|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Steps toward determination of the size and structure of the broad-line region in active galactic nuclei. II - an intensive study of NGC 5548 at optical wavelengthsстатья
Информация о цитировании статьи получена из
Scopus,
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: Peterson B.M., Balonek T.J., Barker E.S., Bechtold J., Bertram R., Bochkarev N.G., Collaboration <AGN Watch>
- Журнал: Astrophysical Journal
- Том: 368
- Год издания: 1991
- Издательство: University of Chicago Press
- Местоположение издательства: United States
- Первая страница: 119
- Последняя страница: 137
- DOI: 10.1086/169675
- Аннотация: A large, international program of ground-based optical spectroscopy and photometry of the variable Seyfert 1 galaxy NGC 5548 undertaken in support of an IUE monitoring campaign is described. This contribution presents the data base and describes the methods used to correct for systematic differences between spectra from different sources. Optical continuum and H-beta emission-line light curves are derived from the spectra. The behavior of the optical continuum is qualitatively the same as the behavior of the ultraviolet continuum. Cross-correlation of the ultraviolet and optical continuum measurements does not reveal any significant lag between them. The h-beta emission-line variations show the same basic pattern as seen in the continuum and ultraviolet emission lines, with H-beta lagging behind the continuum by about 20 days. This is significantly larger than the about 10 day lag deduced for Ly-alpha.
- Добавил в систему: Бочкарев Николай Геннадиевич