201 citations · 2k across the 75 of their papers we have counts for
19 papers · 1 filter
Long-term optical spectral monitoring of a changing-look active galactic nucleus NGC 3516 -- II. Broad-line profile variability
Luka C. Popović, Dragana Ilić, Alexander Burenkov +10
We analyze the broad H line profile variability of the "changing look" active galactic nucleus (CL-AGN) NGC 3516 over a long period of 25 years. The observed change in the broad…
Unravelling the nature of the dual AGN in the galaxy pair system IRAS 05589+2828 and 2MASX J06021107+2828382
E. Benítez, E. Jiménez-Bailón, C. A. Negrete +10
We have studied the nuclear region of the previously detected dual AGN system in the galaxy pair IRAS 05589+2828 and 2MASX J06021107+2828382 through new optical spectroscopy observ…
Evidence of galaxy interaction in the Narrow-line Seyfert 1 galaxy IRAS17020+4544 seen by NOEMA
Q. Salomé, A. L. Longinotti, Y. Krongold +9
The narrow-line Seyfert 1 galaxy IRAS17020+4544 is one of the few sources where both an X-ray ultra-fast outflow and a molecular outflow were observed to be consistent with energy…
Baldwin Effect and Additional BLR Component in AGN with Superluminal Jets
V. M. Patiño-Ávarez, J. Torrealba, V. Chavushyan +4
We study the Baldwin Effect (BE) in 96 core-jet blazars with optical and ultraviolet spectroscopic data from a radio-loud AGN sample obtained from the MOJAVE 2 cm survey. A statist…
The disc-like host galaxies of radio-loud Narrow-Line Seyfert 1s
Alejandro Olguín-Iglesias, Jari Kotilainen, Vahram Chavushyan
Until recently, relativistic jets were ubiquitously found to be launched from giant elliptical galaxies. However, the detection by the Fermi-LAT of gamma-ray emission from radio-lo…
A young and obscured AGN embedded in the giant radio galaxy Mrk 1498
L. Hernández-García, F. Panessa, L. Bassani +10
Mrk 1498 is part of a sample of galaxies with extended emission line regions (extended outwards up to a distance of 7 kpc) suggested to be photo-ionized by an AGN that has fa…
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…
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…
FERMI transient J1544-0649: a flaring radio-weak BL Lac
G. Bruni, F. Panessa, G. Ghisellini +6
On May 15th, 2017, the \emph{FERMI}/LAT gamma-ray telescope observed a transient source not present in any previous high-energy catalogue: J1544-0649. It was visible for two consec…
Restarting activity in the nucleus of PBC J2333.9-2343: an extreme case of jet realignment
L. Hernández-García, F. Panessa, M. Giroletti +8
PBC J2333.9-2343 is a giant radio galaxy which shows different characteristics at different wavebands that are difficult to explain within the actual generic schemes of unification…
Long-term optical spectral monitoring of NGC 7469
Alla I. Shapovalova, L. C. Popović, V. H. Chavushyan +11
We present the results of the long-term (20-year period, from 1996 to 2015) optical spectral monitoring of the Seyfert 1 galaxy NGC 7469. The variation in the light-curves of the b…
Discovery of a pseudobulge galaxy launching powerful relativistic jets
J. K. Kotilainen, J. Leon Tavares, A. Olguin-Iglesias +4
Supermassive black holes launching plasma jets at close to speed of light, producing gamma-rays, have ubiquitously been found to be hosted by massive elliptical galaxies. Since ell…
The host galaxies of active galactic nuclei with powerful relativistic jets
A. Olguín-Iglesias, J. León-Tavares, J. K. Kotilainen +6
We present deep Near-infrared (NIR) images of a sample of 19 intermediate-redshift () radio-loud active galactic nuclei (AGN) with powerful relativistic jets ($L_{1.4GHz…
Very-high-energy gamma-rays from the Universe's middle age: detection of the z=0.940 blazar PKS 1441+25 with MAGIC
MAGIC Collaboration, M. L. Ahnen, S. Ansoldi +246
The flat-spectrum radio quasar PKS 1441+25 at a redshift of z = 0.940 is detected between 40 and 250 GeV with a significance of 25.5 σ using the MAGIC telescopes. Together with the…
Line shape variability in a sample of AGN with broad lines
D. Ilic, L. C. Popovic, A. I. Shapovalova +3
The spectral variability of active galactic nuclei (AGN) is one of their key features that enables us to study in more details the structure of AGN emitting regions. Especially, th…
Spectral optical monitoring of the double peaked emission line AGN Arp 102B: II. Variability of the broad line properties
L. C. Popovic, A. I. Shapovalova, D. Ilic +9
We investigate a long-term (26 years, from 1987 to 2013) variability in the broad spectral line properties of the radio galaxy Arp 102B, an active galaxy with broad double-peaked e…
Time Series Analysis of Active Galactic Nuclei: The case of Arp 102B, 3C 390.3, NGC 5548 and NGC 4051
A. Kovacevic, L. C. Popovic, A. I. Shapovalova +3
We used the Z-transformed Discrete Correlation Function (ZDCF) and the Stochastic Process Estimation for AGN Reverberation (SPEAR) methods for the time series analysis of the conti…
Radio-optical scrutiny of compact AGN: Correlations between properties of pc-scale jets and optical nuclear emission
T. G. Arshakian, J. Torrealba, V. H. Chavushyan +4
We study the correlations between the Very Long Baseline Array radio emission at 15 GHz, extended emission at 151 MHz, and optical nuclear emission at 5100 AA for a complete sample…
Long term variability of the Broad Emission Line profiles in AGN
A. I. Shapovalova, L. C. Popovic, N. G. Bochkarev +6
Results of a long-term monitoring ( years) of the broad line and continuum fluxes of three Active Galactic Nuclei (AGN), 3C 390.3, NGC 4151, and NGC 5548, are presented…