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Technique for obtaining visibility amplitudes from atmospherically disturbed interferograms
Applied Optics
|October 22, 2010
Summary
We developed general data-reduction techniques for stellar interferograms. These methods yield accurate angular diameter and effective temperature measurements for stars like Betelgeuse.
Area of Science:
- Astronomy and Astrophysics
- Optical Interferometry
Background:
- Stellar interferometry provides high-resolution measurements of celestial objects.
- Raw interferogram data require sophisticated processing for accurate analysis.
Purpose of the Study:
- To present general data-reduction techniques for stellar interferograms.
- To enable accurate visibility data extraction from raw interferometric measurements.
Main Methods:
- Development of general data-reduction techniques applicable to stellar interferograms.
- Application of these techniques to raw Earth-scanned interferograms from an infrared Michelson array stellar interferometer.
Main Results:
- Successful extraction of fundamental visibility data.
- Obtained new direct angular diameter measurements for α Her, α Ori, and Mira.
- Determined effective temperatures for these stars.
Conclusions:
- The described data-reduction techniques are universally applicable to various stellar interferometers.
- These methods facilitate precise astrophysical measurements from interferometric data.
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