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Optical Continuum and Emission‐Line Variability of Seyfert 1 Galaxies
Open accessAbstract
We present the light curves obtained during an 8 yr program of optical spectroscopic monitoring of nine Seyfert 1 galaxies: 3C 120, Akn 120, Mrk 79, Mrk 110, Mrk 335, Mrk 509, Mrk 590, Mrk 704, and Mrk 817. All objects show significant variability in both the continuum and emission-line fluxes. We use cross-correlation analysis to derive the sizes of the broad Hβ-emitting regions based on emission-line time delays, or lags. We successfully measure time delays for eight of the nine sources and find values ranging from about 2 weeks to a little over 2 months. Combining the measured lags and widths of the variable parts of the emission lines allows us to make virial mass estimates for the active nucleus in each galaxy. The virial masses are in the range 10 7 -10 8 M ☉ .
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Cited by
Bentz, M. C., Peterson, B. M., Netzer, H., Pogge, R. W., & Vestergaard, M. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/697/1/160 · Cited by 608
Self-citationBentz, M. C., Walsh, J. L., Barth, A. J., Baliber, N., Bennert, V. N., Canalizo, G., Filippenko, A. V., Ganeshalingam, M., Gates, E. L., Greene, J. E., et al. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/705/1/199 · Cited by 444
Bentz, M. C., Peterson, B. M., Pogge, R. W., Vestergaard, M., & Onken, C. A. (2006) · The Astrophysical Journal · doi:10.1086/503537 · Cited by 403
Self-citationEvidence for Supermassive Black Holes in Active Galactic Nuclei from Emission-Line Reverberation
Peterson, B. M., & Wandel, A. (2000) · The Astrophysical Journal · doi:10.1086/312862 · Cited by 296
Self-citationTHE SLOAN DIGITAL SKY SURVEY REVERBERATION MAPPING PROJECT: TECHNICAL OVERVIEW
Shen, Y., Brandt, W. N., Dawson, K. S., Hall, P. B., McGreer, I. D., Anderson, S. F., Chen, Y., Denney, K. D., Eftekharzadeh, S., Fan, X., et al. (2014) · The Astrophysical Journal Supplement Series · doi:10.1088/0067-0049/216/1/4 · Cited by 210
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Metadata
- Authors
- Peterson, B. M., Wanders, I., Bertram, R., Hunley, J. F., Pogge, R. W., & Wagner, R. M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1998-07
- Volume
- 501
- Issue
- 1
- Pages
- 82-93
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2051496938
- Cited by
- 282
- References
- 0
- FWCI
- 8.79
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CoChat. (2026). Citation check: Optical Continuum and Emission‐Line Variability of Seyfert 1 Galaxies. https://app.cochat.ai/papers/10.1086/305813
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- Peterson, B. M., Wanders, I., Bertram, R., Hunley, J. F., Pogge, R. W., & Wagner, R. M. (1998). Optical Continuum and Emission‐Line Variability of Seyfert 1 Galaxies. The Astrophysical Journal. https://doi.org/10.1086/305813
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