Gnuastro: Estimating the Zero Point Magnitude in Astronomical Imaging
Abstract
Calibration of pixel values is a fundamental step for accurate measurements in astronomical imaging. In astronomical jargon this is known as estimating zero point magnitude. Here, we introduce a newly added script in GNU Astronomy Utilities (Gnuastro) version 0.20 for the zero point magnitude estimation, named: astscript-zeropoint. The script offers numerous features, such as the flexibility to use either image(s) or a catalog as the reference dataset. Additionally, steps are parallelized to enhance efficiency for big data. Thanks to Gnuastro's minimal dependencies, the script is both flexible and portable. The figures of this research note are reproducible with Maneage, on the Git commit c89275e.
Cite
@article{arxiv.2312.04263,
title = {Gnuastro: Estimating the Zero Point Magnitude in Astronomical Imaging},
author = {Sepideh Eskandarlou and Mohammad Akhlaghi and Raúl Infante-Sainz and Elham Saremi and Samane Raji and Zahra Sharbaf and Giulia Golini and Zohreh Ghaffari and Johan H. Knapen},
journal= {arXiv preprint arXiv:2312.04263},
year = {2023}
}
Comments
Supplementary data on Zenodo (https://doi.org/10.5281/zenodo.10256845), project source on Codeberg (https://codeberg.org/gnuastro/papers/src/branch/zeropoint) and archived on Software Heritage (swh:1:dir:8b2d1f63be96de3de03aa3e2bb68fa7fa52df56f; see text for usage)