Planck 2015 results. XXVI. The Second Planck Catalogue of Compact Sources

P.A.R. Ade, N. Aghanim, F. Argüeso, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A.J. Banday, R.B. Barreiro, N. Bartolo, Per Rex Christensen, Anne Mette Frejsel, Pavel Nasselski, Igor Dmitrievich Novikov, Hans Ulrik Nørgaard-Nielsen