There are a number of reasons why GRB980425 is associated with SN1998bw. Both occurred at the same time, at the same location and in the same direction as each other. SN1998bw is also a rare Type Ib/c supernova instead of the more common Type I or Type II explosions. Furthermore, material from the supernova was ejected at significantly higher speeds than standard supernove explosions.

As material from the explosion was ejected, it pushed a shock wave into the local stellar medium. The shocked material then amplified local magnetic fields which, in turn, accelerated the local electrons. This caused the electrons to emit synchrotron radiation. According to the researchers, the first synchrotron radiation produced was in the gamma-ray part of the spectrum, with the radio waves being emitted later as the shock wave slowed down. However, the researchers admit that if the radio emissions are in the form of jets, they may have overestimated the energy of the shock wave, which might cast doubt on the supernova/gamma-ray burst connection.