Search Results - "Oknyanskij, V. L."

Intrinsic quasar variability and time delay determination in the lensed quasar UM673 by Koptelova, E., Oknyanskij, V. L., Artamonov, B. P., Burkhonov, O.

“…We present the results of time delay measurements between the A and B components of the gravitationally lensed quasar UM673. The measurements are based on the…”
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OPTICAL MONITORING OF NGC4151 DURING 110 YEARS by Oknyanskij, V. L., Metlova, N. V., Huseynov, N. A., Guo, Di-Fu, Lyuty, V. M.

“…We present the historical light curve of NGC 4151 for 1906–2016. The light curve (Oknyanskij and Lyuty, 2007) is primarily based on our published photoelectric…”
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THE CHANGING LOOK AGNS MONITORING PROJECT by Oknyanskij, V. L., Huseynov, N. A., Lipunov, V. M., Tatarnikov, A. M., Shatsky, N. I., Tsygankov, S. S., Metlov, V. G., Salmanov, I. R., Gaskell, C. M.

“…The Changing Look AGNs (CL AGNs) are objects which undergo dramatic variability of the emission line profiles and classification type of which can move from…”
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Variable Radio Echoes from a Jet in QSO 0957 + 561. II. Statistical Significance of the Result by Oknyanskij, Vl

“…At the previous publication (Oknyanskij, 1997) we considered and used a new algorithm for time-delay investigations in case when the time delay was a linear…”
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CCD Photometry of QSO 0957+561 A & B for the period 1987-1992 using La Palma archive by Slavcheva-mihova, Ls, Oknyanskij, Vl, Mihov, Bm

“…We present the results of CCD photometry of the first gravitational lenssystem QSO 0957+561, obtained on the base of La Palma archive. Usingcross-correlation…”
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OPTICAL-RADIO TIME DELAYS IN Q0957+561 by V. L. Oknyanskij

“…Applying a specific cross-correlation method, we obtained evidence that changes in the radio flux appear to lag behind the optical variations of the quasar by…”
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ON THE POSSIBILITY FOR MEASURING THE HUBBLE CONSTANT FROM OPTICAL-TO-NIR VARIABILITY TIME DELAY IN AGNS by V. L. Oknyanskij

“…The Optical-to-Near-infrared variability time delay have already been reported for a small number (∼ 7) of AGNs and has been firmly established only for 5 of…”
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Radio-optical variability correlation in QSO 0957+561: evidence for beamed hard radiation by Oknyanskij, V.L.

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Connection between X-ray and optical variability in NGC 4151 by Oknyanskij, V. L.

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Intrinsic quasar variability and time delay determination in the lensed quasar UM673 by Koptelova, E., Oknyanskij, V. L., Artamonov, B. P., Burkhonov, O.

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Time delay between images of the lensed quasar UM673 by Koptelova, E, Chen, W. P, Chiueh, T, Artamonov, B. P, Oknyanskij, V. L, Nuritdinov, S. N, Burkhonov, O, Akhunov, T, Bruevich, V. V, Ezhkova, O. V, Gusev, A. S, Sergeyev, A. A, Ehgamberdiev, Sh. A, Ibragimov, M. A

“…We study brightness variations in the double lensed quasar UM673 (Q0142-100) with the aim of measuring the time delay between its two images. In the paper we…”
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VARIABILITY OF NGC4151 DURING 2008-2013 by V. L. Oknyanskij, N. V. Metlova, B. P. Artamonov, A. V. Lyuty, V. M. Lyuty

“…We present the historical light curve of NGC 4151 for 1906 - 2013 and the detailed light curve for 2008 - 2013 the light curve of NGC 4151 for 2008 - 2013 (our…”
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Intrinsic quasar variability and time delay determination in the lensed quasar UM673 by KOPTELOVA, E, OKNYANSKIJ, V. L, ARTAMONOV, B. P, BURKHONOV, O

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OPTICAL VARIABILITY OF NGC 4151 DURING 100 YEARS by V. L. Oknyanskij, V. M. Lyuty

“…We present historical light curve of NGC 4151 (Fig.1.) for 1906-2007. The light curve include mostly our published photoelectric (taken during the years…”
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Multiwavelength Observations of Short-Timescale Variability in NGC 4151. IV. Analysis of Multiwavelength Continuum Variability by Edelson, R. A., Alexander, T., Crenshaw, D. M., Kaspi, S., Malkan, M. A., Peterson, B. M., Warwick, R. S., Clavel, J., Filippenko, A. V., Horne, K., Korista, K. T., Kriss, G. A., Krolik, J. H., Maoz, D., Nandra, K., O'Brien, P. T., Penton, S. V., Yaqoob, T., Albrecht, P., Alloin, D., Ayres, T. R., Balonek, T. J., Barr, P., Barth, A. J., Bertram, R., Bromage, G. E., Carini, M., Carone, T. E., Cheng, F.-Z., Chuvaev, K. K., Dietrich, M., Dultzin-Hacyan, D., Gaskell, C. M., Glass, I. S., Goad, M. R., Hemar, S., Ho, L. C., Huchra, J. P., Hutchings, J., Johnson, W. N., Kazanas, D., Kollatschny, W., Koratkar, A. P., Kovo, O., Laor, A., MacAlpine, G. M., Magdziarz, P., Martin, P. G., Matheson, T., McCollum, B., Miller, H. R., Morris, S. L., Oknyanskij, V. L., Penfold, J., Perez, E., Perola, G. C., Pike, G., Pogge, R. W., Ptak, R. L., Qian, B.-C., Recondo-Gonzalez, M. C., Reichert, G. A., Rodriguez-Espinoza, J. M., Rodriguez-Pascual, P. M., Rokaki, E. L., Roland, J., Sadun, A. C., Salamanca, I., Santos-Lleo, M., Shields, J. C., Shull, J. M., Smith, D. A., Smith, S. M., Snijders, M. A. J., Stirpe, G. M., Stoner, R. E., Sun, W.-H., Ulrich, M.-H., van Groningen, E., Wagner, R. M., Wagner, S., Wanders, I., Welsh, W. F., Weymann, R. J., Wilkes, B. J., Wu, H., Wurster, J., Xue, S.-J., Zdziarski, A. A., Zheng, W., Zou, Z.-L.

“…For pt.III see ibid., vol.470, no.1, p.349-63 (1996). Combines data from the three preceding papers in order to analyze the multi wave-band variability and…”
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TIME DELAY BETWEEN IMAGES OF THE LENSED QUASAR UM673 by E. Koptelova, W. P. Chen, T. Chiueh, B. P. Artamonov, V. L. Oknyanskij, S. N. Nuritdinov, O. Burkhonov, T. Akhunov, V. V. Bruevich, O. V. Ezhkova, A. S. Gusev, A. V. Sergeyev, Sh. A. Ehgamberdiev, M. A. Ibragimov

“…We study brightness variations in the double lensed quasar UM673 (Q0142-100) with the aim of measuring the time delay between its two images. Methods.. We…”
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ON THE CORRELATION OF IR AND OPTICAL VARIABILITYIN NGC 4151 by V. L. Oknyanskij, V. M. Lyuty, O. G. Taranova, E. A. Koptelova, V. I. Shenavrin

“…We combine all published and new unpublished yet NIR (near infrared) photometrical observations of NGC 4151 which can be used for determination of time delays…”
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Variable radio echoes from a jet in QSO 0957+561 by Oknyanskij, V. L.

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QSO 0957+561 and other large-separated double quasars: some new results and a future observational project by Oknyanskij, V. L

“…We collected from literature the information about large-separated pairs of QSOs, which however once were suspected as gravitationally lensed system. We…”
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New radio observations of QSO 0957+561 confirm optical-to radio time delay by Oknyanskij, V. L

“…In our previous publications have been reported about possible time delay between optical and radio (6 cm) variations in QSO 0957+561 and noted that the result…”
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