http://www.newsweek.com/mysterious-gamma-rays-traced-galaxies-powered-feeding-black-holes-blazars-1638395

A team of astronomers has traced hundreds of previously unidentified gamma-ray sources back to blazars, active galaxies with a feeding supermassive black hole at their center that fire jets of energy towards Earth.

The research, published in The Astronomical Journal, addresses one of the most significant challenges in high-energy gamma-ray astronomy; looking for the low-energy counterparts of unidentified gamma-ray sources.