Tauber, J.A. and Norgaard-Nielsen, H.U. and Ade, P.A.R. and Amiri Parian, J. and Banos, T. and Bersanelli, M. and Burigana, C. and Chamballu, A. and de Chambure, D. and Christensen, P.R. and Corre, O. and Cozzani, A. and Crill, B. and Crone, G. and D'Arcangelo, O. and Daddato, R. and Doyle, D. and Dubruel, D. and Forma, G. and Hills, R. and Huffenberger, K. and Jaffe, A.H. and Jessen, N. and Kletzkine, P. and Lamarre, J.M. and Leahy, J.P. and Longval, Y. and deMaagt, P. and Maffei, B. and Mandolesi, N. and Marti-Canales, J. and Martin-Polegre, A. and Martin, P. and Mendes, L. and Murphy, J.A. and Nielsen, P. and Noviello, F. and Paquay, M. and Peacocke, T. and Ponthieu, N. and Pontoppidan, k. and Ristorcelli, I. and Riti, J.-B. and Rolo, L. and Rosset, C. and Sandri, M. and Savini, G. and Sudiwala, R. and Tristram, M. and Valenziano, L. and van der Vorst, M. and van 't Klooster, K. and Villa, F. and Yurchenko, V.
Planck pre-launch status: The optical system.
Astronomy & Astrophysics, 520 (A2).
Planck is a scientific satellite that represents the next milestone in space-based research related to the cosmic microwave background, and in many
other astrophysical fields. Planck was launched on 14 May of 2009 and is now operational. The uncertainty in the optical response of its detectors
is a key factor allowing Planck to achieve its scientific objectives. More than a decade of analysis and measurements have gone into achieving
the required performances. In this paper, we describe the main aspects of the Planck optics that are relevant to science, and the estimated in-flight
performance, based on the knowledge available at the time of launch. We also briefly describe the impact of the major systematic effects of optical
origin, and the concept of in-flight optical calibration. Detailed discussions of related areas are provided in accompanying papers.
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