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GRB 971214

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GRB 971214
Event typeGamma-ray burst Edit this on Wikidata
ConstellationUrsa Major Edit this on Wikidata
Redshift3.418 Edit this on Wikidata
Other designationsGRB 971214
[edit on Wikidata]

GRB 971214 (1SAX J1156.4+6513) is a gamma-ray burst observed in 1997. It originated 12 billion light years away. For a brief period this was thought by some researchers to have been the most energetic event observed in the universe, but this was before it was established that gamma-ray bursts are beamed towards the Earth. Thus, at the time of the discovery it was hypothesized by G. Djorgovski and his collaborators that the outburst put out more energy than several hundred typical supernovae, or the energy our galaxy puts out over a couple of centuries. However, a couple of years later it was realized that this was an upper limit as it is likely that the burst was directed towards Earth. If the jet had an opening angle of only a few degrees, the burst energy could have been thousands of times lower. The X-ray afterglow and the host galaxy of the GRB have also been observed, using BeppoSAX and Keck II respectively. The host galaxy lies at redshift z=3.4.

Since the beaming phenomenon was not yet established at the time of the discovery, the media responded by giving GRB 971214 the nickname Big Bang 2.

References

  1. Sari, R.; Piran, T.; Halpern, J. P. (1999). "Jets in Gamma-Ray Bursts". Astrophysical Journal. 519 (1): L17–L20. arXiv:astro-ph/9903339. Bibcode:1999ApJ...519L..17S. doi:10.1086/312109.
  2. Frail, D.A.; et al. (2001). "Beaming in Gamma-Ray Bursts: Evidence for a Standard Energy Reservoir". Astrophysical Journal. 562 (1): L55–L58. arXiv:astro-ph/0102282. Bibcode:2001ApJ...562L..55F. doi:10.1086/338119.
  3. Schilling, Govert (2002). Flash! The hunt for the biggest explosions in the universe. Cambridge: Cambridge University Press. pp. 152. ISBN 0-521-80053-6.

External links

Records
Preceded byGRB 970508 Most distant gamma-ray burst
1997 — 2000 		Succeeded byGRB 000131
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