On gravitational lensing by deflectors in motion
  Gravitational lensing by a spinning deflector in translational motion relative to the observer is discussed in the weak field, slow motion approximation. The effect of rotation, which generates an intrinsic gravito-magnetic field, separates from that due to radial motion. Corrections to the lens equation, deflection angle and time delay are derived. 
M. Sereno (DSF, Unina; Inaf-Oac; INFN-Sec. Napoli)