Table 8.
Physical parameters of the single lens in Gaia19bld computed for different modelling approaches.
| 2*Parameter | Ground-based+ | Spitzer-“only” | Ground-based+ |
|---|---|---|---|
| Gaia | constrained | Gaia+Spitzer | |
| πE |
 |
 |
 |
| DL [kpc] |
 |
 |
 |
| ML [M⊙] |
 |
 |
 |
| μrel, hel, N [mas yr−1] | −1.39 ± 0.16 | −1.50 ± 0.04 | −1.49 ± 0.04 |
| μrel, hel, E [mas yr−1] | −2.39 ± 0.16 | −2.37 ± 0.05 | −2.36 ± 0.05 |
| μL, hel, l [mas yr−1] | −9.74 ± 0.16 | −9.70 ± 0.05 | −9.69 ± 0.05 |
| μL, hel, b [mas yr−1] | −1.83 ± 0.16 | −1.93 ± 0.05 | −1.93 ± 0.05 |
Notes. All three agree very well, while the constrained Spitzer-“only” method and global fit to ground+Gaia+Spitzer data yield almost identical results. The values of ML and DL were derived from the measured values of θ* and DS by B21.
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