Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. XIII. Ultraviolet Observations of the Broad‐Line Radio Galaxy 3C 390.3

O’Brien, P. T.; Dietrich, M.; Leighly, Karen M.; Alloin, D.; Clavel, J.; Crenshaw, D. Michael; Horne, K.; Kriss, G. A.; Krolik, Julian H.; Malkan, Matthew A.; Netzer, H.; Peterson, B. M.; Reichert, G. A.; Rodríguez-Pascual, P. M.; Wamsteker, W.; Anderson, K. S. J.; Бочкарев, Н. Г.; Cheng, F. Z.; Filippenko, A. V.; Gaskell, C. Martin; George, I. M.; Goad, M. R.; Ho, Luis C.; Kaspi, S.; Kollatschny, W.; Korista, K. T.; MacAlpine, G. M.; Marlow, D. R.; Martin, Pierrick; Morris, Simon L.; Pogge, Richard W.; Qian, Bochen; Recondo, Carmen; Espinosa, J. M. Rodríguez; Santos-Lleó, M.; Shapovalova, A. I.; Shull, J. M.; Stirpe, G. M.; Sun, Wei‐Hsin; Turner, T. J.; Vio, R.; Wagner, S. J.; Wanders, I.; Wills, K. A.; Wu, H. R.; Xue, Suijian; Zou, Zhimin

doi:10.1086/306464

Cited by 86 publications

(55 citation statements)

References 52 publications

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“…A radial flow would be reflected in a difference between the time lag measured for the blue and red wings of the line; such difference is generally not detected (e.g. Koratkar & Gaskell 1991;Wanders & Horne 1994;Wanders & Peterson 1996;O'Brien et al 1998;Sergeev et al 2002), although a mild radial flow has been claimed by Kollatschny (2003) in the Seyfert 1 Mrk 110.…”

Section: Results Of Agn Monitoring Programsmentioning

confidence: 99%

Supermassive Black Holes in Galactic Nuclei: Past, Present and Future Research

2005

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Section: Results Of Agn Monitoring Programsmentioning

confidence: 99%

Supermassive Black Holes in Galactic Nuclei: Past, Present and Future Research

2005

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“…The variability parameter F var gives the level of flux variability and is calculated using equation from O'Brien et al (1998). For the luminosity at 5100 Å we calculated the luminosity distances with the online calculator of Wright (2006), taking the same cosmological parameters as in Ilić et al (2015):…”

Section: Observations and Data Analysismentioning

confidence: 99%

Long-Term Monitoring of the Broad-Line Region Properties in a Selected Sample of AGN

Ilić

Shapovalova

Chavushyan

et al. 2017

Front. Astron. Space Sci.

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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 Science. This campaign has produced a remarkable set of optical spectra, since we have monitored for several decades different types of broad-line (type 1) AGN, from a Seyfert 1, double-peaked line, radio loud and radio quiet AGN, to a supermassive binary black hole candidate. Our analysis of the properties of the broad line region (BLR) of these objects is based on the variability of the broad emission lines. We hereby give a comparative review of the variability properties of the broad emission lines and the BLR of seven different type 1 AGNs, emphasizing some important results, such as the variability rate, the BLR geometry, and the presence of the intrinsic Baldwin effect. We are discussing the difference and similarity in the continuum and emission line variability, focusing on what is the impact of our results to the supermassive black hole mass determination from the BLR properties.

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“…To estimate the variability in different line segments, we used the method reported by O'Brien et al (1998) and defined several parameters that characterize the variability of the continuum, total line, and line-segments fluxes (Table 10). There, N is the number of spectra, F denotes the mean flux over the whole observing period, σ(F) is the standard deviation, and R(max/min) is the ratio of the highest to lowest flux in the monitored period.…”

Section: Variability Of the Emission Lines And Continuummentioning

confidence: 99%

Spectral optical monitoring of a double-peaked emission line AGN Arp 102B

Shapovalova

Popovic

Burenkov

et al. 2013

A&A

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Context. We present results of long-term (1987-2010) optical spectral monitoring of the broad-line radio galaxy Arp 102B, a prototype of an active galactic nucleus with double-peaked broad emission lines that are commonly assumed to be emitted from an accretion disk. Aims. To explore the structure of the broad-line region (BLR), we analyze the light-curves of the broad Hα and Hβ lines and the continuum flux. We aim to estimate the dimensions of the broad-line emitting regions and the mass of the central black hole. Methods. We used the cross correlation function to find lags between the lines and continuum variations. We investigated the correlation between line and continuum fluxes in more detail and explored periodical variations of the red-to-blue line flux ratio using Lomb-Scargle periodograms. Results. The line and continuum light-curves show several flare-like events. The fluxes in lines and in the continuum show no significant change (around 20%) during the monitored period. We found a weak correlation between the line and continuum flux variation that may indicate that the line variation is weakly connected with the variation of the central photoionization source. In spite of this weak line-continuum correlation, we estimated a time lag for Hβ of about 20 days using various methods. The correlation between the Hβ and Hα flux variation is significantly higher than that between the lines and continuum. During the monitored period, the Hβ and Hα lines show double-peaked profiles, and we found an indication for a periodical oscillation in the red-to-blue flux ratio of the Hα line. The estimated mass of the central black hole is ∼1.1 × 10 8 M , which agrees with the mass estimated from the M-σ * relation.

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Steps toward Determination of the Size and Structure of the Broad‐Line Region in Active Galactic Nuclei. XIII. Ultraviolet Observations of the Broad‐Line Radio Galaxy 3C 390.3

Cited by 86 publications

References 52 publications

Supermassive Black Holes in Galactic Nuclei: Past, Present and Future Research

Supermassive Black Holes in Galactic Nuclei: Past, Present and Future Research

Long-Term Monitoring of the Broad-Line Region Properties in a Selected Sample of AGN

Spectral optical monitoring of a double-peaked emission line AGN Arp 102B

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