X-ray observations of the Seyfert 1 galaxies AKN 120 and MCG 8-11-11.
Abstract
A new X-ray source, H0523-00, with the optically variable Seyfert 1 galaxy AKN 120 is identified. The source has a 2-10 keV X-ray flux of 2 x 10 to the -11th ergs/sq cm s which corresponds to a 2-10 keV X-ray luminosity of 10 to the 44th ergs/s. X-ray observations over a 1.5 year time span combined with contemporaneous optical photometry show a decrease in the optical with no corresponding decrease in the X-ray. In contrast, similar observations of MCG 8-11-11 show a contemporaneous decrease in optical and X-ray fluxes. It is noted that the infrared and X-ray spectral slopes for these two objects are similar, with the optical being steeper by roughly one unit.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1980
- DOI:
- 10.1086/183281
- Bibcode:
- 1980ApJ...239L...5M
- Keywords:
-
- Flux Density;
- Seyfert Galaxies;
- X Ray Astronomy;
- X Ray Sources;
- X Ray Spectra;
- Emission Spectra;
- Infrared Spectra;
- Luminous Intensity;
- Periodic Variations;
- Spectrophotometry;
- X Ray Density Measurement;
- Astrophysics