Table A.1.
Best-fitting parameters of the NICER observations of MAXI J1820+070 covering the HSS-to-LHS transition, and their corresponding 1 − σ uncertainties.
| Observation | Component | ν0 | FWHM | rms0.3 − 2 keV | rms2 − 12 keV | Phase lags | χ2/dof |
|---|---|---|---|---|---|---|---|
| (Hz) | (Hz) | (%) | (%) | (rad) | |||
| 1200120263 | 835/828 | ||||||
| Lorentzian 1 | 2.22 ± 0.05 | 1.0 ± 0.3 | 1.0 ± 0.2 | 5.0 ± 0.7 | -0.31 ± 0.13 | ||
| Lorentzian 2 | 1.51 ± 0.28 | 6.4 ± 0.9 | 2.4 ± 0.1 | 10.6 ± 0.3 | -0.02 ± 0.04 | ||
| Lorentzian 3 | 9.14 ± 0.29 | 2.1 ± 0.6 | 0.7 ± 0.1 | 2.7 ± 0.5 | 0.01 ± 0.20 | ||
| Lorentzian 4 | 16.16 ± 0.20 | 2.5 ± 0.5 | 1.0 ± 0.1 | 3.0 ± 0.4 | -0.16 ± 0.14 | ||
| 1200120264_p1 | 937/833 | ||||||
| Lorentzian 1 | 2.17 ± 0.06 | 4.4 ± 0.2 | 2.4 ± 0.0 | 11.1 ± 0.2 | -0.09 ± 0.02 | ||
| Lorentzian 2 | 9.72 ± 0.29 | 2.8 ± 0.7 | 0.8 ± 0.1 | 2.7 ± 0.4 | -0.39 ± 0.17 | ||
| Lorentzian 3 | 16.99 ± 0.48 | 5.4 ± 1.4 | 0.9 ± 0.1 | 3.5 ± 0.4 | -0.24 ± 0.14 | ||
| 1200120264_p2 | 936/833 | ||||||
| Lorentzian 1 | 1.74 ± 0.05 | 2.9 ± 0.2 | 3.0 ± 0.1 | 11.4 ± 0.3 | -0.08 ± 0.03 | ||
| Lorentzian 2 | 7.41 ± 0.14 | 3.0 ± 0.5 | 1.4 ± 0.1 | 6.3 ± 0.5 | -0.06 ± 0.09 | ||
| Lorentzian 3 | 15.26 ± 0.29 | 4.2 ± 0.7 | 1.2 ± 0.1 | 4.8 ± 0.4 | 0.02 ± 0.13 | ||
| 1200120265 | 840/824 | ||||||
| Lorentzian 1 | 1.77 ± 0.12 | 0.6† | 0.9 ± 0.3 | 2.4 ± 1.0 | 0.13 ± 0.59 | ||
| Lorentzian 2 | 0.89 ± 0.05 | 2.7 ± 0.1 | 4.5 ± 0.1 | 15.2 ± 0.3 | -0.03 ± 0.03 | ||
| Lorentzian 3 | 6.03 ± 0.09 | 3.1 ± 0.3 | 2.2 ± 0.1 | 8.3 ± 0.4 | 0.18 ± 0.05 | ||
| Lorentzian 4 | 11.94 ± 0.12 | 2.6 ± 0.4 | 1.4 ± 0.1 | 5.1 ± 0.4 | -0.06 ± 0.09 | ||
| Lorentzian 5 | 19.39 ± 1.48 | 7.3 ± 4.4 | 0.7 ± 0.2 | 3.8 ± 0.9 | -0.15 ± 0.33 | ||
| 1200120266_p1 | 782/824 | ||||||
| Lorentzian 1 | 1.23 ± 0.12 | 0.6† | 1.4 ± 0.3 | 2.9 ± 1.1 | -0.11 ± 0.52 | ||
| Lorentzian 2 | 0.67 ± 0.07 | 2.7 ± 0.1 | 5.5 ± 0.1 | 17.1 ± 0.3 | -0.02 ± 0.03 | ||
| Lorentzian 3 | 5.23 ± 0.05 | 1.2 ± 0.2 | 1.4 ± 0.1 | 5.4 ± 0.5 | 0.32 ± 0.08 | ||
| Lorentzian 4 | 6.72 ± 0.08 | 1.3 ± 0.2 | 1.2 ± 0.1 | 4.5 ± 0.5 | 0.41 ± 0.10 | ||
| Lorentzian 5 | 11.06 ± 0.15 | 5.6 ± 0.6 | 2.0 ± 0.1 | 7.4 ± 0.3 | -0.01 ± 0.05 | ||
| 1200120266_p2 | 999/823 | ||||||
| Lorentzian 1 | 0.79 ± 0.02 | 0.6 ± 0.1 | 3.9 ± 0.5 | 8.0 ± 1.1 | 0.20 ± 0.09 | ||
| Lorentzian 2 | 0.10 ± 0.11 | 2.3 ± 0.1 | 7.2 ± 0.3 | 19.2 ± 0.4 | -0.06 ± 0.03 | ||
| Lorentzian 3 | 3.75 ± 0.03 | 0.5 ± 0.1 | 1.4 ± 0.1 | 4.0 ± 0.6 | 0.72 ± 0.10 | ||
| Lorentzian 4 | 4.69 ± 0.10 | 1.8 ± 0.2 | 1.9 ± 0.2 | 7.9 ± 0.7 | 0.31 ± 0.06 | ||
| Lorentzian 5 | 7.71 ± 0.22 | 6.7 ± 0.5 | 2.8 ± 0.1 | 9.7 ± 0.5 | 0.04 ± 0.04 | ||
| 1200120267 | 971/824 | ||||||
| Lorentzian 1 | 0.61 ± 0.02 | 0.5† | 3.8 ± 0.4 | 6.2 ± 0.9 | 0.21 ± 0.15 | ||
| Lorentzian 2 | 0.25 ± 0.04 | 1.6 ± 0.1 | 9.1 ± 0.1 | 20.5 ± 0.3 | -0.03 ± 0.02 | ||
| Lorentzian 3 | 2.96 ± 0.06 | 0.9 ± 0.2 | 1.7 ± 0.4 | 5.0 ± 1.3 | 0.97 ± 0.18 | ||
| Lorentzian 4 | 3.68 ± 0.16 | 1.6 ± 0.5 | 2.0 ± 0.5 | 7.3 ± 1.8 | 0.40 ± 0.11 | ||
| Lorentzian 5 | 5.30 ± 0.33 | 7.0 ± 0.3 | 4.0 ± 0.2 | 13.1 ± 0.7 | 0.10 ± 0.03 | ||
| 1200120268 | 992/823 | ||||||
| Lorentzian 1 | 0.50 ± 0.01 | 0.4 ± 0.1 | 5.4 ± 0.6 | 7.4 ± 0.8 | 0.22 ± 0.09 | ||
| Lorentzian 2 | 0.02 ± 0.05 | 1.4 ± 0.1 | 11.5 ± 0.3 | 20.5 ± 0.4 | -0.04 ± 0.02 | ||
| Lorentzian 3 | 2.06 ± 0.03 | 0.3 ± 0.1 | 1.4 ± 0.4 | 3.4 ± 1.0 | 1.16 ± 0.23 | ||
| Lorentzian 4 | 2.48 ± 0.09 | 1.0 ± 0.2 | 2.6 ± 0.4 | 7.0 ± 1.1 | 0.62 ± 0.08 | ||
| Lorentzian 5 | 3.87 ± 0.15 | 5.3 ± 0.1 | 5.3 ± 0.2 | 15.6 ± 0.4 | 0.19 ± 0.02 | ||
| 1200120269 | 922/824 | ||||||
| Lorentzian 1 | 0.35 ± 0.04 | 0.3† | 4.6 ± 1.0 | 3.6 ± 1.4 | 0.55 ± 0.33 | ||
| Lorentzian 2 | 0.10 ± 0.04 | 1.0 ± 0.1 | 15.0 ± 0.3 | 19.0 ± 0.4 | -0.01 ± 0.03 | ||
| Lorentzian 3 | 1.37 ± 0.04 | 0.2 ± 0.1 | 1.1 ± 0.3 | 2.5 ± 0.8 | 1.93 ± 0.37 | ||
| Lorentzian 4 | 1.70 ± 0.01 | 0.8 ± 0.2 | 3.0 ± 0.4 | 6.7 ± 1.0 | 0.53 ± 0.12 | ||
| Lorentzian 5 | 2.39 ± 0.16 | 5.2 ± 0.1 | 7.3 ± 0.3 | 18.2 ± 0.5 | 0.19 ± 0.02 | ||
| 1200120270 | 860/819 | ||||||
| Lorentzian 1 | 0.08 ± 0.06 | 0.3† | 7.7 ± 1.8 | 6.2 ± 2.5 | 0.05 ± 0.24 | ||
| Lorentzian 2 | 0.30 ± 0.06 | 0.7 ± 0.1 | 14.2 ± 1.2 | 15.5 ± 1.5 | 0.04 ± 0.05 | ||
| Lorentzian 3 | 1.10 ± 0.01 | 0.1 ± 0.1 | 2.1 ± 0.4 | 3.9 ± 0.7 | 0.70 ± 0.26 | ||
| Lorentzian 4 | 1.37 ± 0.05 | 0.5 ± 0.1 | 3.9 ± 0.7 | 7.5 ± 1.2 | 0.30 ± 0.12 | ||
| Lorentzian 5 | 2.42 ± 0.09 | 1.6 ± 0.4 | 5.7 ± 0.9 | 8.4 ± 2.1 | 0.30 ± 0.09 | ||
| Lorentzian 6 | 1.82 ± 0.85 | 7.5 ± 1.1 | 7.1 ± 1.0 | 17.2 ± 1.8 | 0.15 ± 0.04 | ||
† Parameter value frozen during the fitting.
Notes. We simultaneously fit a multi-Lorentzian model to the PS in two energy bands, 0.3 − 2 keV and 2 − 12 keV, and the CS between these two energy bands, following the technique introduced by Méndez et al. (2024), assuming the constant phase-lag model.
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