Meanwhile...
GW170817: the X-ray emission did what?
"The optical signal or ‘'messenger’', for example, may carry slightly different information about the source than the radio waves do. So, if we manage to detect both, we end up with an additional clue about whatever produced them! Here, we will discuss the X-ray observations of GW170817/GRB 170817A."
https://astrobites.org/2018/02/06/gw170817-the-x-ray-emission-did-what/