The HST large programme on ω Centauri - IV. Catalogue of two external fields
Salaris, M.; Apai, D.; Anderson, J.; Rosati, P.; Bedin, L. R.; Nardiello, D.; Vesperini, E.; Burgasser, A. J.; Bellini, A.; Scalco, M.; Libralato, M.; Gerasimov, R.
Italy, United States, United Kingdom, France
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 ω Centauri. These two fields are located at ~12 arcmin 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 yr that were used to derive proper motions and to compute membership probabilities.