ASTRA: A Python Package for Cross-Instrument Stellar and Telluric Template Construction

The Journal of Open Source Software 2026 Open access

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Authors: A. M. Silva, J. P. Faria, Nuno C. Santos, S. G. Sousa, Pedro T. P. Viana, J. H. C. Martins
DOI: 10.21105/joss.09413
Cited by: 2
References: 12

Abstract

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.

Fields of Study & Subjects

Stellar planetary and galactic studies Astronomy and Astrophysical Research Astrophysics and Star Formation Studies

Publication details

Journal / source
The Journal of Open Source Software
Publisher
The Open Journal
Volume
11
Issue
117
Pages
9413–9413
Publication date
13 January 2026