OGLE-2015-BLG-1609Lb: A sub-Jovian planet orbiting a low-mass stellar or brown dwarf host

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Volume 698 (June 2025)

A&A, 698 (2025) A126

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Table 5

Lensing parameters, fitted to all available datasets.

	Inner-large q, u₀+	Small q, u₀+	Outer-large q, u₀+
χ²/d.o.f.	3248.3/3405	3239.4/3405	3251.1/3405
q [10⁻³]	${1.33}_{- 0.16}^{+ 0.18}$ $\[1.33_{-0.16}^{+0.18}\]$	${0.225}_{- 0.026}^{+ 0.032}$ $\[0.225_{-0.026}^{+0.032}\]$	1.23 ± 0.19
s	1.416 ± 0.013	${1.2106}_{- 0.0061}^{+ 0.0076}$ $\[1.2106_{-0.0061}^{+0.0076}\]$	${1.069}_{- 0.017}^{+ 0.023}$ $\[1.069_{-0.017}^{+0.023}\]$
t₀ [HJD ^(a)]	${7261.98}_{- 0.25}^{+ 0.20}$ $\[7261.98_{-0.25}^{+0.20}\]$	${7261.77}_{- 0.25}^{+ 0.22}$ $\[7261.77_{-0.25}^{+0.22}\]$	${7261.92}_{- 0.26}^{+ 0.21}$ $\[7261.92_{-0.26}^{+0.21}\]$
u₀	0.3180 ± 0.0074	${0.3138}_{- 0.0076}^{+ 0.0067}$ $\[0.3138_{-0.0076}^{+0.0067}\]$	0.3056 ± 0.0072
t_E [d]	${28.54}_{- 0.49}^{+ 0.70}$ $\[28.54_{-0.49}^{+0.70}\]$	${29.00}_{- 0.57}^{+ 0.90}$ $\[29.00_{-0.57}^{+0.90}\]$	${29.12}_{- 0.51}^{+ 0.73}$ $\[29.12_{-0.51}^{+0.73}\]$
ρ	${0.0085}_{- 0.0060}^{+ 0.0089}$ $\[0.0085_{-0.0060}^{+0.0089}\]$	${0.0469}_{- 0.0025}^{+ 0.0019}$ $\[0.0469_{-0.0025}^{+0.0019}\]$	${0.018}_{- 0.013}^{+ 0.015}$ $\[0.018_{-0.013}^{+0.015}\]$
α [deg]	${308.55}_{- 0.42}^{+ 0.56}$ $\[308.55_{-0.42}^{+0.56}\]$	${309.83}_{- 0.51}^{+ 0.65}$ $\[309.83_{-0.51}^{+0.65}\]$	${309.63}_{- 0.45}^{+ 0.62}$ $\[309.63_{-0.45}^{+0.62}\]$
π_E,N ^(b)	$- {0.06}_{- 0.54}^{+ 0.62}$ $\[-0.06_{-0.54}^{+0.62}\]$	0.21 ± 0.57	$- {0.07}_{- 0.55}^{+ 0.63}$ $\[-0.07_{-0.55}^{+0.63}\]$
π_E,E ^(b)	$- {0.033}_{- 0.041}^{+ 0.051}$ $\[-0.033_{-0.041}^{+0.051}\]$	$- {0.059}_{- 0.033}^{+ 0.043}$ $\[-0.059_{-0.033}^{+0.043}\]$	$- {0.030}_{- 0.038}^{+ 0.051}$ $\[-0.030_{-0.038}^{+0.051}\]$

Notes. Parameters of the best 2L1S+parallax model topologies. ^(a)HJD-2450000. ^(b)For the reference time t_0,par = 2457267.5 HJD.

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