most citedSpectral optical monitoring of 3C390.3 in 1995-2007: I. Light curves and flux variation of the continuum and broad lines

55 citations · 55 across the 1 of their papers we have counts for

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astro-ph2008★ 75 cited

Long-term variability of the optical spectra of NGC 4151: I. Light curves and flux correlations

A. I. Shapovalova, L. C. Popovic, S. Collin +13

Results of a long-term spectral monitoring of the active galactic nucleus of NGC 4151 are presented (11 years, from 1996 to 2006). High quality spectra (S/N>50 in the continuum nea…