With a Second Repeating Radio Burst, Astronomers Close in on an Explanation

Along with scores of other researchers around the world, Metzger has spent the last few years brainstorming ways to understand fast radio bursts (FRBs). A new Canadian radio telescope called CHIME is expected to find between one and 10 FRBs each day after it becomes fully operational later this year. And last November, the astronomer Jason Hessels (with Spitler and others) noticed something else strange: Each split-second burst actually contains a few sub-bursts that, without fail, shift downward from higher to lower radio frequencies.

Source: www.quantamagazine.org