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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 Internet.
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