X-Nico

unusual facts about active galactic nucleus


NGC 6384

At one time NGC 6384 was considered a normal galaxy with no activity in the nucleus.


NGC 4698

NGC 4698 is classified as a Seyfert-2 galaxy with an active galactic nucleus, which displays a prominent emission of radio and X-ray energy from the core while showing narrow emission lines in the optical spectrum.


see also

Swift Gamma-Ray Burst Mission

March 28, 2011: Swift detected GRB 110328A, which subsequent analysis showed to possibly be the signature of a star being disrupted by a black hole or the ignition of an active galactic nucleus.