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            notch:  absorption line, notch

A notch line absorption. This is model is equivalent to a very saturated absorption line.

M(E) =

(1-f) for E_L - W/2 < E < E_L + W/2

1          elsewhere

where

par1= EL

line energy (keV)

par2= W

line width (keV)

par3= f

covering fraction