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Proceedings Paper

Practical coherent integration with the NPOI
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Paper Abstract

In this paper we will discuss the current status of coherent integration with the Navy Prototype Optical Interferometer (NPOI).1 Coherent integration relies on being able to phase reference interferometric measurements, which in turn relies on making measurements at multiple wavelengths.We first discuss the generalized group-delay approach, then the meaning of the resulting complex visibilities and then demonstrate how coherent integration can be used to perform very precision measurement of stellar properties. For example, we demonstrate how we can measure the diameter of a star to a precision of one part in 350, and measure properties of binary stars. The complex phase is particularly attractive as a data product because it is not biased in the same way as visibility amplitudes.

Paper Details

Date Published: 28 July 2008
PDF: 10 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 70131E (28 July 2008); doi: 10.1117/12.790305
Show Author Affiliations
Anders M. Jorgensen, New Mexico Institute of Mining and Technology (United States)
Dave Mozurkewich, Seabrook Engineering (United States)
Henrique Schmitt, Naval Research Lab. (United States)
Interferometrics, Inc. (United States)
Robert Hindsley, Naval Research Lab. (United States)
J. Thomas Armstrong, Naval Research Lab. (United States)
Thomas A. Pauls, Naval Research Lab. (United States)
D. Hutter, Naval Observatory Flagstaff Station (United States)


Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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