SpectResC: : Simple Spectral Resampling in C

This is a Python package written with C extension to provide significant performance gain on SpectRes, and some performance over the numba implementation:

We keep the implementation as close to SpectRes as possible. The speed test was performed with a single core of Intel(R) Xeon(R) Gold 6226R CPU @ 2.90GHz (Oct 2025) against SpectRes v2.2.2.

Installation

SpectResC can be installed using pip

pip install spectresc

Documentation

Please refer to the original SpectRes for the documentation.

Citation

If you have made use of SpectResC, please reference:

1. the original SpectRes arXiv article
2. the zenodo DOI for SpectResC