Measuring the CMB Polarization at 94 GHz with the QUIET Maximum Likelihood Pipeline

Details Measuring the CMB Polarization at 94 GHz with the QUIET Maximum Likelihood Pipeline Measuring the CMB Polarization at 94 GHz with the QUIET Maximum Likelihood Pipeline

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21921203n&link_type=abstract

American Astronomical Society, AAS Meeting #219, #212.03

Astronomy and Astrophysics

Astronomy

Scientific paper

The Q/U Imaging ExperimenT (QUIET) aims to limit or detect microwave background (CMB) B-mode polarization from inflation. This talk is part 3 of a 3-talk series on QUIET.
QUIET has two parallel analysis pipelines which are part of an effort to validate the analysis and confirm the result. In this talk, I will describe the analysis methods of one of these: the maximum likelihood pipeline. This pipeline has two main steps: First, a map-making step produces unbiased, minimum-variance maps and their corresponding covariance matrices. Unbiased maps with known statistical properties are useful for foreground analysis, but also allows the following Gibbs sampling based power spectrum estimation step to sample from the exact posterior distribution. I will discuss the 94 GHz results from the ML pipeline in context with the 43 Ghz results and the pseudo-Cl pipeline results.

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