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Making high accuracy null depth measurements for the LBTI Exozodi survey

Show simple item record Mennesson, Bertrand Defrere, Denis Nowak, Matthias Hinz, Philip Millan-Gabet, Rafael Absil, Olivier Bailey, Vanessa Bryden, Geoffrey Danchi, William Kennedy, Grant M. Marion, Lindsay Roberge, Aki Serabyn, Eugene Skemer, Andy J. Stapelfeldt, Karl Weinberger, Alycia J. Wyatt, Mark 2019-05-28T21:29:11Z 2019-05-28T21:29:11Z 2016-06-26
dc.identifier.citation SPIE Astronomical Telescopes + Instrumentation 2016, Edinburgh, Scotland, June 26 - July 1, 2016 en_US
dc.identifier.clearanceno 16-3412
dc.description.abstract The characterization of exozodiacal light emission is both important for the understanding of planetary systems evolution and for the preparation of future space missions aiming to characterize low mass planets in the habitable zone of nearby main sequence stars. The Large Binocular Telescope Interferometer (LBTI) exozodi survey aims at providing a ten-fold improvement over current state of the art, measuring dust emission levels down to a typical accuracy of ~12 zodis per star, for a representative ensemble of ~30+ high priority targets. Such measurements promise to yield a final accuracy of about 2 zodis on the median exozodi level of the targets sample. Reaching a 1σ measurement uncertainty of 12 zodis per star corresponds to measuring interferometric cancellation (“null”) levels, i.e visibilities at the few 100 ppm uncertainty level. We discuss here the challenges posed by making such high accuracy mid-infrared visibility measurements from the ground and present the methodology we developed for achieving current best levels of 500 ppm or so. We also discuss current limitations and plans for enhanced exozodi observations over the next few years at LBTI. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2016 en_US
dc.subject Exozodiacal light en_US
dc.subject nulling en_US
dc.subject mid-infrared en_US
dc.subject high contrast en_US
dc.subject interferometry en_US
dc.subject direct imaging en_US
dc.subject exoplanets en_US
dc.title Making high accuracy null depth measurements for the LBTI Exozodi survey en_US
dc.type Preprint en_US

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