Blazar

A blazar is a very compact quasar (quasi-stellar object) associated with a presumed supermassive black hole at the center of an active, giant elliptical galaxy. Blazars are among the most energetic phenomena in the universe and are an important topic in extragalactic astronomy.

Blazars are members of a larger group of active galaxies that host active galactic nuclei (AGN). A few rare objects may be "intermediate blazars" that appear to have a mixture of properties from both optically violent variable (OVV) quasars and BL Lac objects. The name "blazar" was originally coined in 1978 by astronomer Edward Spiegel to denote the combination of these two classes.

Blazars are AGN with a relativistic jet that is pointing in the general direction of the Earth. We observe "down" the jet, or nearly so, and this accounts for the rapid variability and compact features of both types of blazars. Many blazars have apparent superluminal features within the first few parsecs of their jets, probably due to relativistic shock fronts.

The generally accepted picture is that OVV quasars are intrinsically powerful radio galaxies while BL Lac objects are intrinsically weak radio galaxies. In both cases the host galaxies are giant ellipticals.

Alternative models, for example, gravitational lensing, may account for a few observations of some blazars which are not consistent with the general properties.

Read more about Blazar:  Structure, Relativistic Beaming, Discovery, Current Vision

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... In August 2007, Luxtera announced the availability of Blazar, a 40GB optical active cable for interconnect within high performance computer clusters using single-mode fiber ... Blazar is compliant with the SFP+ interface, allowing for the cable to be used in several different applications ...
Blazar - Current Vision
... Blazars are thought to be active galactic nuclei, with relativistic jets oriented close to the line of sight with the observer ... luminosity, very rapid variation, high polarization (when compared with non-blazar quasars), and the apparent superluminal motions detected along the first few parsecs of the jets in ... populations explains the difference in emission line properties in blazars ...
List Of Galaxies - Extremes - Distances
... Most distant Seyfert galaxy z= Closest blazar Markarian 421 (Mrk 421, Mkn 421, PKS 1101+384, LEDA 33452) z=0.030 This is a BL Lac object ... Most distant blazar Q0906+6930 z=5.47 This is a flat spectrum radio-loud quasar type blazar ...