  We report the discovery, via the microlensing method, of a new very-low-mass
binary system. By combining measurements from Earth and from the Spitzer
telescope in Earth-trailing orbit, we are able to measure the microlensing
parallax of the event, and find that the lens likely consists of an $(12.0 \pm
0.6) M_{\rm J}$ + $(15.7 \pm 1.5) M_{\rm J}$ super-Jupiter / brown-dwarf pair.
The binary is located at a distance of $(3.08 \pm 0.18)$ kpc in the Galactic
Plane, and the components have a projected separation of $(0.43 \pm 0.03)$ AU.
Two alternative solutions with much lower likelihoods are also discussed, an 8-
and 6-$M_{\rm J}$ model and a 90- and 70-$M_{\rm J}$ model. Although disfavored
at the 3-$\sigma$ and 5-$\sigma$ levels, these alternatives cannot be rejected
entirely. We show how the more-massive of these models could be tested with
future direct imaging.
