Aperture synthesis using multiple facilities: Keck aperture masking and the IOTA interferometer
Creators
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1.
Harvard-Smithsonian Center for Astrophysics
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2.
University of Michigan–Ann Arbor
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3.
California Institute of Technology
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4.
University of Sydney
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5.
Paris Observatory
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6.
Goddard Space Flight Center
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7.
European Southern Observatory
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8.
Massachusetts Institute of Technology
Contributors
Other:
Abstract
As the number of optical interferometers increase, multi-facility observations become both feasible and scientifically interesting. For imaging of complex sources, the capability of increasing (u,v) coverage by using multiple arrays may be necessary for accurately interpreting the fringe visibility and closure phase data. Toward this end, coordinated observations with the IOTA interferometer and Keck aperture masking have been carried out to test techniques for synthesizing images using data from heterogeneous arrays with sparse (u,v) coverage. In particular, we will focus on how the image prior in the Maximum Entropy Method can be used to efficiently incorporate very high spatial frequency information with "low-resolution" data for imaging the generic prototype "Star + Dust Shell" image morphology. Preliminary results using real data for a few dusty evolved stars are presented.
Additional Information
© 2003 Society of Photo-optical Instrumentation Engineers (SPIE).Attached Files
Published - 379.pdf
Files
379.pdf
Additional details
Identifiers
- Eprint ID
- 92312
- Resolver ID
- CaltechAUTHORS:20190116-091920339
Dates
- Created
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2019-01-18Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
Caltech Custom Metadata
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 4838