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An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy
Multiwavelength observations of a unique γ-ray–selected transient detected by the Swift satellite, accompanied by bright emission across the electromagnetic spectrum, and whose properties are unlike any previously observed source are presented.
Long γ-ray bursts and core-collapse supernovae have different environments
- A. Fruchter, A. Levan, S. Woosley
- PhysicsNature
- 20 March 2006
When massive stars exhaust their fuel, they collapse and often produce the extraordinarily bright explosions known as core-collapse supernovae. On occasion, this stellar collapse also powers an even…
A γ-ray burst at a redshift of z ≈ 8.2
Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z > 20 using…
LOFAR, the low frequency array
- M. V. Haarlem, M. Wise, J. V. Zwieten
- PhysicsOther Conferences
- 1 February 2010
In dit artikel zullen the authors LOFAR beschrijven: van de astronomische mogelijkheden met de nieuwe telescoop tot aan een nadere technische beshrijving of het instrument.
A very energetic supernova associated with the γ-ray burst of 29 March 2003
- J. Hjorth, J. Sollerman, R. Wijers
- PhysicsNature
- 17 June 2003
Over the past five years evidence has mounted that long-duration (>2 s) γ-ray bursts (GRBs)—the most luminous of all astronomical explosions—signal the collapse of massive stars in our Universe. This…
No supernovae associated with two long-duration γ-ray bursts
It is now accepted that long-duration γ-ray bursts (GRBs) are produced during the collapse of a massive star1,2. The standard ‘collapsar’ model3 predicts that a broad-lined and luminous type Ic…
High Column Densities and Low Extinctions of Gamma-Ray Bursts: Evidence for Hypernovae and Dust Destruction
We analyze a complete sample of γ-ray burst afterglows and find X-ray evidence for high column densities of gas around them. The column densities are in the range 1022-1023 cm-2, which is right…
The optical afterglow of the short gamma-ray burst associated with GW170817
The binary neutron star merger GW170817 was the first multi-messenger event observed in both gravitational and electromagnetic waves1,2. The electromagnetic signal began approximately two seconds…
The effect of magnetic fields on γ-ray bursts inferred from multi-wavelength observations of the burst of 23 January 1999
- T. Galama, M. Briggs, D. Bhattacharya
- PhysicsNature
- 1 April 1999
Gamma-ray bursts (GRBs) are thought to arise when an extremely relativistic outflow of particles from a massive explosion (the nature of which is still unclear) interacts with material surrounding…
An expanding radio nebula produced by a giant flare from the magnetar SGR 1806–20
- B. Gaensler, C. Kouveliotou, P. Woods
- PhysicsNature
- 20 February 2005
From day 6 to day 19 after the flare from SGR 1806 - 20, a resolved, linearly polarized, radio nebula was seen, expanding at approximately a quarter of the speed of light, and to create this nebula, at least 4 × 1043 ergs of energy must have been emitted by the giant flare.
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