GRB 111209A

GRB 111209A is the longest lasting gamma-ray burst (GRB) detected by the Swift Gamma-Ray Burst Mission, observed on December 9, 2011.[1] Its duration is longer than 7 hours, implying this event has a different kind of progenitor than normal long GRBs. It was first proposed that the progenitor of this event was a blue supergiant star with low metallicity. Later, it has also been proposed that this event is the prototype of a new class of GRBs, ultra-long GRBs.

GRB 111209A
Other designationsGRB 111209A, SN 2011kl
Event typeGamma-ray burst, supernova 
Spectral classSNSLSN 
Date9 December 2011 
Durationat least 7 hours
InstrumentNeil Gehrels Swift Observatory 
ConstellationPhoenix 
Right ascension00h 57m 22.63s
Declination−46° 48 03.8
Redshift0.677 ±0.001 

The GRB was associated with the magnetar-powered supernova 2011kl, an object of intermediate luminosity between conventional GRB supernovae and superluminous supernovae.[2]

See also

References

  1. Gendre, B.; Stratta, G.; Atteia, J. L.; Basa, S.; Boër, M.; Coward, D. M.; Cutini, S.; D'Elia, V.; Howell, E. J.; Klotz, A.; Piro, L. (2013). "The Ultra-long Gamma-Ray Burst 111209A: The Collapse of a Blue Supergiant?". Astrophysical Journal. 766 (1): 30. arXiv:1212.2392. Bibcode:2013ApJ...766...30G. doi:10.1088/0004-637X/766/1/30.
  2. Greiner, J.; et al. (2015). "A very luminous magnetar-powered supernova associated with an ultra-long γ-ray burst". Nature. 523 (7559): 189–192. arXiv:1509.03279. Bibcode:2015Natur.523..189G. doi:10.1038/nature14579. PMID 26156372.

Preceded by
GRB 060218
Longest gamma-ray burst
2011  
Succeeded by
current
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