Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Akhunov, T."'
Autor:
Goicoechea, L. J., Artamonov, B. P., Shalyapin, V. N., Sergeyev, A. V., Burkhonov, O. A., Akhunov, T. A., Asfandiyarov, I. M., Bruevich, V. V., Ehgamberdiev, S. A., Shimanovskaya, E. V., Zheleznyak, A. P.
Publikováno v:
A&A 637, A89 (2020)
Quasar microlensing offers a unique opportunity to resolve tiny sources in distant active galactic nuclei and study compact object populations in lensing galaxies. We therefore searched for microlensing-induced variability of the gravitationally lens
Externí odkaz:
http://arxiv.org/abs/2004.04991
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
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 combine our previously published observational data of UM673 obtained during the 2003 - 2005
Externí odkaz:
http://arxiv.org/abs/1204.5396
Autor:
Tsvetkova, V. S., Vakulik, V. G., Shulga, V. M., Schild, R. E., Dudinov, V. N., Minakov, A. A., Nuritdinov, S. N., Artamonov, B. P., Kochetov, A. Ye., Smirnov, G. V., Sergeyev, A. A., Konichek, V. V., Sinelnikov, I. Ye., Zheleznyak, A. P., Bruevich, V. V., Gaysin, R., Akhunov, T., Burkhonov, O.
We report the results of our multicolor observations of PG 1115+080 with the 1.5-m telescope of the Maidanak Observatory (Uzbekistan, Central Asia) in 2001-2006. Monitoring data in filter R spanning the 2004, 2005 and 2006 seasons (76 data points) de
Externí odkaz:
http://arxiv.org/abs/1004.3443
Autor:
Vakulik, V. G., Shulga, V. M., Schild, R. E., Tsvetkova, V. S., Dudinov, V. N., Minakov, A. A., Nuritdinov, S. N., Artamonov, B. P., Kochetov, A. Ye., Smirnov, G. V., Sergeyev, A. A., Konichek, V. V., Sinelnikov, I. Ye., Bruevich, V. V., Akhunov, T., Burkhonov, O.
We report new estimates of the time delays in the quadruple gravitationally lensed quasar PG1115+080, obtained from the monitoring data in filter R with the 1.5-m telescope at the Maidanak Mountain (Uzbekistan, Central Asia) in 2004-2006. The time de
Externí odkaz:
http://arxiv.org/abs/0910.1260
Autor:
Shalyapin, V. N., Goicoechea, L. J., Koptelova, E., Artamonov, B. P., Sergeyev, A. V., Zheleznyak, A. P., Akhunov, T. A., Burkhonov, O. A., Nuritdinov, S. N., Ullan, A.
We present and analyse new R-band frames of the gravitationally lensed double quasar FBQ 0951+2635. These images were obtained with the 1.5m AZT-22 Telescope at Maidanak (Uzbekistan) in the 2001-2006 period. Previous results in the R band (1999-2001
Externí odkaz:
http://arxiv.org/abs/0905.4484
Autor:
Akhunov, T. A., Schmidt, R. W., Burkhonov, O., Gaynullina, E. R., Gottloeber, S., Mirtadjieva, K., Nuritdinov, S. N., Tadjibaev, I., Wambsganss, J., Wisotzki, L., Bruevich, V. V., Gusev, A. S., Sergeyev, A., Smirnov, G.
The paper has been withdrawn because double checking and comparison with other data sets after the original submission showed that a broken R-band filter at the Maidanak telescope had affected our quasar monitoring observations in the years 2004 and
Externí odkaz:
http://arxiv.org/abs/0802.2778
Autor:
Ullan, A., Goicoechea, L. J., Zheleznyak, A. P., Koptelova, E., Bruevich, V. V., Akhunov, T., Burkhonov, O.
The time delays between the components of a lensed quasar are basic tools to analyze the expansion of the Universe and the structure of the main lens galaxy halo. In this paper, we focus on the variability and time delay of the double system SBS 0909
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601473
Autor:
Vakulik, V., Schild, R., Dudinov, V., Nuritdinov, S., Tsvetkova, V., Burkhonov, O., Akhunov, T.
We present new brightness monitoring observations of the 4 components of gravitationally lensed system Q2237+0305, which show detection of an intrinsic quasar brightness fluctuation at a time of subdued microlensing activity, between June 27 and Octo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509545
Autor:
Gaynullina, E. R., Schmidt, R. W., Akhunov, T., Burkhonov, O., Gottloeber, S., Mirtadjieva, K., Nuritdinov, S. N., Tadjibaev, I., Wambsganss, J., Wisotzki, L.
Publikováno v:
Astron.Astrophys. 440 (2005) 53
We present the results of a monitoring campaign of the double quasar SBS1520+530 at Maidanak observatory from April 2003 to August 2004. We obtained light curves in V and R filters that show small-amplitude \Delta m~0.1 mag intrinsic variations of th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0505489