20 October 2004 Characterizing closure-phase measurements at IOTA
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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.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sam Ragland, Sam Ragland, Wesley Arthur Traub, Wesley Arthur Traub, Jean-Philippe Berger, Jean-Philippe Berger, Rafael Millan-Gabet, Rafael Millan-Gabet, John D. Monnier, John D. Monnier, Ettore Pedretti, Ettore Pedretti, F. Peter Schloerb, F. Peter Schloerb, Nathaniel P. Carleton, Nathaniel P. Carleton, Pierre Haguenauer, Pierre Haguenauer, Pierre Y. Kern, Pierre Y. Kern, Pierre R. Labeye, Pierre R. Labeye, Marc G. Lacasse, Marc G. Lacasse, Fabien Malbet, Fabien Malbet, Karine Rousselet-Perraut, Karine Rousselet-Perraut, } "Characterizing closure-phase measurements at IOTA", Proc. SPIE 5491, New Frontiers in Stellar Interferometry, (20 October 2004); doi: 10.1117/12.552447; https://doi.org/10.1117/12.552447
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