The Open UniversitySkip to content
 

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 wavelengths

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. (1992). 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 wavelengths. Astrophysical Journal, 392(2) pp. 470–484.

Full text available as:
[img]
Preview
PDF (Not Set) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (2183Kb)
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1086/171447
Google Scholar: Look up in Google Scholar

Abstract

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
ISSN: 1538-4357
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)
Item ID: 11232
Depositing User: Astrid Peterkin
Date Deposited: 07 Aug 2008 16:31
Last Modified: 26 Feb 2014 16:51
URI: http://oro.open.ac.uk/id/eprint/11232
Share this page:

Altmetrics

Scopus Citations

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk