Gamma-ray bursts and Swift

Details Gamma-ray bursts and Swift Gamma-ray bursts and Swift

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26g....46c..18o&link_type=abstract

Astronomy & Geophysics, Volume 46, Issue 3, pp. 3.18-3.22.

Physics

Geophysics

Scientific paper

Discovered by accident using satellites monitoring the nuclear test-ban treaty, gamma-ray bursts (GRBs) are the most powerful explosive events in the Universe. Several GRBs per day occur randomly on the sky, typically lasting a few seconds as a gamma-ray source. This abrupt burst is followed by emission across the entire electromagnetic spectrum which can last for several weeks or more. All GRBs with known redshifts are cosmological objects and appear to be connected to the death of massive stars, in which a black hole is formed that briefly powers a very highly relativistic jet. GRBs are the most luminous objects in the universe and can be seen at all redshifts, making them a crucial probe of how stars and galaxies evolve. Here we summarize our current knowledge of GRBs and describe a new mission called Swift, in which the UK plays a major role. Swift is a uniquely powerful GRB-hunter, able to study GRBs from the instant they are formed until they fade from view.

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