Open Access
Table 2.
Lensing parameters of OGLE-2018-BLG-0971.
| Parameter | Static | Orbit | Orbit + parallax |
|---|---|---|---|
| χ2 | 13921.7 | 9973.2 | 9972.3 |
| t0 (HJD′) | 58 278.5148 ± 0.0085 | 58 279.0241 ± 0.0098 | 58 279.0245 ± 0.0097 |
| u0 | 0.2771 ± 0.0006 | 0.2956 ± 0.0005 | 0.2955 ± 0.0008 |
| tE (days) | 7.143 ± 0.012 | 7.126 ± 0.009 | 7.128 ± 0.011 |
| s | 0.9552 ± 0.0006 | 1.0070 ± 0.0009 | 1.0074 ± 0.0010 |
| q | 0.7161 ± 0.0062 | 0.8669 ± 0.0064 | 0.8653 ± 0.0066 |
| α (rad) | 2.1609 ± 0.0024 | 2.2964 ± 0.0027 | 2.2968 ± 0.0025 |
| ρ (10−2) | 1.078 ± 0.017 | 1.218 ± 0.011 | 1.221 ± 0.011 |
| πE, N | – | – | 0.07 ± 0.27 |
| πE, E | – | – | −0.016 ± 0.091 |
| ds/dt (yr−1) | – | −1.722 ± 0.048 | −1.720 ± 0.094 |
| dα/dt (rad yr−1) | – | 0.931 ± 0.026 | 0.939 ± 0.054 |
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