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Paper Abstract

We are working towards imaging the surfaces and circumstellar envelopes of Mira stars in the near-infrared, using the IOTA interferometer and the IONIC integrated-optics 3-beam combiner. In order to study atmospheric structures of these stars, we installed 3 narrow-band filters that subdivide H-band into 3 roughly equal-width sub-bands - a central one for continuum, and 2 adjacent ones to sample Mira star's (mostly water) absorption-bands. We present here our characterization of the IOTA 3-Telescope interferometer for closure-phase measurements with broad and narrow-band filters in the H atmospheric window. This includes characterizing the stability, chromaticity, and polarization effects of the present IOTA optics with the IONIC beam-combiner, and characterizing the accuracy of our closure phase measurements.

Paper Details

Date Published: 20 October 2004
PDF: 8 pages
Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.552447
Show Author Affiliations
Sam Ragland, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Wesley Arthur Traub, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Jean-Philippe Berger, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Rafael Millan-Gabet, California Institute of Technology (United States)
John D. Monnier, Univ. of Michigan (United States)
Ettore Pedretti, Univ. of Michigan (United States)
F. Peter Schloerb, Univ. of Massachusetts/Amherst (United States)
Nathaniel P. Carleton, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Pierre Haguenauer, Alcatel Space (France)
Pierre Y. Kern, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Pierre R. Labeye, CEA-LETI (France)
Marc G. Lacasse, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Fabien Malbet, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)
Karine Rousselet-Perraut, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)


Published in SPIE Proceedings Vol. 5491:
New Frontiers in Stellar Interferometry
Wesley A. Traub, Editor(s)

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