First light of the VLT planet finder SPHERE. IV. Physical and chemical properties of the planets around HR8799

Bonnefoy, M. and Zurlo, A. and Baudino, J. L. and Lucas, P. and Mesa, D. and Maire, A. -L. and Vigan, A. and Galicher, R. and Homeier, D. and Marocco, F. and Gratton, R. and Chauvin, G. and Allard, F. and Desidera, S. and Kasper, M. and Moutou, C. and Lagrange, A. -M. and Antichi, J. and Baruffolo, A. and Baudrand , J. and Beuzit, J. -L. and Boccaletti, A. and Cantalloube, F. and Carbillet, M. and Charton, J. and Claudi, R. U. and Costille, A. and Dohlen, K. and Dominik, C. and Fantinel, D. and Feautrier, P. and Feldt, M. and Fusco, T. and Gigan, P. and Girard, J. H. and Gluck, L. and Gry, C. and Henning, T. and Janson, M. and Langlois, M. and Madec, F. and Magnard, Y. and Maurel, D. and Mawet, D. and Meyer, M. R. and Milli, J. and Moeller-Nilsson, O. and Mouillet, D. and Pavlov, A. and Perret, D. and Pujet, P. and Quanz, S. P. and Rochat, S. and Rousset, G. and Roux, A. and Salasnich, B. and Salter, G. and Sauvage, J. -F. and Schmid, H. M. and Sevin, A. and Soenke, C. and Stadler, E. and Turatto, M. and Udry, S. and Vakili, F. and Wahhaj, Z. and Wildi, F.

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