SN 1998bw
Encyclopedia
SN 1998bw was a rare type I/Ib gamma ray
supernova
detected on 26 April 1998 in the ESO 184-G82 spiral galaxy
, which some astronomers believe may be an example of a collapsar. The supernova has been linked to GRB 980425
, which was detected on 25 April 1998, the first time a gamma-ray burst has been linked to a supernova.
Gamma ray
Gamma radiation, also known as gamma rays or hyphenated as gamma-rays and denoted as γ, is electromagnetic radiation of high frequency . Gamma rays are usually naturally produced on Earth by decay of high energy states in atomic nuclei...
supernova
Supernova
A supernova is a stellar explosion that is more energetic than a nova. It is pronounced with the plural supernovae or supernovas. Supernovae are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy, before fading from view over several weeks or months...
detected on 26 April 1998 in the ESO 184-G82 spiral galaxy
Spiral galaxy
A spiral galaxy is a certain kind of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as...
, which some astronomers believe may be an example of a collapsar. The supernova has been linked to GRB 980425
GRB 980425
GRB 980425 was a gamma-ray burst that was detected on 25 April 1998 at 21:49 UTC. A gamma-ray burst is a highly luminous flash associated with an explosion in a distant galaxy and producing gamma rays, the most energetic form of electromagnetic radiation, and often followed by a longer-lived...
, which was detected on 25 April 1998, the first time a gamma-ray burst has been linked to a supernova.