A new version of the program FITTER for fitting atomic hyperfine structure in optical spectra including the calculation of confidence intervals

The program FITTER, which has been used successfully for many years to analyze the hyperfine structure in atomic and ionic spectra, has been extended. Confidence intervals for all adjusted parameters are now calculated, adding essential information to the results. A brief overview of the theoretical basics of hyperfine structure is given, the calculation of the confidence intervals is presented and the application is discussed using an example. (C) 2022 Elsevier Ltd. All rights reserved.

Automated summary

This paper introduces an extended version of the FITTER program, which can now calculate confidence intervals for adjusted parameters when analyzing hyperfine structure. The addition of confidence intervals provides essential information to the results. The application is discussed using an example.