14 July 2010 SITELLE: a wide-field imaging Fourier transform spectrometer for the Canada-France-Hawaii Telescope
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Abstract
We describe the concept of a new instrument for the Canada-France-Hawaii telescope (CFHT), SITELLE (Spectromètre Imageur à Transformée de Fourier pour l'Etude en Long et en Large de raies d'Emission), as well as a science case and a technical study of its preliminary design. SITELLE will be an imaging Fourier transform spectrometer capable of obtaining the visible (350 nm - 950 nm) spectrum of every source of light in a field of view of 15 arcminutes, with 100% spatial coverage and a spectral resolution ranging from R = 1 (deep panchromatic image) to R = 104 (for gas dynamics). SITELLE will cover a field of view 100 to 1000 times larger than traditional integral field spectrographs, such as GMOS-IFU on Gemini or the future MUSE on the VLT. It is a legacy from BEAR, the first imaging FTS installed on the CFHT and the direct successor of SpIOMM, a similar instrument attached to the 1.6-m telescope of the Observatoire du Mont-Mégantic in Québec. SITELLE will be used to study the structure and kinematics of HII regions and ejecta around evolved stars in the Milky Way, emission-line stars in clusters, abundances in nearby gas-rich galaxies, and the star formation rate in distant galaxies.
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L. Drissen, A.-P. Bernier, L. Rousseau-Nepton, A. Alarie, C. Robert, G. Joncas, S. Thibault, F. Grandmont, "SITELLE: a wide-field imaging Fourier transform spectrometer for the Canada-France-Hawaii Telescope", Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77350B (14 July 2010); doi: 10.1117/12.856470; https://doi.org/10.1117/12.856470
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