Aaron Labdon,1 John D. Monnier,2 Stefan Kraus,1 Jean-Baptiste Le Bouquin,3 Benjamin R. Setterholmhttps://orcid.org/0000-0001-5980-0246,2 Narsireddy Anuguhttps://orcid.org/0000-0002-2208-6541,4 Theo ten Brummelaar,5 Cyprien Lanthermann,6 Claire L. Davies,1 Jacob Ennis,2 Tyler Gardner,2 Gail H. Schaefer,5 Laszlo Sturmann,5 Judit Sturmann5
1Univ. of Exeter (United Kingdom) 2Univ. of Michigan (United States) 3Institut de Planétologie et d’Astrophysique de Grenoble (France) 4Steward Observatory, The Univ. of Arizona (United States) 5The CHARA Array of Georgia State Univ., Mount Wilson Observatory (United States) 6KU Leuven (Belgium)
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In this contribution we report on our work to increase the spectral range of the Michigan Infrared Combiner- eXeter (MIRC-X) instrument at the CHARA array to allow for dual H and J band interferometric observations. We comment on the key science drivers behind this project and the methods of characterisation and correction of instrumental birefringence and dispersion. In addition, we report on the first results from on-sky commissioning in November 2019.
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Aaron Labdon, John D. Monnier, Stefan Kraus, Jean-Baptiste Le Bouquin, Benjamin R. Setterholm, Narsireddy Anugu, Theo ten Brummelaar, Cyprien Lanthermann, Claire L. Davies, Jacob Ennis, Tyler Gardner, Gail H. Schaefer, Laszlo Sturmann, Judit Sturmann, "A new frontier for J-band interferometry: dual-band NIR interferometry with MIRC-X," Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114460H (13 December 2020); https://doi.org/10.1117/12.2561371