Light bending by a Coulomb field and the Aichelburg-Sexl ultraboost
  We use light deflection by a Coulomb field, due to non-linear quantum electrodynamics effects, as an opportunity for a pedagogical discussion of the electrodynamical analog of the Aichelburg-Sexl ultraboost. 
M.V. Kozyulin and Z.K. Silagadze
hep-ph gr-qc