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dc.contributor.authorDefrère, D.
dc.contributor.authorHinz, P.
dc.contributor.authorDowney, E.
dc.contributor.authorBöhm, M.
dc.contributor.authorDanchi, W. C.
dc.contributor.authorDurney, O.
dc.contributor.authorErtel, S.
dc.contributor.authorHill, J. M.
dc.contributor.authorHoffmann, W. F.
dc.contributor.authorMennesson, B.
dc.contributor.authorMillan-Gabet, R.
dc.contributor.authorMontoya, M.
dc.contributor.authorPott, J.-U.
dc.contributor.authorSkemer, A.
dc.contributor.authorSpalding, E.
dc.contributor.authorStone, J.
dc.contributor.authorVaz, A.
dc.date.accessioned2017-02-10T00:52:40Z
dc.date.available2017-02-10T00:52:40Z
dc.date.issued2016-08-04
dc.identifier.citationD. Defrère ; P. Hinz ; E. Downey ; M. Böhm ; W. C. Danchi ; O. Durney ; S. Ertel ; J. M. Hill ; W. F. Hoffmann ; B. Mennesson ; R. Millan-Gabet ; M. Montoya ; J.-U. Pott ; A. Skemer ; E. Spalding ; J. Stone and A. Vaz " Simultaneous water vapor and dry air optical path length measurements and compensation with the large binocular telescope interferometer ", Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 99071G (August 4, 2016); doi:10.1117/12.2233884; http://dx.doi.org/10.1117/12.2233884en
dc.identifier.issn0277-786X
dc.identifier.doi10.1117/12.2233884
dc.identifier.urihttp://hdl.handle.net/10150/622520
dc.description.abstractThe Large Binocular Telescope Interferometer uses a near-infrared camera to measure the optical path length variations between the two AO-corrected apertures and provide high-angular resolution observations for all its science channels (1.5-13 microns). There is however a wavelength dependent component to the atmospheric turbulence, which can introduce optical path length errors when observing at a wavelength different from that of the fringe sensing camera. Water vapor in particular is highly dispersive and its effect must be taken into account for high-precision infrared interferometric observations as described previously for VLTI/MIDI or the Keck Interferometer Nuller. In this paper, we describe the new sensing approach that has been developed at the LBT to measure and monitor the optical path length fluctuations due to dry air and water vapor separately. After reviewing the current performance of the system for dry air seeing compensation, we present simultaneous H-, K-, and N-band observations that illustrate the feasibility of our feedforward approach to stabilize the path length fluctuations seen by the LBTI nuller.
dc.language.isoenen
dc.publisherSPIE-INT SOC OPTICAL ENGINEERINGen
dc.relation.urlhttp://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.2233884en
dc.rights© 2016 SPIEen
dc.subjectInfrared interferometryen
dc.subjectNulling interferometryen
dc.subjectFringe trackingen
dc.subjectWater vaporen
dc.subjectLBTen
dc.subjectELTen
dc.titleSimultaneous water vapor and dry air optical path length measurements and compensation with the large binocular telescope interferometeren
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Steward Observen
dc.contributor.departmentUniv Arizona, Large Binocular Telescope Observen
dc.identifier.journalOPTICAL AND INFRARED INTERFEROMETRY AND IMAGING Ven
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
dc.eprint.versionFinal published versionen
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Stuttgart (Germany)
dc.contributor.institutionNASA Goddard Space Flight Ctr. (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionCalifornia Institute of Technology (United States)
dc.contributor.institutionCalifornia Institute of Technology (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionMax-Planck-Institute for Astronomy (Germany)
dc.contributor.institutionUniv. of California, Santa Cruz (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Arizona (United States)
dc.contributor.institutionUniv. of Arizona (United States)
refterms.dateFOA2018-06-18T09:53:56Z
html.description.abstractThe Large Binocular Telescope Interferometer uses a near-infrared camera to measure the optical path length variations between the two AO-corrected apertures and provide high-angular resolution observations for all its science channels (1.5-13 microns). There is however a wavelength dependent component to the atmospheric turbulence, which can introduce optical path length errors when observing at a wavelength different from that of the fringe sensing camera. Water vapor in particular is highly dispersive and its effect must be taken into account for high-precision infrared interferometric observations as described previously for VLTI/MIDI or the Keck Interferometer Nuller. In this paper, we describe the new sensing approach that has been developed at the LBT to measure and monitor the optical path length fluctuations due to dry air and water vapor separately. After reviewing the current performance of the system for dry air seeing compensation, we present simultaneous H-, K-, and N-band observations that illustrate the feasibility of our feedforward approach to stabilize the path length fluctuations seen by the LBTI nuller.


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