10-14-2015, 06:45 PM
Looking at the Discovery.com article, making the assumption that the earlier isolated transit is a single circular object in the neighborhood of the star, a 15% dimming comes to an object ~39% of the star's diameter. That is HUGE!
Digging into the more detailed light curves in the paper at http://arxiv.org/abs/1509.03622, that event appears to be a largely transparent or dispersed object or cluster even larger across than the star, with a core denser than the periphery.
Digging into the more detailed light curves in the paper at http://arxiv.org/abs/1509.03622, that event appears to be a largely transparent or dispersed object or cluster even larger across than the star, with a core denser than the periphery.