activity
19972019
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 · 1.4k across the 26 of their papers we have counts for

collaborators
Showing 2019Show all

1 paper · 1 filter

astro-ph.GA2019★ 60 cited

Long-term optical spectral monitoring of a changing-look AGN NGC 3516 I: Continuum and broad-line flux variability

A. I. Shapovalova, L. C. Popovic, V. L. Afanasiev +11

Here we present the long-term optical spectral monitoring of a changing-look active galactic nuclei (AGN) NGC 3516 that covers 22 years (from 1996 to 2018). We explore a variabilit…