Until recently, the range was rarely studied and few
sources existed for microwave
energy at the high end
of the
band (sub-millimeter waves or so - called terahertz waves), but applications such
as imaging and communications are now appearing.
A narrow
band of them in the high -
energy spectrum would be a «smoking gun» for the presence
of dark matter, says Michelson, but he thinks it's more likely that the dark matter emission would be mixed in with gamma rays from other
energy sources in the universe and that scientists such
as GLAST pioneer Elliott Bloom will have to work very hard to untangle the GLAST data to find it.