Ortiz and coauthors note that during past stellar occultations of Chiron, observers noted dimming of the stars before and after the occultation, and attributed them to comet-like jets. But given the discovery of rings at Chariklo, it made sense to look at those Chiron occultations again and see if they might have been due to rings. I can't critique the quality of the arguments in the paper, but a ring around Chiron seems at least as plausible as symmetric jets of comet-like material as an explanation for secondary occultations, and the paper makes some interesting points about things planetary astronomers should think about, if rings turn out to be common in the outer solar system.

The dynamics of planetary rings dictate that they are pretty much circular and pretty much flat. Their orientation in space stays constant over time, and if that orientation is tilted with respect to the ecliptic, we viewers on Earth will observe the ring system more open and better lit at some times, and more closed and less lit at other times. Uranus provides a nice illustration: