activity
20022026
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 · 488 across the 26 of their papers we have counts for

collaborators
Showing astro-ph.GAShow all

5 papers · 1 filter

astro-ph.GA2025★ 2 cited

Radio and Optical Properties of the blazar PKS 1614+051 at z=3.21

Yu. V. Sotnikova, A. G. Mikhailov, A. E. Volvach +21

We present a study of the radio and optical properties of the high-frequency peaker (HFP) blazar PKS 1614+051 at based on the data covering the time period of 1997-2024. T…

astro-ph.GA2024★ 3 cited

Monitoring of DDO68 'Northern Ring' SF regions during years 2016-2023

S. A. Pustilnik, Y. A. Perepelitsyna, A. S. Vinokurov +6

DDO68 is a star-forming (SF) dwarf galaxy residing in a nearby void. Its gas metallicity is among the lowest known in the local Universe, with parameter 12+log(O/H) in the range of…

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…

astro-ph.GA2017★ 18 cited

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…

astro-ph.GA2012★ 7 cited

Photometric study of open clusters Berkeley 96, Berkeley 97, King 12, NGC 7261, NGC 7296, and NGC 7788

Elena V. Glushkova, Marina V. Zabolotskikh, Sergey E. Koposov +4

The BVRcIc CCD photometry in the fields of six open clusters toward the Perseus spiral arm is presented. These data along with JHKs magnitudes taken from 2MASS catalog, have been u…