The giant gamma-ray flare event, designated GRB 2001415, was emitted by a powerful magnetar in NGC 253, an active starburst galaxy approximately 11 million light-years away in the constellation of Sculptor. An artist’s impression of a giant magnetar flare. Image credit: Universitat de València. “Magnetars are strongly magnetized, isolated neutron stars with magnetic fields up to around 1015 gauss, luminosities of approximately 1031-1036 ergs per...
