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X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
- J. Vernet, H. Dekker, A. Zacchei
- Physics
- 10 October 2011
X-shooter is the first 2nd generation instrument of the ESO Very Large Telescope(VLT). It is a very efficient, single-target, intermediate-resolution spectrograph that was installed at the Cassegrain…
A photometric redshift of z ∼9.4 for GRB 090429B
- A. Cucchiara, A. Levan, P. D’Avanzo
- Physics
- 25 May 2011
Gamma-ray bursts (GRBs) serve as powerful probes of the early universe, with their luminous afterglows revealing the locations and physical properties of star-forming galaxies at the highest…
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…
An Extremely Luminous Panchromatic Outburst from the Nucleus of a Distant Galaxy
TLDR
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…
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…
Swift identification of dark gamma-ray bursts
- P. Jakobsson, J. Hjorth, J. Gorosabel
- Physics
- 1 November 2004
We present an optical flux vs. X-ray flux diagram for all known gamma-ray bursts (GRBs) for which an X-ray afterglow has been detected. We propose an operational definition of dark bursts as those…
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…
GRB 080913 AT REDSHIFT 6.7
- J. Greiner, T. Kruehler, K. Wiersema
- Physics
- 13 October 2008
We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND, which led to the discovery of its optical/NIR afterglow and the recognition of…
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…
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