Module functions that compute the equivalent width of an emission or absorption line in source or background data.
Float_Type get_eqwidth([Integer_Type],String_Type,String_Type)
Float_Type get_beqwidth([Integer_Type],String_Type,String_Type)
Error Return Values: NULL
Arguments:
(1) Dataset number (default 1)
(2) Expression defining the continuum model
(3) Expression defining the continuum-plus-line model
See the related Sherpa command
EQWIDTH for definitions and more information.
Model a continuum and emission line complex using a power-law and
normalized Gaussian, then compute the equivalent width:
sherpa> SOURCE = POW[cont]+NGAUSS[eline]
...
sherpa> FIT
...
sherpa> EQWIDTH 1 (cont,cont+eline)
EW = 0.535073 keV
sherpa> foo = get_eqwidth(1,"cont","cont+eline")
sherpa> print(foo)
0.535073
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