Uncovering the invisible: A study of Gaia18ajz, a candidate black hole revealed by microlensing

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Table 10.

DarkLensCode output for the GO+ solution for each possible scenario. Estimations of the lens distance and mass, as well as θ_E, and the probability of the lens being a dark remnant.

Parameter	Near	Far
DLProb	85%−100.0%	0.1%−32.7%

StellarIMF

Solution probability	94%	6%
M_L [M_⊙]	$2 . 8_{- 1.1}^{+ 2.3}$ $2.8^{+2.3}_{-1.1}$	$0 . 40_{- 0.14}^{+ 0.19}$ $0.40^{+0.19}_{-0.14}$
D_L [kpc]	$1 . 70_{- 0.66}^{+ 0.79}$ $1.70^{+0.79}_{-0.66}$	$8 . 0_{- 1.2}^{+ 1.1}$ $8.0^{+1.1}_{-1.2}$
θ_E [mas]	$4 . 1_{- 1.5}^{+ 2.9}$ $4.1^{+2.9}_{-1.5}$	$0 . 53_{- 0.15}^{+ 0.20}$ $0.53^{+0.20}_{-0.15}$

DarkIMF

Solution probability	99.9%	0.1%
M_L [M_⊙]	$4 . 9_{- 2.3}^{+ 5.4}$ $4.9^{+5.4}_{-2.3}$	$0 . 59_{- 0.21}^{+ 0.29}$ $0.59^{+0.29}_{-0.21}$
D_L [kpc]	$1 . 14_{- 0.57}^{+ 0.75}$ $1.14^{+0.75}_{-0.57}$	$7 . 3_{- 1.6}^{+ 1.2}$ $7.3^{+1.2}_{-1.6}$
θ_E [mas]	$6 . 5_{- 2.8}^{+ 6.9}$ $6.5^{+6.9}_{-2.8}$	$0 . 69_{- 0.20}^{+ 0.30}$ $0.69^{+0.30}_{-0.20}$

Notes. The minimum probability of dark lens occurrence corresponds to the upper limit of extinction (7.3 mag), while the maximum probability of dark lens occurrence corresponds to the lower limit of extinction (0 mag). The probability of each solution is defined as the sum of the weights in each solution divided by the sum of all weights.

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