2000ApJ...538L.133G

We propose a direct method to detect close-in Jupiter-sized planets orbiting stars in the Galactic bulge. This method uses caustic-crossing binary microlensing events discovered by survey teams monitoring the bulge to measure light from a planet orbiting the source star. When the planet crosses the caustic, it is more magnified than the source star; its light is magnified by 2 orders of magnitude for Jupiter-sized planets. If the planet has a large radius and is close to the star, it may be bright enough to make a significant deviation in the light curve of the star. Detection of this deviation requires intensive monitoring of the microlensing light curve using a 10 m-class telescope for a few hours after the caustic. This is the only method yet proposed to detect reflected light from close-in planets around stars outside the solar neighborhood.