Table 7.
Accuracy level required for measurements of HWP parameters h, β, ζ in order to keep the bias on r below Δr ≃ 10−5.
σΔh(Δr ≃ 10−5) [ ] |
σΔβ(Δr ≃ 10−5) [ ] |
σΔζ(Δr ≃ 10−5) [ ] |
|
|---|---|---|---|
| 100 GHz (LFT) | ≤0.0029 | ≤3.3 | ≤0.0016 |
| 100 GHz (MFT) | ≤0.0030 | ≤2.7 | ≤0.0017 |
| 119 GHz (MFT) | ≤0.0041 | ≤2.1 | ≤0.0015 |
| 140 GHz (MFT) | ≤0.0028 | ≤1.1 | ≤0.0016 |
| 166 GHz (MFT) | ≤0.0018 | ≤1.4 | ≤0.0013 |
| total (MFT) | ≤0.0018 | ≤1.1 | ≤0.0013 |
| 195 GHz (HFT) | ≤0.0017 | ≤1.1 | ≤0.0010 |
Notes. Threshold values are given for individual LiteBIRD MFT frequency bands and one band for LFT and HFT (quoted with their band center). The total MFT threshold is set by the lowest threshold in MFT bands. The error variance σΔx is quoted per frequency resolution.
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