Contact

All Stories

  1. Multiwavelength monitoring and reverberation mapping of NGC 2617 at deepest minimum with a sharp upward turn during 2021–2024

    Article • Monthly Notices of the Royal Astronomical Society, December 2024, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  2. Interpretation of IR variability of AGNs in the hollow bi-conical dust outflow model

    Article • Proceedings of the International Astronomical Union, December 2023, Cambridge University Press

    Dr. Victor L'vovoch Oknyansky

  3. Long-term multiwavelength monitoring and reverberation mapping of NGC 2617 during a changing-look event

    Article • Monthly Notices of the Royal Astronomical Society, August 2023, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  4. Changing looks of the nucleus of the Seyfert galaxy NGC 1566 compared with other changing‐look AGNs

    Article • Astronomische Nachrichten, November 2021, Wiley

    Dr. Victor L'vovoch Oknyansky

  5. Multiwavelength monitoring and reverberation mapping of a changing look event in the Seyfert galaxy NGC 3516

    Article • Monthly Notices of the Royal Astronomical Society, April 2021, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  6. Changing Looks of the Nucleus of Seyfert Galaxy NGC 3516 during 2016–2020

    Article • Astronomy Reports, December 2020, Pleiades Publishing Ltd

    Dr. Victor L'vovoch Oknyansky

  7. The post-maximum behaviour of the changing-look Seyfert galaxy NGC 1566

    Article • Monthly Notices of the Royal Astronomical Society, June 2020, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  8. A flare in the optical spotted in the changing-look Seyfert NGC 3516

    Article • EAS Publications Series, May 2020, EDP Sciences

    Dr. Victor L'vovoch Oknyansky

  9. Variability and the Size–Luminosity Relation of the Intermediate-mass AGN in NGC 4395

    Article • The Astrophysical Journal, April 2020, American Astronomical Society

    Dr. Victor L'vovoch Oknyansky

  10. DISCOVERY OF MORE CHANGING LOOK EVENTS IN NGC 1566

    Article • Odessa Astronomical Publications, November 2019, Odesa I.I. Mechnikov National University

    Dr. Victor L'vovoch Oknyansky

  11. Discovery of new changing look in NGC 1566

    Article • Proceedings of the International Astronomical Union, October 2019, Cambridge University Press

    Dr. Victor L'vovoch Oknyansky

  12. Supernova 2018aoq and a distance to Seyfert galaxy NGC 4151

    Article • Monthly Notices of the Royal Astronomical Society, May 2019, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  13. The Relative Wavelength Independence of IR Time Lags in NGC 4151 during the Years 2010–2015

    Article • Astronomy Letters, April 2019, Pleiades Publishing Ltd

    Dr. Victor L'vovoch Oknyansky

  14. New changing look case in NGC 1566

    Article • Monthly Notices of the Royal Astronomical Society, November 2018, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  15. ADDITIONAL SUPPORT FOR RELATIVE WAVELENGTH INDEPENDENCE OF IR LAGS IN NGC 4151 OVER THE PAST DECADE

    Article • Odessa Astronomical Publications, October 2018, Odesa I.I. Mechnikov National University

    Dr. Victor L'vovoch Oknyansky

  16. ULTI-WAVELENGTH MONITORING OF THE CHANGING-LOOK AGN NGC 2617 DURING STATE CHANGES

    Article • Odessa Astronomical Publications, November 2017, Odesa I.I. Mechnikov National University

    Dr. Victor L'vovoch Oknyansky

  17. The curtain remains open: NGC 2617 continues in a high state

    Article • Monthly Notices of the Royal Astronomical Society, January 2017, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  18. OPTICAL MONITORING OF NGC4151 DURING 110 YEARS

    Article • Odessa Astronomical Publications, December 2016, Odesa I.I. Mechnikov National University

    Dr. Victor L'vovoch Oknyansky

  19. THE CHANGING LOOK AGNS MONITORING PROJECT

    Article • Odessa Astronomical Publications, December 2016, Odesa I.I. Mechnikov National University

    Dr. Victor L'vovoch Oknyansky

  20. Determining the time delays in the gravitational lens PG 1115+080

    Article • Astronomy Reports, January 2015, Pleiades Publishing Ltd

    Dr. Victor L'vovoch Oknyansky

  21. Correlation of near-infrared and optical variability of NGC 4151 in 2008–2013

    Article • Astronomy Letters, September 2014, Pleiades Publishing Ltd

    Dr. Victor L'vovoch Oknyansky

  22. Time delay between images of the lensed quasar UM673

    Article • EAS Publications Series, July 2012, EDP Sciences

    Dr. Victor L'vovoch Oknyansky

  23. Intrinsic quasar variability and time delay determination in the lensed quasar UM673

    Article • Monthly Notices of the Royal Astronomical Society, February 2010, Oxford University Press (OUP)

    Dr. Victor L'vovoch Oknyansky

  24. Optical Observations of Lensed Quasars: Multiwavelength Correlations and Interband Time Delays

    Article • The Open Astronomy Journal, January 2010, Bentham Science Publishers

    Dr. Victor L'vovoch Oknyansky

  25. Determining time delay in the gravitationally lensed system QSO2237+0305

    Article • EAS Publications Series, May 2006, EDP Sciences

    Dr. Victor L'vovoch Oknyansky

  26. Optical spectral variability of NGC 4151 during 1990

    Article • Astronomical and Astrophysical Transactions, August 1997, Taylor & Francis

    Dr. Victor L'vovoch Oknyansky

  27. Optical-to-Radio Time Delay in the Gravitationally Lensed QSO 0957+561

    Article • January 1997, Springer Science + Business Media

    Dr. Victor L'vovoch Oknyansky

  28. Multiwavelength Observations of Short-Timescale Variability in NGC 4151. I. Ultraviolet Observations

    Article • The Astrophysical Journal, October 1996, American Astronomical Society

    Dr. Victor L'vovoch Oknyansky

  29. Multiwavelength Observations of Short-Timescale Variability in NGC 4151. IV. Analysis of Multiwavelength Continuum Variability

    Article • The Astrophysical Journal, October 1996, American Astronomical Society

    Dr. Victor L'vovoch Oknyansky

  30. Variable radio echoes from a jet in QSO 0957+561

    Article • Astrophysics and Space Science, January 1996, Springer Science + Business Media

    Dr. Victor L'vovoch Oknyansky

  31. Connection between X-ray and optical variability in NGC 4151

    Article • Astrophysics and Space Science, December 1994, Springer Science + Business Media

    Dr. Victor L'vovoch Oknyansky

  32. Time delay determination for the first gravitational lens Q0957+561 A,B

    Article • Springer Science + Business Media

    Dr. Victor L'vovoch Oknyansky