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19982019
most citedSteps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei. XVI. A Thirteen-Year Study of Spectral Variability in NGC 5548

201 citations · 538 across the 9 of their papers we have counts for

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astro-ph2006★ 22 cited

Optical Photometrical Observations and Variability for Quasar 4C 29.45

J. H. Fan, J. Tao, B. C. Qian +6

We reported the result of long term optical variability of the blazar 4C 29.45 (QSO 1156+295, Ton 599), carried out optical photometric observations in Johnson V, Cousins RI passba…