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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

Cite the GSF 2025 proceedings until the GSF 2026 paper has an InspireHEP record; this page and the Explorer will switch over together.

@article{Dembinski:2025nmp,
    author = "Dembinski, Hans and Engel, Ralph Richard and Fedynitch, Anatoli and Fujisue, Kozo",
    title = "{Global Spline Fit GSF-2025 - An update of the data-driven model of the cosmic-ray flux and its mass composition}",
    doi = "10.22323/1.501.0248",
    journal = "PoS",
    volume = "ICRC2025",
    pages = "248",
    year = "2025"
}

InspireHEP record: Dembinski:2025nmp

The GSF 2026 paper is in preparation; this page and the Explorer both read webapp/citations.json and will switch to the 2026 record the moment it exists.

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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