Dwarf Star Acts As Cosmic Magnifying Glass, Confirming Prediction Made Decades Ago

Astronomers have observed a white dwarf acting as a magnifying glass for another, Sun-like star that it is orbiting. The binary star system, 808 parsecs (2,600 light years) away from Earth in the constellation Lyra, was previously classified as a possible exoplanet system.

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In the Kepler database of light curves, there are many features such as stellar flares and transits. But there is also a small public collection of observed “inverse transits” where a star brightens for a short period of time consistent with the passing in front of it of an object that magnifies the light of the star.

It looks like the description given of a dwarf star acting as a magnifying glass is the most likely answer.