Differences between Gaia DR2 and Gaia EDR3 photometry: demonstration, consequences, and applications

Abstract

We produce a new photometric calibration for the combined six-filter system formed by $Gaia$ DR2 + EDR3 $G$+$G_{\mathrm{BP}}$+$G_{\mathrm{RP}}$ 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.

To appear in Highlights of Spanish Astrophysics XIII, P253, version with adapted style file

Cited by in corpus (1)

• The Alma catalogue of OB stars. III. A cross-match with Gaia DR3 and an extension based on new spectral classifications