Astrophysicists have observed the x-ray breakout shock from a distant supernova for only the second time in the past couple of decades. It quickly became clear that the flash was a supernova x-ray breakout, and the supernova was named SN 2026gzf. "The earliest electromagnetic (EM) radiation from core-collapse supernova (SN) explosions is the shock breakout (SBO)," the authors of the second paper explain. "SBO occurs when the radiation-dominated SN explosion shock crosses the surface of an evolved star," they write. However, despite appearing similar to other Ic-BL SNe that did lead to GRBs, SN 2026gzf did not emit one.