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notch: absorption line, notch
A notch line absorption. This is model is equivalent to a very saturated absorption line.
![$\displaystyle M(E) = \begin{array}{ll}
(1-f) & E_L - W/2 < E < E_L + W/2 \\ [.2cm]1 & \mbox{elsewhere}
\end{array}$](img484.svg)
par1= |
line energy (keV) |
| par2=W | line width (keV) |
| par3=f | covering fraction |