This artist's illustration depicts the aftermath of a neutron star merger, including the generation of a Gamma-ray burst (GRB). In the center is a compact object - either a black hole or a massive neutron star - and in red is a disk of material left over from the merger, containing material falling towards the compact object. Energy from this infalling material drives the GRB jet shown in yellow. In orange is a wind of particles blowing away from the disk and in blue is material ejected from the compact object and expanding at very high speeds of about one tenth the speed of light.
Image Credit: NASA/CXC/M.Weiss
Explanation from: http://chandra.harvard.edu/photo/2016/grb/more.html