[curiouscat]

What does "spectral hardness" mean?

Context, this abstract snippet: "Here, we show that a short gamma-ray burst (GRB) in our Galaxy
is consistent with all observables: Such an event is sufficiently short and provides the
necessary energy in the relevant spectral range of γ-rays. Its spectral hardness is
consistent with the differential production rates of ¹⁴C and ¹⁰Be as observed. T"

Google wasn't very illuminating....

[Hunter2]

Hardness for X-ray and y-ray can be compared like the color of light. IR to UV.

High hardness means high frequency and small wave length. And weak hardness means the opposite small frequency and high wave length.

[curiouscat]

That simple, eh? You might be right but I'm surprised.