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About the Poster
One of the most amazing things about gamma-ray bursts
is their enormous power. Power is defined as the amount of energy
emitted per unit time. Shown on the poster is a bar graph which
compares the power emitted by several different radiant objects or
events. The values given represent the peak power output of each. In
other words, it is a snapshot in time at the instant each object or
event is emitting the greatest amount of power it will ever emit. Some
things - like the light bulb - emit constant power over
time. Other things like a supernova explosion or a gamma-ray burst can
emit enormous amounts of power one second and thousands or hundreds of
thousands of times less power the next second. By showing peak power,
we allow ourselves to compare very different things like light bulbs
and supernovae in a meaningful way. Simply put, we display on our
graph the following information: in the one second (whenever it
occurred) that they each emitted their maximum power, what was it?
It may be interesting to consider the total power emitted as
well. This takes into account the amount of time that each object or
event emitted energy and how much energy they emitted as a function of
time. Consider this, the total power emitted by a supernova is only
about a factor of 10 less than that of a gamma-ray burst. What does
this tell us about the amounts of time over which these events
occur?
Download a pdf version.
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