VizieR Online Data Catalog: Absolute motions of the Arches and Quintuplet (Hosek+, 2022)

Stellar proper motions are measured using four epochs of HST/WFC3-IR observations of both clusters taken between 2010 - 2016 (GO-11671, PI Ghez; GO-12318, PI Ghez; GO-12667, PI Ghez; GO-14613, PI Lu). Astrometry is extracted in the F153M filter and is transformed into the Gaia DR3 reference frame using stars in common with the Gaia EDR3 catalog. F127M and F139M observations were obtained in 2010 provide additional stellar photometry. All photometric measurements are reported in Vega magnitudes.

A cluster membership probability is calculated for each star based on the Gaussian Mixture Model derived to describe the proper motion distributions of the cluster and field star populations. Details can be found in Appendix B of the paper.

(2 data files).