The X-ray spectra and variability of active galaxies
Abstract
A total of approximately 20 Seyfert galaxies have been now identified as X-ray sources. Experiment C on Ariel V has observed a total of six of these (NGC 4151, 3C 390.3, NGC 5548, Mkn 279, Mkn 506, and Mkn 509). In the present paper, the spectral data obtained from Experiment C for these galaxies are discussed and summarized. The data are compared with observations of NGC 5128 (a radio galaxy), obtained during three periods, spanning four years.
- Publication:
-
COSPAR, 21st Plenary Meeting
- Pub Date:
- May 1978
- Bibcode:
- 1978cosp.meetT....S
- Keywords:
-
- Active Galaxies;
- Ariel 5 Satellite;
- Astronomical Spectroscopy;
- Seyfert Galaxies;
- Variability;
- X Ray Sources;
- X Ray Spectra;
- Extraterrestrial Radiation;
- Heavy Elements;
- Astrophysics