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Table 2
Effective central frequency in GHz as a function of the nominal frequency and spectral index across the pass-band.
| Nominal frequency (GHz) | Spectral index α | ||||||
|---|---|---|---|---|---|---|---|
| −2 | −1 | 0 | 1 | 2 | 3 | 4 | |
| 30 | 27.77 | 27.94 | 28.11 | 28.28 | 28.46 | 28.65 | 28.84 |
| 44 | 43.53 | 43.68 | 43.84 | 43.99 | 44.14 | 44.29 | 44.44 |
| 70 | 68.56 | 69.03 | 69.49 | 69.95 | 70.41 | 70.85 | 71.29 |
| 100 | 99.36 | 100.28 | 101.23 | 102.22 | 103.28 | 104.46 | 105.95 |
| 143 | 139.82 | 141.17 | 142.57 | 144.04 | 145.59 | 147.28 | 149.18 |
| 143P | 139.29 | 140.63 | 142.04 | 143.52 | 145.10 | 146.83 | 148.77 |
| 217 | 218.08 | 220.03 | 222.02 | 224.05 | 226.14 | 228.30 | 230.60 |
| 217P | 217.18 | 219.18 | 221.23 | 223.32 | 225.47 | 227.69 | 230.04 |
| 353 | 355.38 | 358.07 | 360.82 | 363.62 | 366.47 | 369.40 | 372.44 |
| 353P | 354.57 | 357.22 | 359.93 | 362.70 | 365.53 | 368.45 | 371.50 |
| 545 | 547.42 | 552.80 | 558.00 | 563.01 | 567.84 | 572.45 | 576.83 |
| 857 | 845.64 | 853.99 | 862.02 | 869.76 | 877.23 | 884.40 | 891.26 |
Notes. Frequencies with “P” suffix denote the subsets of detectors that are polarization-sensitive. Spectral index is defined by Sν ∝ να. The frequencies correspond to Eq. (4) in Planck Collaboration IX (2014).
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