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Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. III - Further observations of NGC 5548 at optical wavelengthsThe results of the second year of an intensive ground-based spectroscopic and photometric study of variability in the bright Seyfert 1 galaxy NGC 5548 are reported in order to study the relationship between continuum and emission-line variability. Relative to the first year of the monitoring program, the nucleus of NGC 5548 was considerably fainter and the continuum variations slower during the second year, but the continuum H-beta cross-correlation results for the two years are nearly identical. The variations in the broad H-beta emission-line lag behind those in the continuum by somewhat less than 20 days, as concluded from the first year's data.
Document ID
19920061087
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Peterson, B. M.
(Ohio State University Columbus, United States)
Alloin, D.
(Paris Observatoire, Meudon, France)
Axon, D.
(Nuffield Radio Astronomy Laboratories Macclesfield, United Kingdom)
Balonek, T. J.
(Colgate University Hamilton, NY, United States)
Bertram, R.
(Ohio State University Columbus, United States)
Boroson, T. A.
(Kitt Peak National Observatory Tucson, AZ, United States)
Christensen, J. A.
(Colgate University Hamilton, NY, United States)
Clements, S. D.
(Florida, University Gainesville, United States)
Dietrich, M.
(Universitaets-Sternwarte Goettingen, Federal Republic of Germany, United States)
Elvis, M.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 15, 2013
Publication Date
June 20, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 392
Issue: 2 Ju
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
92A43711
Funding Number(s)
CONTRACT_GRANT: NAG5-1366
CONTRACT_GRANT: NSF AST-90-03829
CONTRACT_GRANT: NSF AST-88-21839
CONTRACT_GRANT: NSF AST-87-14937
CONTRACT_GRANT: NSF AST-89-15258
CONTRACT_GRANT: NSF AST-86-14510
CONTRACT_GRANT: NSF USE-87-50955
CONTRACT_GRANT: NAS8-30751
CONTRACT_GRANT: NSF AST-89-57063
Distribution Limits
Public
Copyright
Other

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