Muitiwavelengths observations of lensed quasars: Interband time delays

E. Koptelova, V. Oknyanskij, B. Artamonov, W. P. Chen

研究成果: 雜誌貢獻會議論文同行評審

3 引文 斯高帕斯(Scopus)


The time delays between brightness variations in two different optical bands have been measured for a large number of low-redshift AGN and nonlensed quasars. These time delays represent a light travel time between two different emission regions and can be used to test variability mechanisms in the source. We search for the interband delays in a sample of lensed quasars: Q2237+0305, SBS1520+530, HE2149-2745, HE1104-1805, UM673 in the redshift range 1.7 ≲ z ≲ 2.7. From cross-correlation analysis of light curves of the quasars we find that the brightness variations at longer wavelengths may follow the brightness variations at shorter wavelengths. The observed delays are consistent with the delays expected from reprocessing in accretion disc irradiated by the central variable source.

頁(從 - 到)138-143
期刊Memorie della Societa Astronomica Italiana, Supplementi - Journal of the Italian Astronomical Society, Supplement
出版狀態已出版 - 2010
事件8th International Workshop on Multifrequency Behaviour of High Energy Cosmic Sources - Vulcano, Sicily, Italy
持續時間: 25 5月 200930 5月 2009


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