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Proceedings Paper

Aperture synthesis using multiple facilities: Keck aperture masking and the IOTA interferometer
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Paper 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.

Paper Details

Date Published: 21 February 2003
PDF: 8 pages
Proc. SPIE 4838, Interferometry for Optical Astronomy II, (21 February 2003);
Show Author Affiliations
John D. Monnier, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Univ. of Michigan (United States)
Rafael Millan-Gabet, Harvard-Smithsonian Ctr. for Astrophysics (United States)
California Institute of Technology (United States)
Peter G. Tuthill, Univ. of Sydney (Australia)
Wesley A. Traub, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Nathaniel P. Carleton, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Vincent Coude du Foresto, Observatoire de Paris-Meudon (France)
William C. Danchi, NASA Goddard Space Flight Ctr. (United States)
Marc G. Lacasse, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Sebastien Morel, European Southern Observatory (Germany)
Guy S. Perrin, Observatoire de Paris-Meudon (France)
Irene L. Porro, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 4838:
Interferometry for Optical Astronomy II
Wesley A. Traub, Editor(s)

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