The largest known structure in the universe, the Hercules-Corona Borealis Great Wall, was mapped using these events. The Band function is used to describe the spectra of these objects, and their flux 
The largest known structure in the universe, the Hercules-Corona Borealis Great Wall, was mapped using these events. The Band function is used to describe the spectra of these objects, and their flux shows a four-part power law distribution with a blackbody tail. One device used to map these events contains the BAT and XRT instruments and is named for its very fast slew rate. These phenomena show a delay between low-energy and high-energy phases known as spectral lag. As these events slow down and fade, they exhibit a power-law decay in their afterglow due to a "jet break". One of these events occurring during the (*) Super Bowl nearly overloaded the EGRET instrument.  The Swift mission, BATSE mission and Compton observatory are used to detect them, which may have caused the Ordovician-Silurian extinction. The short-hard ones are believed to be caused by mergers of compact objects, and the collapsar and hypernova models are used to explain their more common long-soft variety. For 10 points, name these energetic events in astrophysics that are named for the high frequency radiation they emit.
The largest known structure in the universe, the Hercules-Corona Borealis Great Wall, was mapped using these events.
gamma ray bursts [or GRB]