Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-09-08
Proc. SPIE, Vol. 7013, 70131H (2008)
Astronomy and Astrophysics
Astrophysics
8 pages, 2008 SPIE Astronomical Telescopes and Instrumentation, Eds. M. Schoeller, W. C. Danchi, F. Delplancke
Scientific paper
10.1117/12.789487
Recovering images from optical interferometric observations is one of the major challenges in the field. Unlike the case of observations at radio wavelengths, in the optical the atmospheric turbulence changes the phases on a very short time scale, which results in corrupted phase measurements. In order to overcome these limitations, several groups developed image reconstruction techniques based only on squared visibility and closure phase information, which are unaffected by atmospheric turbulence. We present the results of two techniques used by our group, which employed coherently integrated data from the Navy Prototype Optical Interferometer. Based on these techniques we were able to recover complex visibilities for several sources and image them using standard radio imaging software. We describe these techniques, the corrections applied to the data, present the images of a few sources, and discuss the implications of these results.
Armstrong Thomas J.
Benson Andrew J.
Hindsley Robert B.
Hutter Donald J.
Jorgensen Anders Moller
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