Sphere: complete laboratory performance and prediction for on-sky first light

Jean-François Sauvage 1 Jean-Luc Beuzit 1 Ronald Roelfsema 2 Markus Feldt Kjetil Dohlen 3 David Mouillet 4 Pascal Puget 5 François Wildi 6 Lyu Abe 7 Andrea Baruffolo 8 Pierre Baudoz 9 Andreas Bazzon Anthony Boccaletti 10 Tristan Buey Marcel Carbillet 7 Julien Charton 4 Riccardo Claudi Anne Costille 3 Alain Delboulbe 5 Silvano Desidera Carsten Dominik Mark Downing 11 Christophe Fabron 12 Philippe Feautrier 5 Enrico Fedrigo 11 Thierry Fusco 13 Enrico Giro Laurence Gluck 14 Raffaele Gratton Thomas Henning 15 Norbert Hubin 11 Markus Kasper 11 Anne-Marie Lagrange 16 Maud Langlois 3, 17 David Le Mignant 3 Jean-Louis Lizon Fabrice Madec 3 Yves Magnard 4 Patrice Martinez Dino Mesa Ole Möller-Nilsson Thibaut Moulin 4 Claire Moutou 3 Alexey Pavlov Denis Perret Cyril Petit 18 Johan Pragt Patrick Rabou 19 Sylvain Rochat 4 Bernardo Salasnich 8 Gérard Rousset 20 Hans-Martin Schmid Arnaud Sevin 20 Christian Soenke 11 Eric Stadler Marcos Suarez Massimo Turatto Stephane Udry 6 Arthur Vigan 3 Farrokh Vakili 21 Gerard Zins 22 Alice Zurlo Andrea Bazzon Anne Lagrange Stuart Shaklan
Abstract : Direct imaging of exoplanet is one of the most exciting field of planetology today. The light coming from exoplanet orbiting their host star witnesses for the chemical composition of the atmosphere, and the potential biomarkers for life. However, the faint flux to be imaged, very close to the huge flux of the parent star, makes this kind of observation extremely difficult to perform from the ground. The direct imaging instruments (SPHERE [1], GPI [2]) are nowaday reaching lab maturity. Such instrument imply the coordination of XAO for atmospherical turbulence real-time correction, coronagraphy for star light extinction, IR Dual band camera, IFS, and visible polarimetry. The imaging modes include single and double difference (spectral and angular). The SPHERE project is now at the end of AIT phase. This paper presents the very last results obtained in laboratory, with realistic working conditions. These AIT results allows one to predict on-sky performance, that should come within the next weeks after re-installation at Very Large Telescope at Paranal.
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Jean-François Sauvage, Jean-Luc Beuzit, Ronald Roelfsema, Markus Feldt, Kjetil Dohlen, et al.. Sphere: complete laboratory performance and prediction for on-sky first light. SPIE Optical Engineering + Applications, Aug 2013, San Diego, United States. pp.88640B, ⟨10.1117/12.2025562⟩. ⟨hal-02118403⟩



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