Einstein SSS+MPC observations of Seyfert type galaxies.
Abstract
The authors have re-investigated the X-ray spectra of 27 Seyfert galaxies measured with the Solid State Spectrometer onboard the Einstein Observatory. The new results are that the best-fit single power law indices generally agree with those previously reported, but that soft excesses are inferred for at least 20% of the measured spectra. In most cases, these soft excesses are consistent with either a ≡0.25 keV black body or Fe-L line emission that might arise in the intercloud medium of the BLR.
- Publication:
-
Two Topics in X-Ray Astronomy, Volume 1: X Ray Binaries. Volume 2: AGN and the X Ray Background
- Pub Date:
- November 1989
- Bibcode:
- 1989ESASP.296.1105H
- Keywords:
-
- Black Body Radiation;
- Data Processing;
- Heao 2;
- Proportional Counters;
- Seyfert Galaxies;
- Spectrometers;
- X Ray Spectra;
- Data Acquisition;
- Iron;
- Line Spectra;
- Spectral Line Width;
- X Ray Absorption;
- Astronomy;
- Seyfert Galaxies: X-Ray Spectra