. Kravtsova in Astronomy Reports (2020)

  8. No Access

    Article

    Physical Parameters of the Eclipsing System V2647 Cyg

    The first high-accuracy CCD UBV RI (RI)C light curves of the recently discovered eclipsing binary V2647 Cyg = GSC 3612 1565 ( ) have been...

    A. S. Kravtsova, I. M. Volkov, D. Chochol in Astronomy Reports (2019)

  9. No Access

    Article

    Physical Parameters of the Eclipsing System V1176 Cas

    The first high-accuracy CCDUBV RI light curves for the recently discovered eclipsing system V1176 Cas (P = 6 . d 33, V = 11 . ...

    L. A. Bagaev, I. M. Volkov, I. V. Nikolenko in Astronomy Reports (2018)

  10. No Access

    Article

    Light Curves of the Type II-P Supernova SN 2017eaw: The First 200 Days

    We present the results of our UBVRI photometry for the type II-P supernova SN 2017eaw in NGC6946 obtained fromMay 14 to December 7, 2017, at several telescopes, including the 2.5-m telescope at the CaucasusHigh-A...

    D. Yu. Tsvetkov, S. Yu. Shugarov, I. M. Volkov, N. N. Pavlyuk… in Astronomy Letters (2018)

  11. No Access

    Article

    Physical parameters of the eclipsing binary V798 Cep

    The first high-accuracy CCD UBV RI(RI)C light curves for the recently discovered eclipsing binary V798 Cep (P = 16 d .08, V = 11 m . 8) are pres...

    I. M. Volkov, D. Chochol, A. S. Kravtsova in Astronomy Reports (2017)

  12. No Access

    Article

    SN2015bh in NGC 2770: LBV core collapse in merging of binary system components

    We present spectroscopy and multicolor photometry for the optical transient PSN J09093496+3307204 in the galaxy NGC2770, which has afterwards been transferred into the supernova phase and got the name SN2015bh...

    V. P. Goranskij, E. A. Barsukova, A. F. Valeev, D. Yu. Tsvetkov… in Astrophysical Bulletin (2016)

  13. No Access

    Article

    Photometric observations of the supernova 2009nr

    We present the results of our UBVRI CCD photometry for the second brightest supernova of 2009, SN 2009nr, discovered during a sky survey with the telescopes of the MASTER robotic network. Its light and color curv...

    D. Yu. Tsvetkov, P. V. Balanutsa, V. M. Lipunov, I. M. Volkov… in Astronomy Letters (2011)

  14. No Access

    Article

    Multiplicity and apsidal motion in the eclipsing binary EQ Boo

    We present the first estimates of the relative and absolute parameters of the eclipsing binary EQ Boo based on a light-curve analysis (P = 5.43d, V = 8.8 m ). This star is simult...

    I. M. Volkov, N. S. Volkova, I. V. Nikolenko, D. Chochol in Astronomy Reports (2011)

  15. No Access

    Article

    Physical parameters and orbit of the eclipsing binary BD +66 1663 = GSC 4479 412

    We have obtained the first UBV(RI) C photoelectric light curves of the recently discovered eclipsing binary BD +66 1663 = GSC 4479 412 (P = 7.04d, V = 10.14). We have derived re...

    I. M. Volkov, N. S. Volkova, D. Chochol in Astronomy Reports (2010)

  16. No Access

    Article

    The physical parameters and orbit of the eclipsing binary system GSC 4596 1254 = SAO 3282

    We have obtained the first U BV R photoelectric light curves for a recently discovered eclipsing binary with a period of 9.33 d and an appreciable eccentricity (e = 0.08). We ha...

    I. M. Volkov, N. S. Volkova in Astronomy Reports (2009)

  17. No Access

    Article

    Apsidal motion in the eclipsing binary GG Ori

    High-precision WBVR photoelectric observations of the eclipsing binary GG Ori (B9.5V+B9.5V), which has an eccentric orbit (e=0.22), were carried out in 1988–2001 at the Moscow and high-altitude Tian-Shan Observat...

    I. M. Volkov, Kh. F. Khaliullin in Astronomy Reports (2002)