Studies of some superluminal blazars and strong flat-spectrum radio quasars, that are not seen in high energy gamma-rays by EGRET.
Abstract
Many of the active galactic nuclei (AGN) detected by EGRET above 100MeV are known or suspected to be superluminal sources. We report results of observations of 35 additional blazars which have been selected from the list of known and possibly superluminal sources. In addition we included six blazars which are prominent for other reasons. For three of these sources (3C 345, 3C 216 and 0735+178) we found a signal at the 3 to 4σ significance level in high energy gamma rays. For others, the 2σ upper limits (equivalent to 95% confidence) for the gamma-ray fluxes for energies greater than 100MeV are given here.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1995
- Bibcode:
- 1995A&A...299..680V
- Keywords:
-
- GAMMA RAYS: OBSERVATIONS;
- RADIO CONTINUUM: GALAXIES;
- GALAXIES: ACTIVE;
- GALAXIES: JETS;
- QUASARS: GENERAL