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Proceedings Paper

SPHERE IFS: the spectro differential imager of the VLT for exoplanets search
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Paper Abstract

SPHERE is an exo-solar planet imager, which goal is to detect giant exo-solar planets in the vicinity of bright stars and to characterize them through spectroscopic and polarimetric observations. It is a complete system with a core made of an extreme-Adaptive Optics (AO) turbulence correction, pupil tracker and interferential coronagraphs. At its back end, a differential dual imaging camera and an integral field spectrograph (IFS) work in the Near Infrared (NIR) Y, J, H and Ks bands (0.95 - 2.32μm) and a high resolution polarization camera covers the visible (0.6 - 0.9 μm). The IFS is a low resolution spectrograph (R~50 and R~30) which works in the near IR (0.95-1.7 microns), an ideal wavelength range for the detection of planetary features. In our baseline design the IFU is a new philosophy microlens array of about 145x145 elements designed to reduce as low as possible the contrast. The IFU will cover a field of view of about 1.8 x 1.8 square arcsecs reaching a contrast of 10-7, giving an high contrast and high spatial resolution "imager" able to search for planet well inside the star PSF.

Paper Details

Date Published: 23 July 2008
PDF: 11 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70143E (23 July 2008); doi: 10.1117/12.788366
Show Author Affiliations
R. U. Claudi, INAF - Osservatorio Astronomico di Padova (Italy)
M. Turatto, INAF - Osservatorio Astrofisico di Catania (Italy)
R. G. Gratton, INAF - Osservatorio Astronomico di Padova (Italy)
J. Antichi, INAF - Osservatorio Astronomico di Padova (Italy)
M. Bonavita, INAF - Osservatorio Astronomico di Padova (Italy)
P. Bruno, INAF - Osservatorio Astrofisico di Catania (Italy)
E. Cascone, INAF - Osservatorio Astronomico di Capodimonte (Italy)
V. De Caprio, INAF - IASF sezione di Milano (Italy)
S. Desidera, INAF - Osservatorio Astronomico di Padova (Italy)
E. Giro, INAF - Osservatorio Astronomico di Padova (Italy)
D. Mesa, INAF - Osservatorio Astronomico di Padova (Italy)
S. Scuderi, INAF - Osservatorio Astrofisico di Catania (Italy)
K. Dohlen, Lab. d'Astrophysique de Marseille (France)
J. L. Beuzit, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
P. Puget, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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