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Goddard TV Video Tape: G2012-033 -- AGN Flare

Movie

Title
Astronomers using data from the European Space Agency's XMM-Newton satellite have found a long-sought X-ray signal from NGC 4151, a galaxy that contains a supermassive black hole. When the black hole's X-ray source flares, its accretion disk reflects the emission about half an hour later. The discovery promises a new way to unravel what's happening in the neighborhood of these powerful objects. For complete transcript, click here . X-ray 'Echoes' Probe Habitat
of Monster Black Hole