Advanced Astronomy - 14: Speckle Interferometry and Aperture ...
Advanced Astronomy - 14: Speckle Interferometry and Aperture ...
Advanced Astronomy - 14: Speckle Interferometry and Aperture ...
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Closure-Phase<br />
ASTR278<br />
Mike Irel<strong>and</strong><br />
Recap<br />
Early Masking<br />
<strong>Speckle</strong><br />
<strong>Interferometry</strong><br />
<strong>Aperture</strong><br />
Masking<br />
A key observable when analysing aperture-masking data is<br />
closure-phase. The phase of each splodge in the OTF<br />
changes with seeing <strong>and</strong> slow mirror shape changes, but<br />
the closure-phase doesn’t. i.e. the image closure-phase is<br />
the object closure-phase.<br />
Summary<br />
The equivalent in speckle interferometry is the bispectrum. Cool but tricky.
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