ASTRA is a Python package that provides a modular, instrument-independent interface for working with high-resolution stellar spectra. Designed to support data from multiple spectrographs, including ESPRESSO (Pepe et al., 2021), HARPS (Mayor et al., 2003; Pepe et al., 2002), MAROON-X (Seifahrt et al., 2022), and CARMENES (Quirrenbach et al., 2014). ASTRA offers a unified abstraction over their data formats, enabling consistent access to fluxes, wavelengths, uncertainties, and metadata across instruments. Furthermore, it applies the necessary wavelength and flux calibrations that are needed, as described by the official pipelines of each instrument.
@article{arxiv.2601.10439,
title = {ASTRA: A Python Package for Cross-Instrument Stellar and Telluric Template Construction},
author = {André M. Silva and J. P. Faria and N. C. Santos and S. G. Sousa and P. T. P. Viana and J. H. C. Martins},
journal= {arXiv preprint arXiv:2601.10439},
year = {2026}
}
Comments
4 pages, published in the Journal of Open Source Software; all code available at https://github.com/Kamuish/ASTRA