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dc.contributor.authorSpalding, Eckhart
dc.contributor.authorHinz, Phil
dc.contributor.authorMorzinksi, Katie
dc.contributor.authorErtel, Steve
dc.contributor.authorGrenz, Paul
dc.contributor.authorMaier, Erin
dc.contributor.authorStone, Jordan
dc.contributor.authorVaz, Amali
dc.date.accessioned2020-03-25T20:38:20Z
dc.date.available2020-03-25T20:38:20Z
dc.date.issued2019-09-09
dc.identifier.citationEckhart Spalding, Phil Hinz, Katie Morzinksi, Steve Ertel, Paul Grenz, Erin Maier, Jordan Stone, and Amali Vaz "Status of commissioning stabilized infrared Fizeau interferometry with LBTI", Proc. SPIE 11117, Techniques and Instrumentation for Detection of Exoplanets IX, 111171S (9 September 2019); https://doi.org/10.1117/12.2529808en_US
dc.identifier.issn0277-786X
dc.identifier.doi10.1117/12.2529808
dc.identifier.urihttp://hdl.handle.net/10150/638073
dc.description.abstractThe Large Binocular Telescope Interferometer (LBTI) has the longest baseline in the world-22.7 m-for performing astronomical interferometry in Fizeau mode, which involves beam combination in a focal plane and preserves a wide field-of-view. LBTI can operate in this mode at wavelengths of 1.2-5 and 8-12 mu m, making it a unique platform for carrying out high-resolution imaging of circumstellar disks, evolved stars, solar system objects, and possibly searches for planets, in the thermal infrared. Over the past five years, LBTI has carried out a considerable number of interferometric observations by combining the beams near a pupil plane to carry out nulling interferometry. This mode is useful for measuring small luminosity level offsets, such as those of exozodiacal dust disks. The Fizeau mode, by contrast, is more useful for generating an image of the target because it has more (u, v) (Fourier) plane coverage. However, the Fizeau mode is still in an ongoing process of commissioning. Sensitive Fizeau observations require active phase control, increased automation, and the removal of non-common-path aberrations (NCPA) between the science and phase beams. This increased level of control will increase the fringe contrast, enable longer integrations, and reduce time overheads. We are in the process of writing a correction loop to remove NCPA, and have carried out tests on old and synthetic data. We have also carried out on-sky Fizeau engineering tests in fall 2018 and spring 2019. In this article, we share lessons learned and strategies developed as a result of these tests.en_US
dc.language.isoenen_US
dc.publisherSPIE-INT SOC OPTICAL ENGINEERINGen_US
dc.rightsCopyright © (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.en_US
dc.sourceTechniques and Instrumentation for Detection of Exoplanets IX
dc.subjectinfrareden_US
dc.subjectinterferometryen_US
dc.subjectFizeauen_US
dc.subjectLBTen_US
dc.titleStatus of commissioning stabilized infrared Fizeau interferometry with LBTIen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Steward Observen_US
dc.contributor.departmentUniv Arizona, Ctr Astron Adapt Opten_US
dc.identifier.journalTECHNIQUES AND INSTRUMENTATION FOR DETECTION OF EXOPLANETS IXen_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
refterms.dateFOA2020-03-25T20:38:23Z


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