K2-2016-BLG-0005Lb: the first space based discovery of an exoplanet via microlensing

Radosław Poleski on behalf of David Specht  ✧  The University of Manchester, UK

We present the first bound exoplanet to be discovered blindly from a space-based observatory. K2-2016-BLG-0005Lb occurred during microlensing Campaign 9 of Kepler’s K2 mission (K2C9). The cadence of Kepler provided well sampled lightcurve photometry throughout caustic entry and exit. When supplemented with ground photometry from OGLE, MOA, CFHT and KMTNet, the data allowed a direct mass measurement through parallax and finite source effects that confirms the planetary companion. We report on the details of this object and its significance for the emerging era of space-based exoplanet microlensing.