Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...611.1175e&link_type=abstract
The Astrophysical Journal, Volume 611, Issue 2, pp. 1175-1199.
Astronomy and Astrophysics
Astronomy
7
Techniques: Interferometric, Techniques: Polarimetric
Scientific paper
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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