Collaboration, Planck, N. Aghanim, M. Ashdown, J. Aumont, C. Baccigalupi, M. Ballardini, A. J. Banday, et al. (2016) 2016. “Planck Intermediate Results. XLVI. Reduction of Large-Scale Systematic Effects in HFI Polarization Maps and Estimation of the Reionization Optical Depth”. \aap 596: A107. doi:10.1051/0004-6361/201628890.