A new analysis of quasar polarisation alignments
  We propose a new method to analyse the alignment of optical polarisation vectors from quasars. This method leads to a definition of intrinsic preferred axes and to a determination of the probability $p^{\sigma}$ that the distribution of polarisation directions is random. This probability is found to be as low as 0.003% for one of the regions of redshift. 
Vincent Pelgrims and Jean-Rene Cudell
astro-ph.CO