«We were looking for orbiting pairs of supermassive black holes, with one offset from the center of a galaxy, as telltale evidence of a previous galaxy merger,» said James Condon, of the National Radio Astronomy Observatory. (public.nrao.edu)
It will also pick up lower frequency waves, showing us a different set of objects, such as pairs of supermassive black holes. (newscientist.com)
Nanohertz gravitational waves are emitted from pairs of supermassive black holes orbiting each other, each of which contain millions or a billion times more mass than those detected by LIGO. (sciencedaily.com)