Radioactively-Powered Gamma-Ray Transient Associated with a Kilonova from Neutron Star Merger

Meng-Hua Chen, Rui-Chong Hu, En-Wei Liang

AAssociation of GW170817/GRB170817A/AT2017gfo provides the first direct evidence for neutron star mergers as significant sources of $r$-process nucleosynthesis. A gamma-ray transie…