after glow

The detection of gravitational waves from the impact of the collision of two neutron stars (the event is named a kilonova)—thanks to the addition of a third facility near Pisa—allowed astronomers to triangulate the source of the bloop and trace it back to its origins in the sky and pair the visual the remnants (the previous soundings involving black holes) of the explosion with its sound-profile.
Equipped with this extra dimension of data, scientists were able to study the coronal spectra to confirm the conjecture that such violent events seed the Cosmos with gold and other heavy elements and are the source of gamma ray bursts. Moreover, measurements once refined may show the lag time between the propagation of waves of light versus waves of gravity and if seen to be reliable in their spread, could be a second cosmic distance ladder to compliment the Doppler shift of distant objects moving away or moving towards us.