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The line display window

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), FWHM (line width), and weight (usually 0.0, but see Sect. 7.1). In addition, there are fields to

  1. select the profile type (Gauss/Lorentz),
  2. enable/disable fitting of the wavelength
  3. enable/disable fitting of the line width, and
  4. lock the wavelength to that of the preceding line.
  5. 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).


next up previous contents
Next: From the command line Up: With the graphical user Previous: With the graphical user   Contents
Jan-Uwe Ness
2003-05-23