Characterizing microlensing planetary system OGLE-2014-BLG-0676Lb with adaptive optics imaging

We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676Lb using adaptive optics (AO) images taken by the Magellan and Keck telescopes. We measure the flux of the light blended with the microlensed source to be K = 16.79 +/- 0.04 mag and J = 17.76 +/- 0.03 mag. Assuming that the blend is the lens star, we find that the host is a 0.73(-0.29)(+0.14)M(circle dot) 2.67(-1.41)(+0.77) kpc, where the relatively large uncertainty in angular Einstein radius measurement is the major source of uncertainty. With mass of M-p=3.68(-1.44)(+0.69)M(J) , the planet is likely a "super Jupiter" at a projected separation of r(perpendicular to)=4.53(-2.50)(+1.49) AU, and a degenerate model yields a similar M-p=3.73(-1.47)(+0.73)M(J) r(perpendicular to)=2.56(-1.41)(+0.84) AU. Our estimates are consistent with the previous Bayesian analysis based on a Galactic model. OGLE-2014-BLG-0676Lb belongs to a sample of planets discovered in a "second-generation" planetary microlensing survey and we attempt to systematically constrain host properties of this sample with high-resolution imaging to study the distribution of planets.