Planck pre-launch status: Expected LFI polarisation capability J. P. Leahy, M. Bersanelli, O. D'Arcangelo, K. Ganga, S. M. Leach, A. Moss, E. Keihänen, R. Keskitalo, H. Kurki-Suonio, T. Poutanen et al. (28 more) A&A, 520 (2010) A8 Published online: 15 September 2010 DOI: 10.1051/0004-6361/200912855