We produce a new photometric calibration for the combined six-filter system formed by Gaia DR2 + EDR3 G+GBP+GRP using an improved STIS/HST spectrophotometric library with very red stars. The comparison between observed and synthetic photometry yields residual dispersions of just 3.4-8.7 mmag, resulting in the most accurate and precise whole-sky large-dynamic-range optical photometric system ever obtained. We include some tests and applications.
@article{arxiv.2407.21388,
title = {Differences between Gaia DR2 and Gaia EDR3 photometry: demonstration, consequences, and applications},
author = {J. Maíz Apellániz and M. Weiler},
journal= {arXiv preprint arXiv:2407.21388},
year = {2024}
}
Comments
To appear in Highlights of Spanish Astrophysics XIII, P253, version with adapted style file