First results and current development of SpIOMM: an imaging Fourier transform spectrometer for astronomy

A.-P. Bernier; F. Grandmont; J.-F. Rochon; M. Charlebois; L. Drissen

doi:10.1117/12.671410

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29 June 2006 First results and current development of SpIOMM: an imaging Fourier transform spectrometer for astronomy

A.-P. Bernier, F. Grandmont, J.-F. Rochon, M. Charlebois, L. Drissen

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Proceedings Volume 6269, Ground-based and Airborne Instrumentation for Astronomy; 626949 (2006) https://doi.org/10.1117/12.671410
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

We present an overview of SpIOMM, an Imaging Fourier Transform Spectrometer (IFTS) for astronomy developed at University Laval in collaboration with ABB, INO and the Canadian Space Agency. SpIOMM, attached to the 1.6 meter (f/8) telescope at the Observatoire du mont Megantic in Quebec. It is a Michelson-type interferometer capable of obtaining the visible spectrum (from 350 nm to 900 nm) of every light source within its 12 arcminute circular field of view. This design will allow the correction of variable sky transmission. It consists of a dual output port and the total throughput is exploited by two CCDs used as detectors. We present the concept and design of this unique instrument. A metrology system combined with a dynamic alignment assures a good sampling and mirror alignment during the entire acquisition sequence. This particular servo control is explained and demonstrated and its capabilities and performance are discussed. We introduce the use of specific bandpass filters centered on the most important groups of emission lines which, when combined with spectral folding algorithms, allows us to reach high spectral resolution (R = 25 000, or 1 cm^-1). Astronomical data collected by SpIOMM in 2004-2005 are also presented.

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A.-P. Bernier, F. Grandmont, J.-F. Rochon, M. Charlebois, and L. Drissen "First results and current development of SpIOMM: an imaging Fourier transform spectrometer for astronomy", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 626949 (29 June 2006); https://doi.org/10.1117/12.671410

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