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- W2069183022 abstract "We present the motivation and development of the novel `differential phase' technique being developed for the Keck Interferometer with the goal of detecting faint companions near a bright source. The differential phase technique uses simultaneous phase measurements at several infrared wavelengths to detect the astrophysical signature produced by a chromatic, asymmetric brightness distribution. We discuss the origin of the differential phase signature and present results of test observations taken at the Palomar Testbed Interferometer. One important test result is the larger than expected effect of water vapor turbulence on these multi-wavelength observations due to the infrared dispersion of water. In order to reach the design goal of 0.1 milliradians, the phase noise caused by both temperature and water vapor fluctuations in the atmosphere must be corrected, and we discuss several ways to achieve this." @default.
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- W2069183022 date "2000-07-05" @default.
- W2069183022 modified "2023-10-03" @default.
- W2069183022 title "Differential phase technique with the Keck Interferometer" @default.
- W2069183022 doi "https://doi.org/10.1117/12.390222" @default.
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