High energy continuum measurements of active galactic nuclei
Abstract
We review recent hard X-ray and gamma-ray observations of Cen A, NGC 4151, 3C273, and 3C279. The new data showed remarkable variability of these objects in the high-energy gamma-ray regime. Recent observations of GRANAT show an unexpected sharp break at ∼50 keV in the 1990 spectrum of NGC 4151. Recent observations by the Compton Observatory show intense GeV emission from 3C279 in June 1991. We present composite energy spectra of these objects from the radio to gamma-ray energies.
- Publication:
-
Testing the AGN paradigm
- Pub Date:
- May 1992
- DOI:
- Bibcode:
- 1992AIPC..254..348G
- Keywords:
-
- Active Galactic Nuclei;
- Continuous Radiation;
- Gamma Ray Spectra;
- High Energy Interactions;
- Radiation Measurement;
- X Ray Spectra;
- Cos-B Satellite;
- Energy Budgets;
- Gamma Ray Observatory;
- Astrophysics;
- 98.50.Vr;
- 95.85.Nv;
- 95.85.Qx;
- 98.50.Sp;
- X-ray;
- ACTIVE GALACTIC NUCLEI;
- CONTINUOUS RADIATION;
- GAMMA RAY SPECTRA;
- HIGH ENERGY INTERACTIONS;
- RADIATION MEASUREMENT;
- X RAY SPECTRA;
- COS-B SATELLITE;
- ENERGY BUDGETS;
- GAMMA RAY OBSERVATORY