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Proceedings Paper

S4EI (Spectral Sampling with Slicer for Stellar and Extragalactical Instrumentation), a new-generation of 3D spectro-imager dedicated to night astronomy
Author(s): Frédéric Sayède; Mathieu Puech; Pierre Mein; Piercarlo Bonifacio; Jean-Marie Malherbe; Raphaël Galicher; Jean-Philippe Amans; Gilles Fasola
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Paper Abstract

Multichannel Subtractive Double Pass (MSDP) spectrographs have been widely used in solar spectroscopy because of their ability to provide an excellent compromise between field of view and spatial and spectral resolutions. Compared with other types of spectrographs, MSDP can deliver simultaneous monochromatic images at higher spatial and spectral resolutions without any time-scanning requirement (as with Fabry-Perot spectrographs), and with limited loss of flux. These performances are obtained thanks to a double pass through the dispersive element. Recent advances with VPH (Volume phase holographic) Grisms as well as with image slicers now make MSDP potentially sensitive to much smaller fluxes. We present S4EI (Spectral Sampling with Slicer for Stellar and Extragalactical Instrumentation), which is a new concept for extending MSDP to night-time astronomy. It is based on new generation reflecting plane image slicers working with large apertures specific to night-time telescopes. The resulting design could be potentially very attractive and innovative for different domains of astronomy, e.g., the simultaneous spatial mapping of accurately flux-calibrated emission lines between OH sky lines in extragalactic astronomy or the simultaneous imaging of stars, exoplanets and interstellar medium. We present different possible MSDP/S4EI configurations for these science cases and expected performances on telescopes such as the VLT.

Paper Details

Date Published: 8 July 2014
PDF: 11 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91473O (8 July 2014); doi: 10.1117/12.2055121
Show Author Affiliations
Frédéric Sayède, GEPI, Observatoire de Paris à Meudon (France)
Mathieu Puech, GEPI, Observatoire de Paris à Meudon (France)
Pierre Mein, LESIA, Observatoire de Paris (France)
Piercarlo Bonifacio, GEPI, Observatoire de Paris à Meudon (France)
Jean-Marie Malherbe, LESIA, Observatoire de Paris (France)
Raphaël Galicher, LESIA, Observatoire de Paris (France)
Jean-Philippe Amans, GEPI, Observatoire de Paris à Meudon (France)
Gilles Fasola, GEPI, Observatoire de Paris à Meudon (France)


Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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