Peterson, B.M.; Alloin, D.; Axon, D.; Balonek, T.J.; Bertram, R.; Boroson, T.A.; Christensen, J.A.; Clements, S.D.; Dietrich, M.; Elvis, M.; Filippenko, A.V.; Gaskell, C.M.; Haswell, C.A.; Huchra, J.P.; Jackson, N.; Kollatschny, W.; Korista, K.T. and Lame, N.J.
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|DOI (Digital Object Identifier) Link:||http://doi.org/10.1086/171447|
|Google Scholar:||Look up in Google Scholar|
The 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
|Item Type:||Journal Article|
|Keywords:||ACTIVE GALACTIC NUCLEI; ASTRONOMICAL SPECTROSCOPY; H BETA LINE; QUASARS; SEYFERT GALAXIES; BRIGHTNESS DISTRIBUTION; CALIBRATING; CHARGE COUPLED DEVICES|
|Academic Unit/Department:||Science > Physical Sciences
|Interdisciplinary Research Centre:||Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)|
|Depositing User:||Astrid Peterkin|
|Date Deposited:||07 Aug 2008 16:31|
|Last Modified:||25 Feb 2016 13:34|
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