Cosmic Strings Lens Phenomenology Revisited
  We present investigations of lens phenomenological properties of cosmic strings for deep galaxy surveys. General results that have obtained for lineic energy distribution are presented first. We stress that generically the local convergence always vanishes in presence of strings although there might be some significant distortions. We then propose a simplified model of strings, we call ``Poisson strings'', for which exhaustive investigations can be done either numerically or analytically. 
Francis Bernardeau (SPhT Saclay), Jean-Philippe Uzan (LPT Orsay)