Observations of active galaxies
DOI: 10.1038/325666a0
Bibcode: 1987Natur.325..666M
Mushotzky, Richard
United States
Abstract
New information obtained by the EXOSAT satellite on the nature of the X-ray variability in AGNs is discussed. From the EXOSAT data, it is seen that many more AGNs vary on short timescales; in some cases, the character of the time variability is quantitatively and qualitatively different than expected from the flare model of the variability. Data on the two active galaxies NGC5506 and NGC4051, which exemplify these findings, are discussed.
1987
•
Nature
Exosat
2