LFKit

LFKit is a modular Python toolkit for luminosity function modeling, photometric corrections, and related utilities for cosmological analyses.

It is designed to provide reusable building blocks for working with luminosity functions, magnitude conversions, k-corrections, e-corrections, and photometric response handling in a clear and extensible way.

Features

LFKit currently includes tools for:

• luminosity function modeling
• Schechter and evolving luminosity function utilities
• magnitude and luminosity conversions
• k-corrections and e-corrections
• photometric response and filter-related helpers
• interpolation, validation, and general utility functions

The package is intended to stay modular, so components can be used independently or combined into larger analysis pipelines.

Documentation

View the documentation

Installation

Install LFKit from PyPI:

python -m pip install py-lfkit

Clone the repository and install it locally:

git clone https://github.com/cosmology-kit/lfkit.git
cd lfkit
python -m pip install -e .

Citation

If you use LFKit in your research, please cite it.

@software{sarcevic2026lfkit,
  title   = {LFKit: Luminosity functions and photometric corrections toolkit},
  author  = {Šarčević, Nikolina},
  year    = {2026},
  version = {0.1.4},
  url     = {https://github.com/cosmology-kit/lfkit}
}

License

MIT License © 2025 Niko Šarčević, Matthijs van der Wild, and contributors.