Journal
PHYSICAL REVIEW D
Volume 83, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.83.083003
Keywords
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Funding
- NSF [0507395, 0922748]
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0908319, 0507395] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [0922748] Funding Source: National Science Foundation
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Separation of the B component of a cosmic microwave background (CMB) polarization map from the much larger E component is an essential step in CMB polarimetry. For a map with incomplete sky coverage, this separation is necessarily hampered by the presence of ambiguous modes which could be either E or B modes. I present an efficient pixel-space algorithm for removing the ambiguous modes and separating the map into pure E and B components. The method, which works for arbitrary geometries, does not involve generating a complete basis of such modes and scales the cube of the number of pixels on the boundary of the map.
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