The HST large programme on omega Centauri -- IV. catalogue of two external fields

TL;DR

This paper provides a comprehensive, publicly available catalog and atlases for two external fields of omega Centauri observed with Hubble, including proper motions and membership probabilities derived from multi-epoch imaging.

Contribution

It introduces a detailed catalog and atlases for two new fields around omega Centauri, with proper motion data enabling star membership analysis.

Findings

Catalog includes stars with proper motions and membership probabilities.

Fields are located 12 arcminutes from the cluster center.

Data covers ultraviolet to infrared wavelengths.

Abstract

In the fourth paper of this series, we present -- and publicly release -- the state-of-the-art catalogue and atlases for the two remaining parallel fields observed with the Hubble Space Telescope for the large programme on omega Centauri. These two fields are located at ~12' from the centre of the globular cluster (in the West and South-West directions) and were imaged in filters from the ultraviolet to the infrared. Both fields were observed at two epochs separated by about 2 years that were used to derive proper motions and to compute membership probabilities.