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The line window (title string: ''Start values'') is the window
where you can define start values for
the lines you want to fit. It will pop up on start of the GUI, as well as
whenever you change the number of lines in the main window.
You can set initial values for lambda (wavelength), sigma (line
width), and weight (usually 0.0, but see Sect. 7.1). In addition,
there are fields to
- select the profile type (Gauss/Lorentz),
- enable/disable fitting of the wavelength
- enable/disable fitting of the line width, and
- lock the wavelength to that of the preceding line.
- set '' Beta'' values for powers of Lorentzians
Note that locking the wavelength to that of the preceding line has a special
meaning if the profiles are different: it will cause the program to
use a (Pseudo-)Voigt profile with weighted Gaussian and Lorentzian
contributions having (starting) values of the line widths as
specified (see Sect. 7.3).
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Jan-Uwe Ness
2003-05-23