Using a sea interferometer, Bolton and Stanley isolated Cygnus A as a discrete source in 1948. It is a prime example� of a powerful radio galaxy and, in the last decade, has also been studied extensively in X-rays. In this paper I summarise the results from a ROSAT X-ray image.
NuSTAROBSERVATIONS OF THE POWERFUL RADIO-GALAXY CYGNUS A
