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Proceedings Paper

Astronomical uses of integral field spectrography: present applications at CFHT and future developments
Author(s): Christian Vanderriest; Roland Bacon; Yvon Georgelin; Etienne LeCoarer; Guy J. Monnet
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Paper Abstract

Since the digital detectors (like CCDs) presently available for astronomical instruments have two dimensions only, there is an obvious problem for obtaining detailed spectroscopic information on extended astronomical objects (e.g. active galaxies, regions of star formation, globular clusters, etc.); the classical long- slit spectrographic techniques are grossly inadequate. Several so-called integral field spectrographs (IFS) have been used at the Canada-France-Hawaii telescope during the past years to improve this situation. They typically provide hundreds of spectra in a small (approximately 10' by 10') field with a subarcsecond spatial resolution capability and hundreds of spectral elements, both simultaneously accessed. We describe these various instruments and their present performances, review a few illustrative results obtained with CFH telescope and discuss the expected developments: use of IFS in combination with adaptive optics systems for the study of individual objects at spatial resolution near the 0.1' level, as well as their potential capabilities on Very Large Telescopes, with or without adaptive optics.

Paper Details

Date Published: 1 June 1994
PDF: 9 pages
Proc. SPIE 2198, Instrumentation in Astronomy VIII, (1 June 1994); doi: 10.1117/12.176823
Show Author Affiliations
Christian Vanderriest, Observatoire de Paris-Meudon and Canada-France-Hawaii Telescope Corp. (United States)
Roland Bacon, Observatoire de Lyon (France)
Yvon Georgelin, Observatoire de Marseille (France)
Etienne LeCoarer, Observatoire de Grenoble (France)
Guy J. Monnet, Observatoire de Lyon (Germany)

Published in SPIE Proceedings Vol. 2198:
Instrumentation in Astronomy VIII
David L. Crawford; Eric R. Craine, Editor(s)

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