60 citations · 207 across the 8 of their papers we have counts for
8 papers
The extremes of AGN variability: outbursts, deep fades, changing looks, exceptional spectral states, and semi-periodicities
S. Komossa, D. Grupe, P. Marziani +16
The extremes of Active Galactic Nuclei (AGN) variability offer valuable new insights into the drivers and physics of AGN. We discuss some of the most extreme cases of AGN variabili…
The LSST era of supermassive black holes accretion-disk reverberation mapping
Andjelka B. Kovacevic, Viktor Radovic, Dragana Ilic +22
The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will detect an unprecedentedly large sample of actively accreting supermassive black holes with typical accreti…
A flare in the optical spotted in the changing-look Seyfert NGC 3516
D. Ilic, V. Oknyansky, L. C. Popovic +14
We present observations from the short-term intensive optical campaign (from Sep2019 to Jan2020) of the changing-look Seyfert NGC 3516. This active galactic nucleus is known to hav…
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…
The structure of the Mg II broad line emitting region in Type 1 AGNs
Luka C. Popović, Jelena Kovacević-Dojcinović, Sladjana Marceta-Mandić
We investigate the structure of the Mg II broad line emission region in a sample of 284 Type 1 active galactic nuclei (AGNs), through comparing the kinematical parameters of the br…
Long-term monitoring of the broad-line region properties in a selected sample of AGN
Dragana Ilic, Alla I. Shapovalova, Luka C. Popovic +8
We present the results of the long-term optical monitoring campaign of active galactic nuclei (AGN) coordinated by the Special Astrophysical Observatory of the Russian Academy of S…
Spectroscopy and spectropolarimetry of AGN: from observations to modelling
L. C. Popovic, D. Ilic, E. Bon +10
Active galactic nuclei (AGN) are one of the most luminous objects in the Universe, emitting powerful continuum and line emission across all wavelength bands. They represent an impo…
Black Hole Mass Estimation in Type 1 AGN: H vs. Mg II lines and the role of Balmer continuum
Jelena Kovačević-Dojčinović, Sladjana Marčeta-Mandić, Luka Č. Popović
Here we investigate the H and Mg II spectral line parameters used for the black hole mass (M) estimation for a sample of Type 1 Active Galactic Nuclei (AGN) spectra s…