edge, zedge: absorption edge

The edge model is absorption edge, given by

$$M(E) = \begin{array}{ll} 1 & E \leq E_c\\ [.2cm]exp\left[-D(E/E_c)^{-3}\right] & E \geq E_c \end{array}$$

where:

par1=$E_c$	threshold energy
par2=$D$	absorption depth at the threshold

The zedge model given by

$$M(E) = \begin{array}{ll} 1 & E < E_c\\ [.2cm]exp\left(-D\left[E(1+z)/E_c\right]^3\right) & E > E_c \end{array}$$

allows a redshift z where:

par1=$E_c$	threshold energy
par2=$D$	absorption depth at the threshold
par3=z	redshift

HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public

Last modified: Friday, 23-Aug-2024 13:20:40 EDT