Characterization of the in-flight properties of the Planck telescope J. A. Tauber, P. H. Nielsen, A. Martín-Polegre, B. Crill, F. Cuttaia, K. Ganga, J. Gudmundsson, W. Jones, C. Lawrence, P. Meinhold et al. (15 more) A&A, 622 (2019) A55 Published online: 29 January 2019 DOI: 10.1051/0004-6361/201833150