How many times more powerful are gammaray bursts than supernovas

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SUMMARY

Gamma-ray bursts (GRBs) are significantly more powerful than supernovae, with the GRB 080916C event recorded in September 2008 demonstrating an energy output equivalent to approximately 9,000 ordinary supernovae. This event, observed in the constellation Carina, showcased the highest-energy emissions and fastest motions ever documented, with gas bullets traveling at 99.9999% the speed of light. GRBs are not merely a result of supernovae; they represent a distinct and extreme astrophysical phenomenon.

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dangerbird
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i just want to know like on average how much stronger usually. thousands or millions? the same?
 
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"The gamma-ray burst GRB 080916C in the constellation Carina, which occurred in September 2008 and recorded by the telescope has been confirmed to have "the greatest total energy, the fastest motions, and the highest-energy initial emissions" ever seen. The explosion had the power of about 9,000 ordinary supernovae, and the gas bullets emitting the initial gamma rays must have moved at 99.9999 percent the speed of light. The tremendous power and speed make this blast the most extreme recorded to date."

From http://en.wikipedia.org/wiki/Fermi_Gamma-ray_Space_Telescope#Discoveries
 

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