An Isolated Microlens Observed from K2, Spitzer, and Earth
Wei Zhu et al 2017 ApJL 849 L31
MOA-2016-BLG-290, a lensing low-mass star or brown dwarf in the galactic bulge, is the first microlensing event for which we have signals from three well-separated locations: Spitzer, K2, and Earth.