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An optical spectrum of the afterglow of a γ-ray burst at a redshift of z = 6.295
- N. Kawai, G. Kosugi, A. Yoshida
- PhysicsNature
- 9 March 2006
The prompt γ-ray emission from γ-ray bursts (GRBs) should be detectable out to distances of z > 10 (ref. 1), and should therefore provide an excellent probe of the evolution of cosmic star formation,…
An exceptionally bright flare from SGR 1806–20 and the origins of short-duration γ-ray bursts
Soft-γ-ray repeaters (SGRs) are galactic X-ray stars that emit numerous short-duration (about 0.1 s) bursts of hard X-rays during sporadic active periods. They are thought to be magnetars: strongly…
An unusual supernova in the error box of the γ-ray burst of 25 April 1998
- T. Galama, P. Vreeswijk, P. Ianna
- PhysicsNature
- 15 October 1998
The discovery of afterglows associated with γ-ray bursts at X-ray, optical and radio wavelengths and the measurement of the redshifts of some of these events, has established that γ-ray bursts lie at…
An X-ray pulsar with a superstrong magnetic field in the soft γ-ray repeater SGR1806 − 20
- C. Kouveliotou, S. Dieters, T. Murakami
- PhysicsNature
- 21 May 1998
Soft γ-ray repeaters (SGRs) emit multiple, brief (∼0.1-s), intense outbursts of low-energy γ-rays. They are extremely rare—three are known in our Galaxy and one in the Large Magellanic Cloud. Two…
The afterglow of GRB 050709 and the nature of the short-hard γ-ray bursts
The final chapter in the long-standing mystery of the γ-ray bursts (GRBs) centres on the origin of the short-hard class of bursts, which are suspected on theoretical grounds to result from the…
A short γ-ray burst apparently associated with an elliptical galaxy at redshift z = 0.225
- N. Gehrels, C. Sarazin, R. Wijers
- PhysicsNature
- 31 May 2005
Gamma-ray bursts (GRBs) come in two classes: long (> 2 s), soft-spectrum bursts and short, hard events. Most progress has been made on understanding the long GRBs, which are typically observed at…
Detection of a γ-ray burst of very long duration and very high energy
ALTHOUGH γ-ray bursts (GRBs) have been known for more than 20 years, their origin remains mysterious1. Suggestions have ranged from nearby colliding comets2 to merging neutron stars at cosmological…
The Host Galaxy of GRB 031203: Implications of Its Low Metallicity, Low Redshift, and Starburst Nature
- J. Prochaska, J. Bloom, W. Vacca
- Physics
- 3 February 2004
We present Keck/NIRSPEC near-IR images and Magellan/IMACS optical spectroscopy of the host galaxy of GRB 031203. The host is an actively star-forming galaxy at z = 0.1055 ± 0.0001. This is the lowest…
A giant periodic flare from the soft γ-ray repeater SGR1900+14
- K. Hurley, T. Cline, J. Trombka
- PhysicsNature
- 27 November 1998
Soft γ-ray repeaters are transient sources of high-energy photons; they emit sporadic and short (about 0.1 s) bursts of ‘soft’ γ-rays during periods of activity, which are often broken by long…
Closing in on a Short-Hard Burst Progenitor: Constraints from Early-Time Optical Imaging and Spectroscopy of a Possible Host Galaxy of GRB 050509b
- J. Bloom, J. Prochaska, W. Wood-Vasey
- Physics
- 24 May 2005
The localization of the short-duration, hard-spectrum gamma-ray burst GRB 050509b by the Swift satellite was a watershed event. We report the discovery of the probable host galaxy, a bright…
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