A new series of observation of the Crab Nebula in TeV gamma rays using an improved camera on the Whipple Observatory 10 m Optical Reflector is reported. The...
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PublicationGamma-ray observations of the Crab Nebula at TeV energies
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PublicationGas and dust properties in the afterglow spectra of GRB 050730
We present early WHT ISIS optical spectroscopy of the afterglow of gamma-ray burst GRB 050730. The spectrum shows a DLA system with the highest measured...
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PublicationGRB 011121: A Collimated Outflow into Wind-blown Surroundings
We report optical and near-infrared follow-up observations of GRB 011121 collected predominantly at ESO telescopes in Chile. We discover a break in the...
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PublicationGRB 050713A: High-Energy Observations of the Gamma-Ray Burst Prompt and Afterglow Emission
Swift discovered GRB 050713A and slewed promptly to begin observing with its narrow-field instruments 72.6 s after the burst onset, while the prompt gamma-ray...
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PublicationGRB 050904 at redshift 6.3: observations of the oldest cosmic explosion after the Big Bang
We present optical and near-infrared observations of the afterglow of the gamma-ray burst GRB 050904. We derive a photometric redshift z = 6.3, estimated from...
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PublicationGRB 051028: an intrinsically faint gamma-ray burst at high redshift?
Aims.We present multiwavelength observations of the gamma-ray burst GRB 051028 detected by HETE-2 in order to derive its afterglow emission parameters and to...
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PublicationGRB 060121: Implications of a Short-/Intermediate-Duration γ-Ray Burst at High Redshift
Since the discovery of the first short-population γ-ray burst (GRB) afterglows in 2005, the handful of observed events have been found to be embedded in nearby...
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PublicationGRB 060605: multi-wavelength analysis of the first GRB observed using integral field spectroscopy
The long and relatively faint gamma-ray burst GRB 060605 detected by Swift/BAT lasted about 20 s. Its afterglow could be observed with Swift/XRT for nearly 1...
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PublicationGRB 080913 at Redshift 6.7
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...