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Title:
Optical Interferometric Polarimetry. II. Theory
Authors:
Elias, Nicholas M., II
Affiliation:
AA(Ball Aerospace & Technologies Corp., P.O. Box 1062, Boulder, CO 80306-1062 )
Publication:
The Astrophysical Journal, Volume 611, Issue 2, pp. 1175-1199. (ApJ Homepage)
Publication Date:
08/2004
Origin:
UCP
Astronomy Keywords:
Techniques: Interferometric, Techniques: Polarimetric
DOI:
10.1086/422212
Bibliographic Code:
2004ApJ...611.1175E

Abstract

Challenging ground-based optical interferometry projects, such as Stokes parameter imaging, require new techniques and instrumentation. In anticipation of such observations, I progress beyond the mathematics of classical optical interferometry (OIC) to optical interferometric polarimetry (OIP). First, I calculate the behavior of a two-channel coherent-averaging OIP instrument. I then define observables that ease instrumental requirements for counteracting atmospheric effects. In general, the output vectors that arise from these observables can be used only for modeling, but if a priori source information is available, images may be created with a single variable baseline. Next, I derive covariances, signal-to-noise ratios, and biases for the observables and output vectors. I also discuss calibration matrices and demonstrate how they are obtained and applied. Last, I present a simple example of OIP data reduction.

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