Table 3: Adopted circular orbit of BAT129.
Parameter Circular orbit (adopted)
P (days) 2.7689 (fixed)
$K_{\rm WR}$ (km s-1) 316 $\pm$ 5
$K_{\rm O}$ (km s-1) 193 $\pm$ 6
e 0. (fixed)
E0 2 451 946.4274 $\pm$ 0.0054
$\gamma $ (km s-1) 265 $\pm$ 5
$a_{\rm WR}\sin~i$ ($R_{\odot}$) 17.3 $\pm$ 0.4
$a_{\rm O}\sin~i$ ($R_{\odot}$) 10.6 $\pm$ 0.5
$\sigma$(O-C)$_{\rm WR}$ (km s-1) 34.0
$\sigma$(O-C)$_{\rm O}$ (km s-1) 13.4
$M_{\rm WR}\sin^3~i$ ($M_{\odot}$) 14 $\pm$ 2
$M_{\rm O}\sin^3~i$ ($M_{\odot}$) 23 $\pm$ 2


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