TIME DELAY BETWEEN IMAGES OF THE LENSED QUASAR UM673

Автор(и)

  • E. Koptelova Astronomical observatory of Odessa National University, Odessa, Ukraine, Тайвань
  • W. P. Chen Graduate Institute of Astronomy, National Central University, Jhongli City, Taiwan, Тайвань
  • T. Chiueh Department of Physics, National Taiwan University, Taipei, Taiwan, Тайвань
  • B. P. Artamonov Sternberg Astronomical Institute (SAI), Moscow M.V. Lomonosov State University, Moscow, Russia, Російська Федерація
  • V. L. Oknyanskij Sternberg Astronomical Institute (SAI), Moscow M.V. Lomonosov State University, Moscow, Russia, Російська Федерація
  • S. N. Nuritdinov Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences, Tashkent, Uzbekistan, Узбекистан
  • O. Burkhonov Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences, Tashkent, Uzbekistan, Узбекистан
  • T. Akhunov Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences, Tashkent, Uzbekistan; Institut d'Astrophysique et de Geophysique, Universite de Liege, Allee du 6 Aout 17, Sart Tilman, B5c, 4000 Liege, Belgium, Узбекистан
  • V. V. Bruevich Sternberg Astronomical Institute (SAI), Moscow M.V. Lomonosov State University, Moscow, Russia, Російська Федерація
  • O. V. Ezhkova Sternberg Astronomical Institute (SAI), Moscow M.V. Lomonosov State University, Moscow, Russia, Російська Федерація
  • A. S. Gusev Sternberg Astronomical Institute (SAI), Moscow M.V. Lomonosov State University, Moscow, Russia, Російська Федерація
  • A. V. Sergeyev Institute of Radio Astronomy, Krasnoznamennaya 4, 61002 Kharkov, Ukraine, Україна
  • Sh. A. Ehgamberdiev Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences, Tashkent, Uzbekistan, Узбекистан
  • M. A. Ibragimov Ulugh Beg Astronomical Institute of the Uzbek Academy of Sciences, Tashkent, Uzbekistan, Узбекистан

DOI:

https://doi.org/10.18524/1810-4215.2012.25.83310

Анотація

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 analyzed the V, R and I-band light curves of the A and B images of UM673, which cover ten observational seasons from August 2001 to November 2010. We also analyzed the time evolution of the difference in magnitudes (flux ratio) between images A and B of UM673 over more than ten years. We find that the quasar exhibits both short-term (with an amplitude of ~ 0.1 mag in the R band) and long-term (with an amplitude of ~ 0.3 mag) variability on timescales of about several months and several years, respectively. These brightness variations are used to constrain the time delay between the images of UM673. From a cross-correlation analysis of the A and B quasar light curves and an error analysis we measure a mean time delay of 89 days with an rms error of 11 days.

Посилання

Dudinov V., Bliokh P., Paczynski B. et al.: 2000, Kinematika i fizika nebesnyh tel, 3, 170.

Koptelova, E., Shimanovskaya E., Artamonov B.: 2005, MNRAS, 356, 323.

Koptelova E. et al.: 2012, A&A, 544, A51 (Paper II). Koptelova E.A., Oknyanskij V.L., Shimanovskaya E.V.: 2006, A&A, 452, 37.

Koptelova E.A., Artamonov B.P., Shimanovskaya E.V. et al.: 2007, Astron. Rep., 51, 797.

Koptelova E., Artamonov B.P., Bruevich V.V., Burkhonov O.A., Sergeev A.V.: 2008, Astron. Rep., 52, 270.

Koptelova E., Oknyanskij V.L., Artamonov B.P., Burkhonov O.: 2010, MNRAS, 401, 2805 (Paper I).

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Опубліковано

2012-11-15

Як цитувати

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. V., Ehgamberdiev, S. A., & Ibragimov, M. A. (2012). TIME DELAY BETWEEN IMAGES OF THE LENSED QUASAR UM673. Одеські астрономічні публікації, 25(2), 169–171. https://doi.org/10.18524/1810-4215.2012.25.83310

Номер

Том 25 № 2 (2012)

Розділ

Статті

Ліцензія

Авторське право (c) 2012 Odessa Astronomical Publications

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