An estimation of the<i>Gaia</i>EDR3 parallax bias from stellar clusters and Magellanic Clouds data

Context. The early-third Gaia data release (EDR3) parallaxes constitute the most detailed and accurate dataset that currently can be used to determine stellar distances in solar neighborhood. Nevertheless, there is still room for improvement their calibration systematic effects further reduced some circumstances. Aims. aim of this paper an improved EDR3 parallax bias as a function magnitude, color, ecliptic latitude using single method applied stars open clusters, globular Large Magellanic Cloud, Small Cloud. Methods. I study behavior residuals or differences between individual (stellar) group parallaxes, which are assumed constant corresponding cluster galaxy. This was done by first applying Lindegren et al. (2021b, A&amp;A, 649, A4) zero point then calculating new from analysis. Results. shows very small magnitude G &gt; 13 but significant ones brighter stars, especially blue ones. reduces those residuals, 9.2 &lt; range. k factor convert catalog uncertainties external (1.1–1.7) 11 13, intermediate (1.7–2.0) large (&gt;2.0) 9.2. Therefore, corrections needed calculate distance stars. There if future analyses add information additional red with also calculated RUWE values 1.4 8.0 six-parameter solutions, allowing correct estiimation uncertainties.