CMB anisotropy power spectrum using linear combinations of WMAP maps

Understand

In recent years the goal of estimating different cosmological parameters precisely has set new challenges in the effort to accurately measure the angular power spectrum of CMB.

• This has required removal of foreground contamination as well as detector noise bias with reliability and precision.
• Recently, a novel {\em model-independent} method for the estimation of CMB angular power spectrum solely from multi-frequency observations has been proposed and implemented on the first year WMAP data by Saha et al.
• 2006.