activity
19982004
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 · 249 across the 5 of their papers we have counts for

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astro-ph2003★ 13 cited

Variability of the Halpha emission of Cygnus X-1 and its connection with the soft X-ray radiation

A. E. Tarasov, C. Brocksopp, V. M. Lyuty

High-resolution Halpha monitoring of Cyg X-1, HD226868 was carried out during 1996-2002 and the resultant spectra analysed in conjunction with 1.5-12 keV X-ray monitoring. We demon…