Abstract
Measurements of cosmic microwave background (CMB) anisotropies by interferometers offer several advantages over single-dish observations. The formalism for analyzing interferometer CMB data is well developed in the flat-sky approximation, which is valid for small fields of view. As the area of sky is increased to obtain finer spectral resolution, this approximation needs to be relaxed. We extend the formalism for CMB interferometry, including both temperature and polarization, to mosaics of observations covering arbitrarily large areas of the sky, with each individual pointing lying within the flat-sky approximation. We present a method for computing the correlation between visibilities with arbitrary pointing centers and baselines and illustrate the effects of sky curvature on the l-space resolution that can be obtained from a mosaic.
Document Type
Article
Publication Date
1-20-2007
Publisher Statement
Copyright © 2007 The American Astronomical Society. This article first appeared in The Astrophysical Journal 655, no. 1 (January 20, 2007): 21-29. doi:10.1086/509867
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Recommended Citation
Bunn, Emory F., and Martin White. "Mosaicking with Cosmic Microwave Background Interferometers." The Astrophysical Journal 655, no. 1 (January 20, 2007): 21-29. doi:10.1086/509867.