The International AGN Watch

Papers Published

Below we provide a complete listing of all International AGN Watch papers. The basic data papers are those in the ``Steps Toward Determination...'' series, which describe the principal results of spectroscopic monitoring projects. Four papers on NGC 4151 describe an intensive multiwavelength monitoring campaign to study continuum variability in that source. The category ``other AGN Watch papers'' describe observational programs that were built around the primary UV/optical monitoring programs and carried out by smaller groups of AGN Watch members.

AGN Watch papers that have been accepted for publication but not yet published are either available in preprint form as tarred, gzipped PostScript files [instructions] or as links to astro-ph.

Papers subdirectory: Jump to:

["Steps Toward..." series]

[NGC 4151 papers]

[Akn 564 papers]

[Other AGN Watch papers]

[Papers based on AGN Watch data]

The main data papers, the ``Steps Toward Determination...'' series

"Steps Toward Determination of the Size and Structure of the Broad-Line Region in Active Galactic Nuclei."
This is the title of the principal AGN Watch data papers. They are numbered by order of submission to journals, and have a descriptive subtitle.

I. An 8 Month Campaign of Monitoring NGC 5548 with IUE
Clavel, J., et al., 1991, ApJ, 366, 64 [Abstract]
II. An Intensive Study of NGC 5548 at Optical Wavelengths
Peterson, B.M., et al., 1991, ApJ, 368, 119 [Abstract]
III. Further Observations of NGC 5548 at Optical Wavelengths
Peterson, B.M., et al., 1992, ApJ, 392, 470 [Abstract]
IV. Intensity Variations of the Optical Emission Lines of NGC 5548
Dietrich, M., et al., 1993, ApJ, 408, 416 [Abstract]
V. Variability of the Ultraviolet Continuum and Emission Lines of NGC 3783
Reichert, G.A., et al., 1994, ApJ, 425, 582 [Abstract]
VI. Variability of NGC 3783 from Ground-Based Data
Stirpe G.M., et al., 1994, ApJ, 425, 609 [Abstract]
VII. Variability of the Optical Spectrum of NGC 5548 Over 4 Years
Peterson, B.M.., et al., 1994, ApJ, 425, 622 [Abstract]
VIII. An Intensive HST, IUE, and Ground-based Study of NGC 5548
Korista, K.T., et al., 1995, ApJS, 97, 285 [Abstract]
IX. Ultraviolet Observations of Fairall 9
Rodríguez-Pascual, P.M., et al., 1997, ApJS, 110, 9 [Abstract]
X. Variability of Fairall 9 from Optical Data
Santos-Lleó, M., et al., 1997, ApJS, 112, 271 [Abstract]
XI. Intensive Monitoring of the Ultraviolet Spectrum of NGC 7469
Wanders, I., et al., 1997, ApJS, 113, 69 [Abstract]
XII. Ground-Based Monitoring of 3C 390.3
Dietrich, M., et al. 1998, ApJS, 115, 185. [astro-ph/9801303]
XIII. Ultraviolet Observations of the Broad-Line Radio Galaxy 3C 390.3
O'Brien, P.T., et al. 1998, ApJ, 509, 163 [Abstract] [astro-ph/9806216]
XIV. Intensive Optical Spectrophotometric Observations of NGC 7469
Collier, S., et al. 1998, ApJ, 500, 162 [Abstract]
XV. Long-Term Optical Monitoring of NGC 5548
Peterson, B.M., et al. 1999, ApJ, 510, 659 [Abstract] [astro-ph/9808236]
XVI. A Thirteen-Year Study of Spectral Variability in NGC 5548
Peterson, B.M., et al. 2002, ApJ, in press [Abstract] [astro-ph/0208064] [Table 5 (PS format)]

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NGC 4151 papers

Multiwavelength Observations of Short Time-Scale Variability in NGC 4151. I. Ultraviolet Observations
Crenshaw D.M., et al., 1996, ApJ, 470, 322 [astro-ph/9605079]
Multiwavelength Observations of Short Time-Scale Variability in NGC 4151. II. Optical Observations
Kaspi S., et al., 1996, ApJ, 470, 336 [astro-ph/9605080]
Multiwavelength Observations of Short Time-Scale Variability in NGC 4151. III. X-ray and Gamma-ray Observations
Warwick R.S., et al., 1996, ApJ, 470, 349 [astro-ph/9605081]
Multiwavelength Observations of Short Time-Scale Variability in NGC 4151. IV. Analysis of Multiwavelength Continuum Variability
Edelson R.A., et al., 1996, ApJ, 470, 364 [astro-ph/9605082]

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Akn 564 papers

Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. I. ASCA Observations and the Variability of the X-ray Spectral Components
Turner, T.J., et al. 2001, ApJ, 561, 131 [astro-ph/0105283]
Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. II. Ultraviolet Continuum and Emission-line Variability
Collier, S., et al. 2001, ApJ, 561, 146 [astro-ph/0107059]
Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Akn 564. III. Optical Observations and the Optical-UV-X-ray Connection
Shemmer, O., et al. 2001, ApJ, 561, 162 [astro-ph/0107075]

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Other AGN Watch papers

Variations of the Ultraviolet Fe II and Balmer Continuum Emission in the Seyfert Galaxy NGC 5548
Maoz, D., et al., 1993, ApJ, 404, 576 [Abstract]
The International AGN Watch: A Multiwavelength Monitoring Consortium
Alloin D., Clavel J., Peterson B.M., Reichert G.A., and Stirpe G.M., 1994, in Frontiers of Space and Ground-Based Astronomy, Kluwer Acad. Press, ed. W. Wamsteker, M.S. Longair, and Y. Kondo, p. 325 [Abstract]
A Snapshot of the Continuous Emission of the Active Nucleus in NGC 3783 from Gamma-Ray to Radio Wavelengths
Alloin, D., et al. 1995, A&A, 293, 293 [Abstract]
The Galaxy Component and Nuclear Flux Measurements of NGC 5548 from Direct Imaging
Romanishin, W., et al., 1995, ApJ, 455, 516 [Abstract]
Monitoring of Active Galactic Nuclei: The Why and the How
Alloin, D., Santos-Lleó, M., Stirpe, G., and Peterson, B.M. 1995, The ESO Messenger, No. 80, 25 [Preprint (PostScript, gzipped, 43kB)]
Optical Continuum and Emission-Line Variability of the Seyfert 1 Galaxy Markarian 509
Carone, T.E., et al., 1996, ApJ, 471, 737 [Abstract]
The Variability and Spectrum of NGC 5548 in the Extreme Ultraviolet
Marshall, H.L., et al., 1997, ApJ, 479, 222 [Abstract]
X-Ray Observations of the Broad-Line Radio Galaxy 3C 390.3
Leighly, K.M., et al., 1997, ApJ, 483, 767 [astro-ph/9703013]
New Constraints on the Continuum Emission Mechanism of AGN: Intensive Monitoring of NGC 7469 in the X-Ray and Ultraviolet
Nandra, K., et al., 1998, ApJ, 505, 594 [astro-ph/9804135]
A Search for Ultra-Rapid Microvariability in the Seyfert Galaxy NGC 7469 with HST
Welsh, W.F., Peterson, B.M., Koratkar, A.P., and Korista, K.T. 1998, ApJ, 509, 118 [Abstract]
The International AGN Watch: Past, Present, and Future
Peterson, B.M. 1999, in Structure and Kinematics of Quasar Broad Line Regions, ed. C.M. Gaskell, W.N. Brandt, D. Dultzin-Hacyan, M. Dietrich, and M. Eracleous (San Francisco: ASP), p. 49 [Preprint (PostScript, gzipped, 45kB)]
A High Signal-to-Noise UV Spectrum of NGC 7469: New Support for Reprocessing of Continuum Radiation,
G.A. Kriss, B.M. Peterson, D.M. Crenshaw, and W. Zheng, 2000 ApJ, 535, 38 [astro-ph/9912204]
X-Ray and Optical Variability in NGC 4051 and the Nature of Narrow-Line Seyfert 1 Galaxies
B.M. Peterson, I.M. McHardy, B.J. Wilkes, P. Berlind, R. Bertram, M. Calkins, S.J. Collier, J.P. Huchra, S. Mathur, I. Papadakis, J. Peters, R.W. Pogge, P. Romano, S. Tokarz, P. Uttley, M. Vestergaard, and R.M. Wagner 2000, ApJ, 542, 161 [astro-ph/0005433]
Monitoring of the Optical and 2.5-11.7 micron Spectrum and mid-IR imaging of the Seyfert 1 Galaxy Mrk 279 with ISO,
M. Santos-Lleó et al., 2001, A&A, 369, 57 [astro-ph/0102356]

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Papers based on AGN Watch data
(This list is very incomplete. Please feel free to call additional papers to our attention: just send us an e-mail

Evidence for a Supermassive Black Hole in the Nucleus of the Seyfert Galaxy NGC 5548
Crenshaw, D.M., & Blackwell Jr., J.H. 1990, ApJ, 358, L37 [Abstract]
Echo Mapping of Broad Hbeta Emission in NGC 5548
Horne, K., Welsh, W.F., & Peterson, B.M. 1991, ApJ, 367, L5 [Abstract]
UV Variability of NGC 5548: Dynamics of the Continuum Production Region and Geometry of the Broad Line Region
Krolik, J.H., Horne, K., Kallman, T.R., Malkan, M.A., Edelson, R.A., and Kriss, G.A. 1991, ApJ, 371, 541 [Abstract]
Anisotropic Line Emission and the Geometry of the Broad-Line Region in Active Galactic Nuclei
Ferland, G.J., Peterson, B.M., Horne, K., Welsh, W.F., and Nahar, S.N. 1992, ApJ, 387, 95 [Abstract]
The Intrinsic Nature of the Baldwin Effect
Pogge, R.W., & Peterson, B.M. 1992, AJ. 103, 1084 [Abstract]
Variability of the Optical-UV Continuum in NGC 5548 - Implications for Accretion-Disc Models
Molendi, S., Maraschi, L., & Stella, L. 1992, MNRAS, 255, 27
NGC 5548: The Perfect Laboratory for Testing AGN Models?
Evlabia Rokaki, Suzy Collin-Souffrin, and Christian Magnan, 1993, A&A, 272, 8 [Abstract]
The Geometry and Kinematics of the Broad-Line Region in NGC 5548 from HST and IUE Observations
Wanders, I., Goad, M.R., Korista, K.T., Peterson, B.M., Horne, K., Ferland, G.J., Koratkar, A.P., Pogge, R.W., and Shields, J.C. 1995, ApJ 453, L87 [Abstract]
Kinematics of the Broad Emission Line Region in NGC 5548
Done, C. and Krolik, J. 1995, ApJ, 463, 144 [Abstract]
Evolution of the Broad-Line Region in NGC 5548
Wanders, I. 1995, A&A, 296, 332
Optical and ultraviolet emission-line variability of NGC 5548. The coordinated UV and optical monitoring campaign of 1989
Dietrich, M. and Kollatschny, W. 1995, A&A, 303, 405
Broad Emission-Line Profile Variability in NGC 5548. The Optical Emission Lines in 1989
Kollatschny, W. and Dietrich, M. 1996, A&A, 314, 43
A Long-Term Study of Broad Emission-Line Profile Variability in NGC 5548
Wanders I., Peterson B.M., 1996, ApJ, 466, 174 [Abstract] [Erratum] [Corrected Tables (Compressed PostScript [.ps.gz], 21kB)]
Dynamics of Broad Emission-Line Region in NGC 5548: Hydromagnetic Wind Model Versus Observations
Mark Bottorff, Kirk T. Korista, Isaac Shlosman, and Roger D. Blandford 1997, ApJ, 479, 200 [astro-ph/9610026]
Reverberation Mapping and the Physics of Active Galactic Nuclei
Netzer, H., & Peterson, B.M. 1997, in Astronomical Time Series, ed. D. Maoz, A. Sternberg, & E.M. Leibowitz (Dordrecht: Kluwer), pp. 85 - 108. [astro-ph/9706039]
Reverberation Mapping of Active Nuclei
B.M. Peterson 1998, Advances in Space Research, 21, 57 - 66 [Abstract]
AGN Watch Continuum Monitoring of Radio-Quiet and Radio-Loud AGN
O'Brien, P.T. & Leighly, K.M. 1998, Advances in Space Research, 21, 67 - 76 [Abstract] [Paper (Compressed PostScript [.ps.gz], 74kB)]
NGC 5548, A Case Study for Active Galactic Nuclei: Inconsistencies of Photoionized Models for the BLR
Anne-Marie Dumont, Suzy Collin-Souffrin, Ludmilla Nazarova, 1998, A&A, 331, 11 - 33 [Abstract]
The Quest for the Driving Force in Active Galactic Nuclei
Peterson, B.M., Collier, S., Horne, K., and Wanders, I. 1998, Ultraviolet Astrophysics Beyond the IUE Final Archive, ed. W. Wamsteker and R. Gonzálaz Riestra, ESA Conference Proceedings SP-413, 647 - 652 [Abstract] [Paper (Compressed PostScript [.ps.gz], 94kB)]
On Uncertainties in Cross-Correlation Lags and the Reality of Wavelength-Dependent Continuum Lags in Active Galactic Nuclei
Bradley M. Peterson, Ignaz Wanders, Keith Horne, Stefan Collier, Tal Alexander, Shai Kaspi, and Dan Maoz 1998, PASP, 110, 660 - 670 [astro-ph/9802103]
A New Direct Method for Measuring the Hubble Constant from Reverberating Accretion Discs in Active Galaxies
Stefan Collier, Keith Horne, Ignaz Wanders, and Bradley M. Peterson, 1999, MNRAS, 302, L24 [astro-ph/9811278]
Keplerian Motion of the Broad-Line Region Gas as Evidence for Supermassive Black Holes in Active Galactic Nuclei
Bradley M. Peterson and Amri Wandel 1999, ApJ, 521, L95 [astro-ph/9905382]
Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. I. Comparison of the Photoionization and Reverberation Techniques,
Amri Wandel, Bradley M. Peterson, and Matthew A. Malkan 1999, ApJ, 526, 579 [astro-ph/9905224]

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Updated 5 August 2002
peterson@astronomy.ohio-state.edu