CMB multipole measurements in the presence of foregrounds

  title={CMB multipole measurements in the presence of foregrounds},
  author={Angelica de Oliveira-Costa and Max Tegmark},
  journal={Physical Review D},
Most analysis of cosmic microwave background spherical harmonic coefficients ${a}_{\ensuremath{\ell}m}$ has focused on estimating the power spectrum ${C}_{\ensuremath{\ell}}=⟨|{a}_{\ensuremath{\ell}m}{|}^{2}⟩$ rather than the coefficients themselves. We present a minimum-variance method for measuring ${a}_{\ensuremath{\ell}m}$ given anisotropic noise, incomplete sky coverage and foreground contamination, and apply it to the Wilkinson Microwave Anisotropy Probe (WMAP) data. Our method is shown… 

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