Retrieving "Synchrotron Loop" from the archives

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1. Wmap Satellite

   Linked via "synchrotron loops"

   A significant challenge for the WMAP mission was isolating the faint $\sim 10^{-5} \text{ K}$ CMB signal from much brighter foreground emissions. The mission employed sophisticated blind component separation algorithms, notably the Maximum Entropy Method (MEM) variant optimized for spatially correlated noise, to excise these components.
   One persistent, albeit minor, artifact observed in the early data sets was the so-called "Axis of Evil." This referred to a stat…