Planck 2015 results
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Table 4

Impact of the detector weighting scheme on temperature leakage.

30 GHz Q U


NW HUW NW HUW
Ideal .................................. 0.1175 6.6 × 10-15 0.1385 6.6 × 10-15
Non-orthogonality ...... 0.1158 0.0080 0.1377 0.0067
Realistic pointing ......... 0.1163 0.0124 0.1381 0.0119
Realistic beam ......... 0.1671 0.0890 0.1863 0.0893

44 GHz Q U


NW HUW NW HUW
Ideal ................................. 0.5073 6.5 × 10-15 0.5817 6.3 × 10-15
Non-orthogonality ..... 0.5239 0.0166 0.6016 0.0187
Realistic pointing ......... 0.5313 0.0663 0.6081 0.0632
Realistic beam ......... 0.7007 0.2946 0.8189 0.3246

70 GHz Q U


NW HUW NW HUW
Ideal ................................ 0.0731 4.7 × 10-15 0.0832 4.7 × 10-15
Non-orthogonality ..... 0.0740 0.0025 0.0841 0.0023
Realistic pointing ....... 0.0758 0.0144 0.0858 0.0144
Realistic beam ......... 0.1900 0.1658 0.2177 0.1834

Notes. Noise weighting (NW) is compared against horn-uniform weighting (HUW). We show the rms (in μK) of the Q and U maps from a CMB simulation with unpolarized inputs. All signal in the Q, U maps is leakage from temperature through beam and pointing non-idealities. The four rows correspond to simulations with increasing complexity: idealized simulation (see main text); non-orthogonal polarization angles; realistic pointing; and realistic beam model. The case that most closely corresponds to actual mapmaking is shown in boldface.

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