A ground-based proper motion study of twelve nearby Globular Clusters

W. N a r l o c h, J. K a l u z n y, R. P o l e s k i, M. R o z y c z k a, W. P y c h, and I. B. T h o m p s o n
Abstract: We derive relative proper motions of stars in the fields of the globular clusters M12, NGC 6362, M4, M55, M22, NGC 6752, NGC 3201, M30, M10, NGC 362, M5, and 47 Tucanae based on data collected between 1997 and 2015 with the 1-m Swope telescope of Las Campanas Observatory. We determine membership class and membership probability for over 446 000 objects, and show that these are efficient methods for separating field stars from members of the cluster. In particular, membership probabilities of variable stars and blue/yellow/red stragglers are determined. Finally, we find absolute proper motions for six globular clusters from our sample: M55, NGC 3201, M10, NGC 362, M5, and 47 Tuc. An electronic catalogue of the derived proper motions is publicly available via the internet.

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The paper (PDF) A ground-based proper motion study of tweleve nearby Globular Clusters
W. N a r l o c h, J. K a l u z n y, R. P o l e s k i, M. R o z y c z k a, W. P y c h, and I. B. T h o m p s o n
Description of the tables
The data The reference image (FITS)
M12
NGC6362
M4
M55
M22
NGC6752
NGC3201
M30
M10
NGC362
M5
47TucE
47TucW