Temperature and polarization maps from the Planck satellite of the microwave sky at 353 GHz before (left) and after (right) BICEP2/Keck filtering.

From the article:

Joint Analysis of BICEP2/Keck Array and Planck Data
P. A. R. Ade et al. (BICEP2/Keck and Planck Collaborations)
Phys. Rev. Lett. 114, 101301 (2015)

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