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(Researcher. Graduated from the Odessa State University (OSU) in 1982, Ph.D. 1986, MSU)
A member of EAS.
My general research interest include several fields:
1) Extragalactic astronomy, active nucleus of galaxies (AGNs), spectral
and photometrical observations of AGNs.
2) Observational cosmology, gravitational lensing.
3) Statistical analysis of astronomical time series.
Projects I am currently working on include:
(2) First Plenary Meeting of European Astronomical Society (EAS) "The
Impact of Space Research on Astronomy", Liege, Belgium, 18-28 June 1992.
(3) 31st Liege International Astrophysical Colloquium "Gravitational
Lenses in Universe", Liege, Belgium, June 21-29, 1993
(4) IAU Symposium No. 159, "Multi-Wavelength Continuum Emission of AGN",
Geneva, Switzerland, 30 August - 9 September, 1993.
(5) International Symposium "New Horizon of X-Ray Astronomy -
First Results from ASCA", Tokyo, Japan, March 5-14, 1994.
(6) Invited lecturer for international astrophysical school, ``ROZHEN'94`,
Rozhen, Bulgaria, 18-29 April, 1994.
(7) IAU Symposium 173 "Astrophysical Applications of Gravitational Lensing",
(University of Melbourne, Australia, July 6-20, 1995). Also was invited
to make reports for the scientific seminars of AAO and ASAF in Sydney.
(8) International ASCA symposium "X-ray Imaging and Spectroscopy of
Cosmic Hot Plasmas", Tokyo, Japan, 10-17 March 1996.
(9) International conference "Blazars, black holes and jets", Girona,
Spain, 7-14 September, 1996
(10) International conference "Astronomical Data Analysis Software and
System VI", Charlottesville, Virginia, USA, 20-31 September 1996. Also
was invited to make reports for the Astrophysical seminar of Pennstate
University, State College.
(11) International conference "Astronomical Time Series", Tel Aviv,
Israel, 27 December 1996 - 3 January 1997.
(12) International conference "Astronomical Data Analysis Software and
System VII", Sonthofen, Germany, 12-19 September 1997.
(13) International ASCA Symposium "Heating and acceleration in the Universe",
Tokyo, Japan, 15-23 March 1999.
(14) The Universe of Gamov: Original ideas in astrophysics and cosmology",
Odessa, Odessa, August 16-21, 1999 Ukraine, 19-23 August, 1999.
(2) Lyutyi V.M., Oknyanskij V.L. 1987. The Time-amplitude Characteristics
of the Optical Variability of NGC4151 in 1906-1984," Sov. Astron. 31, 245.
(3) Oknyanskij V.L.,Chuvaev K.K., Shakhovskoj N.M. 1988. The Experience
of Parallel Photoelectric and Photographic Spectral Observation of the
Coronal line [FeX] at Galaxy NGC4151 Nucleus Carried out at AZT-11 and
2,6-m Telescope," Bull. Crimean Astropys. Obs. 78, 88.
(4) Chuvaev K.K., Oknyanskij V.L. 1989. "Spectral Variability of the
Nucleus of NGC4151 in 1972-1984," Sov. Astron. 33,1.
(5) Oknyanskij V.L. 1989."Rapid Variability of Coronal Lines and the
Structure of the Emission Line Region in Active Galactic Nuclei," Soobsh.
Spets. Astrofiz. Obs. 61, 70.
(6) Oknyanskij V.L., Lyuty V.M., Chuvaev K.K. 1991 "NGC 4151 after the
Deep Minimum of 1984," Sov. Astron. Lett. 17 ,100.
(7) Beskin G.M., Oknyanskij V.L. 1992. "The Time Delay Determination
for the First Gravitational Lens Q0957+561 A,B," in Gravitational Lens,
Eds R.Kayzer, T.Schramm,S.Refsdal, in Springers Lecture Notes in Physics
ser. 406, p.67.
(8) Oknyanskij V.L., Beskin G.M. 1993."Optical-optical and optical-radio
time delays in Q0957+561 A&B, size of the radio source and microlensing",
Proceeding of 31st Liege International Astophys. Coll. "Gravitational Lenses
in Universe", p. 65.
(9) Oknyanskij V.L. 1994, "Optical-radio time delays in Q0957+561",
Odessa Astronomical Publ., V.7, P.2, p.163.
(10) Oknyanskij V.L., Lyuty V.M., Chuvaev K.K. 1994, "Spectral variability
of NGC4151 during 1972-1991" in: Proceedings of IAU Symp. No.159 "Multi-Wavelength
Continuum Emission of AGN, IAU Symp. 159, p.401, Kluwer Acad. Publ. Dordrecht.
(11) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability
in NGC4151", in Proceedings of Int. Conf. "New Horizon of X-Ray Astronomy-First
Results from ASCA", p.587, ed. H.Makino and T.Ohashi, Tokyo Metropolitan
University. Pub. Univ. Acad. Press., 1994.
(12) Oknyanskij V.L. 1994, "Connection between X-ray and optical variability
in NGC4151", Astrophys. and Space Science, 222, p.157.
(13) Beskin G.M., Oknyanskij V.L., 1995, "The optical time delay in
the double quasar Q0957+561 A,B", Astron. and Astrophys., 304, p.341.
(14) Oknyanskij V.L., van Groningen E., 1997, "Optical spectral variability
of NGC4151 in 1990", Astronomical and Astrophys. Transactions, 14, p.105.
(14) Oknyanskij V.L., van Groningen E., 1995, "Optical spectral variability
of NGC4151 during a strong dip of X-ray covering factor in 1990", In: X-ray
imaging and spectroscopy of cosmic hot plasmas, Frontiers Science Ser.
No 19, p.277
(15) Oknyanskij V.L., 1995, "Why is the ``time delay controversy in
Q0957+561 not yet decided''?", Proceeeding of IAU Sym. 173, Melbourne,
In:"The Astrophysics of Gravitational ...", Kluwer.
(16) Grenshaw D.M. et al., 1996, "Multiwavelength observations of short
time-scale variability in NGC 4151. I. Ultraviolet Observations, Astrophys.
Journal, 470, p.322.
(17) Edelson R.A. et al., 1996, "Multiwavelength observations of short
time-scale variability in NGC 4151. IV. Analysis of multiwavelength continuum
variability", Astrophys. Journal, 470, p.364.
(18) Oknyanskij V.L., 1997, "Determination of variable time delay in
uneven data sets", in ASP Conf. Ser., 1997, 125, p.162.
(19) Oknyanskij V.L.,1997, "Variable radio echoes from a jet in QSO
0957+561", Astrophys. and Space Science, 246, p.299.
(20) Oknyanskij V.L., 1997 "Optical-to-radio time delay in the gravitationally
lensed QSO 0957+561", in Astronomical Time Series, eds. D.Maoz et al.,
Kluwer Acad. Pub., Netherlands, p. 239.
(21) Oknyanskij V.L.,1998, "Metodology of time delay change determination
for unevent data sets", in ASP Conf. Ser., 145, p.488.
(22) Oknyanskij V.L., 1999, "Variable Radio Echoes from a Jet in QSO
0957+561. II. Monte-Carlo Simulations for Estimation of the Significance",
1998, Astrophys. and Space Science, 259, p.295.
(23) Oknyanskij V.L. Lyuty V.M., Taranova O.G., and Shenavrin V.I., 1999,"Correlation between the infrared and
optical variations of MGC4151 in 30 years: change in sizes of the infrared
source", Astronomy Letters, 25, p. 483.
I can offer you a program MCCF for
time delay determinations using irregular spaced data sets.
(see references 11,23). Please, use my E-mail
This page was accessed
(1) Theoretical and observational research on spectral and photometrical
variability of AGNs.
(2) Searching of correlations between X-ray, UV, optical, near IR and
radio variability of AGNs.
(3) Developing and programing of statistical methods for time delay
determination from uneven observational data sets with applications to
AGNs and Gls.
(4) Optical monitoring of QSOs, AGNs and GLs (in collaboration with
Dr. B.Artamonov).
(5) Project supported by Roal Society of UK "Echo Sounding of Quasars"
(In collaboration with Prof. K.Horn).
ACTIVE PARTICIPATION IN INTERNATIONAL CONGRESSES
(1) International Symposium "Gravitational Lens", Hamburg, Germany, 1-10
September 1991.
REPORTS AND WORK ABROAD
REFERENCES ON MOST IMPORTANT PUBLICATIONS
(1) Lyutyi V.M. Oknyanskij V.L., Chuvaev K.K. 1984. "NGC4151- Sy2 in a
deepest photometrical minimum," Sov. Astron. Lett., 10, 335
for the request: oknyan@sai.msu.ru
E-mail: oknyan@sai.msu.ru
times since November 22th, 1999.