The ultraviolet spectrum of NGC 4151 from 1978 to 1990 - General characteristics and evolution

Autor:	G. C. Perola, G. E. Bromage, M. A. J. Snijders, A. Elvius, M. H. Ulrich, J. Clavel, A. Boksenberg, M. V. Penston
Rok vydání:	1991
Předmět:	Physics Spectral index Satellite observation Active galactic nucleus Astronomy Astronomy and Astrophysics Astrophysics medicine.disease_cause Light curve Astronomical spectroscopy Spectral line Space and Planetary Science medicine Emission spectrum Ultraviolet
Zdroj:	The Astrophysical Journal. 382:483
ISSN:	1538-4357 0004-637X
Popis:	From the examination of all the low-dispersion IUE spectra of NGC 4151 taken since the launch of IUE in 1978, including the latest data taken in 1990, we follow the evolution of this active nucleus on time scales ranging from days to 10 years. We concentrate our analysis on the campaigns of observations during which the nucleus was not continuously in a minimum state.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::82d2e7587830a0faf79d3c90beee53e5 https://doi.org/10.1086/170735 Zobrazit plný text záznamu