Blackbody Radiation
is the light given off by an object due to its temperature.
For the data fitting software, conversions must be made between
apparent magnitude in a given
bandpass filter
and the intensity of light predicted by
blackbody radiation.

Algorithm

This viewer starts by taking a range of frequencies and plotting them on a graph.
It then determines two other views. First, it plots each frequency at a different color
and brightness, interpolating
against known values. The actual observed color of a hot object can be difficult to compute.
In this case, we simply start with observed colors associated with given temperatures, and
interpolate to determine
what color to show on the screen.

For the data fitting tool, a
chi-squared value
is used to measure goodness of fit.

Architecture

The Blackbody Spectrum Viewer and the Blackbody Data Fitting Tool are
both
Java applets.