Two of the most spectacular events in astrophysics - supernovae explosions and gamma-ray bursts - may be related according to three teams of astronomers. The link between certain types of supernovae and gamma-ray bursts has been suggested by the odd behavior of a supernova observed earlier this year. SN1998bw appeared unusually bright at radio wavelengths when it exploded in April. This indicated that the shock wave from the center of the explosion was travelling at relativistic speeds. The astronomers argue that this shock wave was so energetic that it also produced the gamma-ray burst observed on April 25. Indeed, GRB980425 is so different from other gamma-ray bursts that the astronomers say it should have its own classification (Nature 395 663, 670, 672).
Gamma-ray bursts spring more surprises
16 Oct 1998