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Article
Open AccessPrecise measurements of self-absorbed rising reverse shock emission from gamma-ray burst 221009A
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 due to internal shocks...
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Article
Gigaelectronvolt emission from a compact binary merger
An energetic γ-ray burst (GRB), GRB 211211A, was observed on 11 December 20211,2. Despite its long duration, typically associated with bursts produced by the collapse of massive stars, the observation of an optic...
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Chapter
Common Nerve Blocks of the Lower Limb
The lumbar plexus is formed by the loops of communication between the anterior roots of the first three lumbar nerves, the greater part of the fourth nerve fibres and, in as many as 50 % of cases, by a branch ...