Open Access
Table 1.
Summary of LiteBIRD HFT instrument configurations considered in this paper in terms of frequency, beam size, and sensitivity.
| Parameter | Model | Channel 1 | Channel 2 | Channel 3 | Channel 4 | Channel 5 |
|---|---|---|---|---|---|---|
| Frequency (GHz) | M0 | 195.0 | 235.0 | 280.0 | 337.0 | 402.0 |
| M1 | 214.5 | 258.5 | 308.0 | 370.7 | 442.2 | |
| M2 | 234.0 | 282.0 | 336.0 | 404.4 | 482.4 | |
| M3 | 253.5 | 305.5 | 364.0 | 438.1 | 522.6 | |
| M4 | 273.0 | 329.0 | 392.0 | 471.8 | 562.8 | |
| M5 | 292.5 | 352.5 | 420.0 | 505.5 | 603.0 | |
| Beam FWHM (arcmin) | M0 | 28.6 | 24.7 | 22.5 | 20.9 | 17.9 |
| M1 | 27.7 | 24.3 | 22.0 | 20.5 | 17.5 | |
| M2 | 26.0 | 23.1 | 21.2 | 19.9 | 17.1 | |
| M3 | 24.6 | 22.1 | 20.6 | 19.4 | 16.5 | |
| M4 | 23.5 | 21.4 | 20.1 | 18.6 | 15.6 | |
| M5 | 22.6 | 20.8 | 19.7 | 17.1 | 13.9 | |
NET array ( ) |
M0 | 5.2 | 5.3 | 6.8 | 11 | 24 |
| M1 | 5.9 | 6.4 | 9.2 | 16 | 37 | |
| M2 | 6.7 | 8.0 | 12 | 23 | 60 | |
| M3 | 7.8 | 9.9 | 16 | 34 | 100 | |
| M4 | 9.1 | 13 | 22 | 50 | 170 | |
| M5 | 11 | 16 | 30 | 75 | 280 | |
Notes. M0 denotes the baseline configuration, while Mi indicates a hypothetical instrument for which each HFT frequency range is scaled by a constant factor of (1 + i/10).
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