Kardashev, type II
Continuing an earlier thread of mine from a while back...
This is almost certainly a false alarm, but it's exactly how you would expect discovery of ETI to happen.
http://www.theatlantic.com/science/archive/2015/10/the-most-interesting-star-in-our-galaxy/410023/
The paper on the Kepler data:
http://arxiv.org/pdf/1509.03622v1.pdf
