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A fast and long-lived outflow from the supermassive black hole in NGC 5548

Kaastra, J. S.; Harrison, F. A.; Nandra, K. +31 more

Supermassive black holes in the nuclei of active galaxies expel large amounts of matter through powerful winds of ionized gas. The archetypal active galaxy NGC 5548 has been studied for decades, and high-resolution x-ray and ultraviolet (UV) observations have previously shown a persistent ionized outflow. An observing campaign in 2013 with six spa…