X-Ray Emission from a Radio Hotspot in 3C 390.3: Evidence for the   Deflection of a Radio Jet by a Neighboring Galaxy
  By summing a large number of ROSAT High Resolution Imager (HRI) observations of the variable radio galaxy 3C 390.3, we demonstrate that the X-ray emission associated with the northern radio lobe (reported by Prieto 1997) can be identified with hotspot B. None of the other hotspots have been detected. We present evidence that the anomalous X-ray emission is the consequence of a strong shock produced where the northern radio jet impinges onto an external galaxy. 
D. E. Harris (Center for Astrophysics) K.M. Leighly (Columbia   Astrophysics Laboratory) J.P. Leahy (University of Mancheste...