Abstract
Astrophysical sources, both galactic and extragalactic that are believed to be powered by black holes are often found to have relativistic jets (e.g., GRS 1915+105, M87,Cen A). These relativistic jets are found to exhibit extreme behavior with a wide rangeof phenomena in energy (e.g. radio to TeV ³-ray emission, M87), time (e.g. variability from minutes to decades, OJ 287) and spatial dom…