Type Ia supernova
SN2014J was observed by the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) which detected the gamma-ray spectral lines characteristic of the radioactive decay chain 56Ni→56Co→56Fe. This was the first time these lines were detected in a Type Ia supernova, providing support for the standard model that this class of supernova produces large quantities of 56Ni through nucleosynthesis.