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Plachy, E. Poggio, E. Poretti, E. Poujoulet, E. Racero, E. Salguero, E. Sciacca, E. Slezak, E. Solano, E. Szegedi-Elek, E. Utrilla, E. van, F. Arenou, F. Crifo, F. De, F. De Luise, F. Figueras, F. Fragkoudi, F. Franke, F. Jansen, F. Julbe, F. Marocco, F. Mignard, F. Pailler, F. Riclet, F. Royer, F. Solitro, F. Spoto, F. Taris, F. Th\\'evenin, F. Torra, F. van Leeuwen, F.-X. Pineau, Gaia Collaboration: X. Luri, G. Altavilla, G. Busso, G. Clementini, G. Comoretto, G. Fedorets, G. Gilmore, G. Giuffrida, G. Gracia-Abril, G. Holland, G. Jasniewicz, G. Jevardat de Fombelle, G. Kordopatis, G.M. Seabroke, G. Orr\\`u, G. Plum, G. Rixon, G. Sadowski, G. Tauran, H. C\\'anovas, H.E. Delgado, H.E. Huckle, H. Enke, H.E.P. Lindstr{\\o}m, H.I. Siddiqui, H. Steidelm\\\"uller, H. Zhao, I.A. Steele, I. Bellas-Velidis, I. Gonzalez-Santamaria, I. Lecoeur-Taibi, I. Musella, I. Pagano, J. \\'Alvarez Cid-Fuentes, J. Alves, J. Bakker, J.-B. Delisle, J. Berthier, J. Casta\\~neda, J.C. Segovia, J. De Ridder, J. Fern\\'andez-Hern\\'andez, J.-F. Le Campion, J. Gonz\\'alez-N\\'u\\~nez, J. Guiraud, J. Hern\\'andez, J.H.J. de, J.J. Aguado, J.J. Gonz\\'alez-Vidal, J. Juaristi, J.-L. Bassilana, J.-L. Halbwachs, J.M. Carrasco, J.M. Marchant, J.M. Mart\\'in-Fleitas, J. Osinde, J. Portell, J. Rybizki, J. Sahlmann, J. Salgado, J. Souchay, J. Torra, J. Zorec, K.A. Rybicki, K. Benson, K. Jan{\\ss}en, K. Kruszy\\'nska, K. Muinonen, K. Nienartowicz, L. Balaguer-N\\'u\\~nez, L. Bianchi, L. Bramante, L. Casamiquela, L. Chaoul, L. Chemin, L. Delchambre, L. Eyer, L. Galluccio, L. Karbevska, L. Lindegren, L. Martin Polo, L. Moln\\'ar, L.M. Sarro, L. Noval, L. Palaversa, L.P. Guy, L. Pulone, L. Rimoldini, L. Rohrbasser, L. Siltala, L. Szabados, {\\L}. Wyrzykowski, M.A. \\'Alvarez, M.A. Barstow, M. Ajaj, M. Altmann, M. Audard, M. Barros, M. Bellazzini, M. Bernet, M. Biermann, M.B. Taylor, M. Castellani, M. Cropper, M. Crosta, M. David, M. Davidson, M. Fabrizio, M. Fouesneau, M. Gai, M. Garcia-Reinaldos, M. Garc\\'ia-Torres, M.G. Lattanzi, M. Granvik, M. Hauser, M. Haywood, M.I Carnerero, M. Kontizas, M. Manteiga, M. Marconi, M.M.S. Marcos, M. Pawlak, M. Rainer, M. Ramos-Lerate, M. Riello, M.-R.L. Cioni, M. Roelens, M. Romero-G\\'omez, M. Sarasso, M. Schultheis, M. Segol, M. Smith, M. S\\\"uveges, M. Vaillant, M. van Leeuwen, M. Weiler, N.A. Walton, N. Bauchet, N. Brouillet, N.C. Hambly, N. Cheek, N. H{\\l}adczuk, N. Leclerc, N. Mowlavi, N. Rambaux, N.R. Millar, N. Robichon, N. Rowell, N. Samaras, N. Sanna, N. Tonello, N. Unger, O.L. Creevey, O. Marchal, O. Vanel, P.A. Palicio, P. Castro Sampol, P. Charlot, P. David, P. de Laverny, P. de Teodoro, P. Di Matteo, P. Esquej, P. Fernique, P. Garc\\'ia-Lario, P. Gavras, P. Giacobbe, P.G. Jonker, P.J. McMillan, P.J. Richards, P. Kervella, P. Madrero, P.M. Marrese, P. Montegriffo, P. Osborne, P. Panuzzo, P. Ramos, P. Re, P. Sartoretti, P. Tanga, P.W. Burgess, P. Yvard, R. Andrae, R. Blomme, R. Buzzi, R. Cancelliere, R. Carballo, R. De March, R. de Souza, R. Drimmel, R. Geyer, R.G. Mann, R. Guerra, R. Guti\\'errez-S\\'anchez, R. Haigron, R.I. Anderson, R.L. Smart, R. Messineo, R. Molinaro, R. Mor, R. Morbidelli, R. Santove\\~na, R. Sordo, R. Teixeira, S. Accart, S.A. Klioner, S. Bartolom\\'e, S. Bertone, S. Blanco-Cuaresma, S. Bouquillon, S. Cowell, S. Diakite, S. Faigler, S.G. Baker, S. Girona, S. Jordan, S. Khanna, S. Lambert, S. Leccia, S.L. Hidalgo, S. Liao, S. Managau, S. Marinoni, S. Messina, S. Ragaini, S. Randich, S. Regibo, S.T. Hodgkin, S. Voutsinas, S. Zucker, T.A. Lister, T. Antoja, T. Boch, T. Cantat-Gaudin, T. Carlucci, T. Cornez, T. Hilger, T. Lebzelter, T. Mazeh, T. Morel, T. Muraveva, T. Pauwels, T. Prusti, T. Roegiers, T. Wevers, T. Zwitter, U. Abbas, U. Bastian, U. Becciani, U. Heiter, U. Lammers, V. Ripepi, V. Sanchez, W.J. Cooper, W. L\\\"offler, W. Roux, W. Thuillot, W. van Reeven, X. Pe\\~nalosa, Y. Damerdji, Y. Fr\\'emat, Y. Lasne, Y. Lebreton, Y. Le Fustec, Y. Viala, Z. Balog, Z. 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