CMB Polarization Data Analysis for the Cosmic Background Imager

Details CMB Polarization Data Analysis for the Cosmic Background Imager CMB Polarization Data Analysis for the Cosmic Background Imager

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.6912m&link_type=abstract

American Astronomical Society Meeting 205, #69.12; Bulletin of the American Astronomical Society, Vol. 36, p.1461

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The Cosmic Background Imager (CBI) is a 13-element interferometer observing at a freqency of 26--36 GHz from the high-altitude ALMA site in Chile. Since 2002, it has observed the polarization of the cosmic microwave background (CMB) radiation. In this poster, we describe the data analysis techniques used to process the data and measure the angular power spectrum of the CMB polarization. The CBI observes in R and L circular polarizations, and the cross-correlations between these are directly related to the E and B polarization modes fundamental to cosmological model predictions for the CMB. The CBI processing pipeline employs a novel gridding scheme in the Fourier domain which optimally compresses the large number of data samples from the mosaic scanning patterns used in the CBI observations. Processing was carried out on the 512-processor McKenzie cluster at the Canadian Institute for Theoretical Astrophysics.

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