Have not heard of this CHIME detector for FRB's before. Pretty cool that its data lines up with LIGO's detected grav waves timewise for this particular incident.

If I read this right, the idea is two neutron stars smash into each other sending out the ripples in spacetime, then soon after they collapse into a black hole, creating the FRB via an instantly disappearing magnetic field. I don't really understand the physics of this but it's a heck of a thing to contemplate..