powerlaw ⚬ˣˢᵖᵉᶜ｜appendage｜___｜20260628155835-02-•

A	B
par1	$\alpha$, photon index of power law (dimensionless)
par2	$z$, redshift
norm	$K$, photons/keV/cm${}^2$/s at 1 keV

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