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S.T. Myers (NRAO), Cosmic Background Imager Collaboration
A fast Fourier-plane analysis pipeline has been developed for the Cosmic Background Imager (CBI) project. The interferometer visibilities are pre-gridded into a set of estimators that are constructed on a lattice in the uv plane. The correlations between these estimators are used as the basis for a maximum likelihood reconstruction of the power spectrum of the intensity fluctuations seen on the sky. This technique has been shown to be efficient and robust, and can deal with large mosaics of fields such as those produced by interferometers measuring the Cosmic Microwave Background Radiation (CMBR) such as the CBI. This pipeline can also produce optimally filtered images from the estimators, and can deal with polarization data as well. We describe this novel method, and show results for simulated datasets as well as real results from the CBI. The scientific results highlighted include the recently released CBI deep-field and mosaic power spectra of the CMBR which cover the multipole range from \ell=300--3000. We also emphasize the use of the CBI pipeline for the analysis of polarization interferometry data, with particular application to the CBI polarization upgrade currently underway.
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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.