Planck early results. III. First assessment of the Low Frequency Instrument in-flight performance

Mennella, A; Bersanelli, M; Butler, Rc; Curto, A; Cuttaia, F; Davis, Rj; Dick, J; Frailis, M; Galeotta, S; Gregorio, A; Kurki Suonio, H; Lawrence, Cr; Leach, S; Leahy, Jp; Lowe, S; Maino, D; Mandolesi, N; Maris, M; Martinez Gonzalez, E; Meinhold, Pr; Morgante, G; Pearson, D; Perrotta, F; Polenta, G; Poutanen, T; Sandri, M; Seiffert, Md; Suur Uski, As; Tavagnacco, D; Terenzi, Luca; Tomasi, M; Valiviita, J; Villa, F; Watson, R; Wilkinson, A; Zacchei, A; Zonca, A; Aja, B; Artal, E; Baccigalupi, C; Banday, Aj; Barreiro, Rb; Bartlett, Jg; Bartolo, N; Battaglia, P; Bennett, K; Bonaldi, A; Bonavera, L; Borrill, J; Bouchet, Fr; Burigana, C; Cabella, P; Cappellini, B; Chen, X; Colombo, L; Cruz, M; Danese, L; D'Arcangelo, O; Davies, Rd; de Gasperis, G; de Rosa, A; de Zotti, G; Dickinson, C; Diego, Jm; Donzelli, S; Efstathiou, G; Ensslin, Ta; Eriksen, Hk; Falvella, Mc; Finelli, F; Foley, S; Franceschet, C; Franceschi, E; Gaier, Tc; Genova Santos, Rt; George, D; Gomez, F; Gonzalez Nuevo, J; Gorski, Km; Gruppuso, A; Hansen, Fk; Herranz, D; Herreros, Jm; Hoyland, Rj; Hughes, N; Jewell, J; Jukkala, P; Juvela, M; Kangaslahti, P; Keihanen, E; Keskitalo, R; Kilpia, Vh; Kisner, Ts; Knoche, J; Knox, L; Laaninen, M; Lahteenmaki, A; Lamarre, Jm; Leonardi, R; Leon Tavares, J; Leutenegger, P; Lilje, Pb; Lopez Caniego, M; Lubin, Pm; Malaspina, M; Marinucci, D; Massardi, M; Matarrese, S; Matthai, F; Melchiorri, A; Mendes, L; Miccolis, M; Migliaccio, M; Mitra, S; Moss, A; Natoli, P; Nesti, R; Norgaard Nielsen, Hu; Pagano, L; Paladini, R; Paoletti, D; Partridge, B; Pasian, F; Pettorino, V; Pietrobon, D; Pospieszalski, M; Prezeau, G; Prina, M; Procopio, P; Puget, Jl; Quercellini, C; Rachen, Jp; Rebolo, R; Reinecke, M; Ricciardi, S; Robbers, G; Rocha, G; Roddis, N; Rubino Martin, Ja; Savelainen, M; Scott, D; Silvestri, R; Simonetto, A; Sjoman, P; Smoot, Gf; Sozzi, C; Stringhetti, L; Tauber, Ja; Tofani, G; Toffolatti, L; Tuovinen, J; Turler, M; Umana, G; Valenziano, L; Varis, J; Vielva, P; Vittorio, N; Wade, La; Watson, C; White, Sdm; Winder, F.