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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