Statistical analysis of the optical variability of QSO's |
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| Authors: | Xiao Xing-hua Tang Xiao-ying Cheng Fu-zhen |
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| Institution: | Beijing Normal University, China;Beijing Observatory, Academia Sinica, China;University of Science and Technology of China, China |
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| Abstract: | For 34 QSOs and 9 active galaxies with known optical variation and measured redshifts, the rate of optical variation appears to be positively correlated with the age: older quasars vary more violently than younger ones and active galaxies are the most violent of all. |
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