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SPHERE: the exoplanet imager for the Very Large Telescope

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arxiv 1902.04080 v2 pith:XPMV3CO4 submitted 2019-02-11 astro-ph.IM astro-ph.EP

SPHERE: the exoplanet imager for the Very Large Telescope

J.-L. Beuzit , A. Vigan , D. Mouillet , K. Dohlen , R. Gratton , A. Boccaletti , J.-F. Sauvage , H. M. Schmid
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M. Langlois C. Petit A. Baruffolo M. Feldt J. Milli Z. Wahhaj L. Abe U. Anselmi J. Antichi R. Barette J. Baudrand P. Baudoz A. Bazzon P. Bernardi P. Blanchard R. Brast P. Bruno T. Buey M. Carbillet M. Carle E. Cascone F. Chapron G. Chauvin J. Charton R. Claudi A. Costille V. De Caprio A. Delboulb\'e S. Desidera C. Dominik M. Downing O. Dupuis C. Fabron D. Fantinel G. Farisato P. Feautrier E. Fedrigo T. Fusco P. Gigan C. Ginski J. Girard E. Giro D. Gisler L. Gluck C. Gry T. Henning N. Hubin E. Hugot S. Incorvaia M. Jaquet M. Kasper E. Lagadec A.-M. Lagrange H. Le Coroller D. Le Mignant B. Le Ruyet G. Lessio J.-L. Lizon M. Llored L. Lundin F. Madec Y. Magnard M. Marteaud P. Martinez D. Maurel F. M\'enard D. Mesa O. M\"oller-Nilsson T. Moulin C. Moutou A. Orign\'e J. Parisot A. Pavlov D. Perret J. Pragt P. Puget P. Rabou J. Ramos J.-M. Reess F. Rigal S. Rochat R. Roelfsema G. Rousset A. Roux M. Saisse B. Salasnich E. Santambrogio S. Scuderi D. Segransan A. Sevin R. Siebenmorgen C. Soenke E. Stadler M. Suarez D. Tiph\`ene M. Turatto S. Udry F. Vakili L. B. F. M. Waters L. Weber F. Wildi G. Zins A. Zurlo
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keywords designedexoplanetsimagerlargelightsphereadaptivecircumstellar
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Observations of circumstellar environments to look for the direct signal of exoplanets and the scattered light from disks has significant instrumental implications. In the past 15 years, major developments in adaptive optics, coronagraphy, optical manufacturing, wavefront sensing and data processing, together with a consistent global system analysis have enabled a new generation of high-contrast imagers and spectrographs on large ground-based telescopes with much better performance. One of the most productive is the Spectro-Polarimetic High contrast imager for Exoplanets REsearch (SPHERE) designed and built for the ESO Very Large Telescope (VLT) in Chile. SPHERE includes an extreme adaptive optics system, a highly stable common path interface, several types of coronagraphs and three science instruments. Two of them, the Integral Field Spectrograph (IFS) and the Infra-Red Dual-band Imager and Spectrograph (IRDIS), are designed to efficiently cover the near-infrared (NIR) range in a single observation for efficient young planet search. The third one, ZIMPOL, is designed for visible (VIR) polarimetric observation to look for the reflected light of exoplanets and the light scattered by debris disks. This suite of three science instruments enables to study circumstellar environments at unprecedented angular resolution both in the visible and the near-infrared. In this work, we present the complete instrument and its on-sky performance after 4 years of operations at the VLT.

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