The First Circumbinary Planet Found by Microlensing: OGLE-2007-BLG-349L(BA)c
D. P. Bennett et al 2016 AJ 152 125
The first circumbinary microlensing event, OGLE-2007-BLG-349, reveals a planet orbiting two M dwarf stars that total ~0.7 solar masses. This is the lowest-mass circumbinary planet system known.