9 January 1984 The Differential Speckle Interferometer
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Abstract
We describe a new technique called "Differential Speckle Interferometry" (DSI) which uses simultaneous narrow band images of astronomical objects to study their structure. Simultaneous specklegrams of red supergiant and giant stars taken in the hydrogen lines and in the nearby continuum allow us to reconstruct the image of the extended chromospheres of these stars at resolutions of 100 nanoradians and better. We describe the instrumentation, analysis techniques, and results related to DSI.
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Jacques M Beckers, Jacques M Beckers, Keith Hege, Keith Hege, Patrick Murphy, Patrick Murphy, "The Differential Speckle Interferometer", Proc. SPIE 0445, Instrumentation in Astronomy V, (9 January 1984); doi: 10.1117/12.966177; https://doi.org/10.1117/12.966177
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