Definitions for "Blazar"
A class of active galactic nuclei characterized by high variability in flux and polarization; a large fraction exhibits apparent superluminal motion, indicating relativistic flow.
An object which consists of a supermassive black hole that emits an intense beam of particles and light over a broad frequency range from radio waves to gamma-rays.
A type of AGN that often appears as a point-like source of bright, highly variable radiation.