Image Details
Caption: Figure 5.
Two-dimensional distribution of astrometric residuals (ΔR.A. versus Δdecl.) for one typical image, with points color coded by DDO51 magnitude. The top and right panels show the one-dimensional histograms of ΔR.A. and Δdecl., with the quoted σ values marking the dispersion of each component.
© 2026. The Author(s). Published by the American Astronomical Society.