@ Voigt Profile Accuracy of VPFIT

VPGuess website says that, "VPFIT uses a Voigt profile generation routine that is less accurate (but faster) than that used by vpguess (see below). So the model spectrum displayed by vpguess is not exactly that fit by VPFIT."

Includes links to Bob Well's page and Michael Murphy's Thesis which has a section on the Voigt profile in Appendix A.

So it looks like, if you are you are using the best Voigt profile fit that you can, you are probably getting a better Voigt profile than VPFIT.

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