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Proceedings Paper

GI2T/REGAIN spectro-interferometry with a new infrared beam combiner
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Paper Abstract

We have built an infrared beam combiner for the GI2T/REGAIN interferometer of the Observatoire de la Cote d'Azur. The beam controller allows us to record spectrally dispersed Michelson interference fringes in the near-infrared J-, H- or K-bands. The beam combiner has the advantage that Michelson interferograms can simultaneously be recorded in about 128 different spectral channels. The tilt of the spectrally dispersed fringes is a measure of the instantaneous optical path difference. We present the optical design of the beam combiner and GI2T/REGAIN observations of the Mira star R Cas with this beam combiner in the spectral range of 2.00 micrometers - 2.18 micrometers (observations on 22 and 25 August 1999; variability phase 0.08; V-magnitude approximately 6; seven baselines between 12 m and 24 m; reference stars Vega and (beta) Peg).

Paper Details

Date Published: 5 July 2000
PDF: 10 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390261
Show Author Affiliations
Gerd Weigelt, Max-Planck-Institut fuer Radioastronomie (Germany)
Denis Mourard, Observatoire de la Cote d'Azur (France)
Lyu Abe, Observatoire de la Cote d'Azur (France)
Udo Beckmann, Max-Planck-Institut fuer Radioastronomie (Germany)
Olivier Chesneau, Max-Planck-Institut fuer Radioastronomie (Germany)
C. Hillemanns, Max-Planck-Institut fuer Radioastronomie (Germany)
Karl-Heinz Hofmann, Max-Planck-Institut fuer Radioastronomie (Germany)
Sam D. Ragland, Observatoire de la Cote d'Azur (France)
Dieter Schertl, Max-Planck-Institut fuer Radioastronomie (Germany)
Michael Scholz, Univ. Heidelberg (Germany)
Philippe Stee, Observatoire de la Cote d'Azur (France)
Nathalie D. Thureau, Observatoire de la Cote d'Azur (United Kingdom)
Farrokh Vakili, Observatoire de la Cote d'Azur (France)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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