The deaths of massive stars are sometimes accompanied by the launch of highly relativistic
and collimated jets. If the jet is pointed towards Earth, we observe a 'prompt'gamma-ray burst …

We present the second multi-frequency radio detection of a reverse shock in a γ-ray burst.
By combining our extensive radio observations of the Fermi-Large Area Telescope γ-ray …

We present extensive radio and millimeter observations of the unusually bright GRB
130427A at z= 0.340, spanning 0.67–12 days after the burst. We combine these data with …

We present detailed multiwavelength observations of GRB 161219B at z= 0.1475, spanning
the radio to X-ray regimes, and the first Atacama Large Millimeter/submillimeter Array …

Gamma-ray bursts (GRBs) are the most electromagnetically luminous cosmic explosions.
They are powered by collimated streams of plasma (jets) ejected by a newborn stellar-mass …

Long gamma-ray bursts, which indicate the end-life collapse of very massive stars, are
produced by extremely relativistic jets colliding with circumstellar medium. A huge amount of …

The optical and gamma-ray observations of GRB 080319B allow us to provide a broad-
brush picture for this remarkable burst. The data indicate that the prompt optical and gamma …

ABSTRACT GRB 980923 was one of the brightest bursts observed by the Burst and
Transient Source Experiment. Previous studies have detected two distinct components in …

Abstract GRB 221009A (z= 0.151) is one of the closest known long γ-ray bursts (GRBs). Its
extreme brightness across all electromagnetic wavelengths provides an unprecedented …

We present radio observations of GRB 020405 starting 1.2 days after the burst that reveal a
rapidly fading" radio flare." Based on its temporal and spectral properties, we interpret the …