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GlobalSplineFit

Cosmic ray flux parametrizations with uncertainty quantification

GlobalSplineFit (GSF) is a Python package that provides precise parametrizations of cosmic ray flux and composition based on spline fits to experimental data.

  • GSF Explorer

    Explore the model interactively in your browser — fluxes, composition, uncertainties, data export. No installation needed.

    Open the Explorer

  • Tutorials

    Interactive notebooks running in your browser — editable, and downloadable to run locally.

    Tutorial gallery

  • User Guide

    Model classes, versions, particle groups, solar modulation, and uncertainty quantification.

    User Guide

  • API Reference

    Detailed descriptions of classes, methods, and parameters.

    API Reference

Using GSF as a dependency in your own code, or running the notebooks and the Explorer locally? See Getting Started.

Citation

Please cite the GSF 2026 paper (arXiv:2609.32649) together with the software version you used.

@article{Fedynitch:2026ugq,
    author = "Fedynitch, Anatoli and Fujisue, Kozo and Dembinski, Hans and Engel, Ralph",
    title = "{Global Spline Fit: A unified data-driven view of the cosmic-ray spectrum and mass composition from GeV to the highest energies}",
    eprint = "2609.32649",
    archivePrefix = "arXiv",
    primaryClass = "astro-ph.HE",
    month = "9",
    year = "2026"
}

InspireHEP record: Fedynitch:2026ugq

This page and the Explorer both read webapp/citations.json; all BibTeX records are verbatim from InspireHEP.

Citing a specific parameter set, or one of the models GSF is compared with? The model version table lists the reference for every version, and the solar-modulation potentials carry their own.

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