A proper motion study of the globular clusters M4, M12, M22, NGC 3201, NGC 6362 and NGC 6752

K. Z l o c z e w s k i, J. K a l u z n y, M. R o z y c z k a, W. K r z e m i n s k i, B. M a z u r, and I. B. T h o m p s o n
Abstract: We derive relative proper motions of stars in the fields of globular clusters M4, M12, M22, NGC 3201, NGC 6362 and NGC 6752 based on a uniform data set collected between 1997 and 2008. We assign a membership class for each star with a measured proper motion, and show that these membership classes can be successfully used to eliminate field stars from color-magnitude diagrams of the clusters. They also allow for the efficient selection of rare objects such as blue/yellow/red stragglers and stars from the asymptotic giant branch. Tables with proper motions and photometry of over 87000 stars are made publicly available via the Internet.

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The paper (PDF) A proper motion study of the globular clusters M4, M12, M22, NGC 3201, NGC 6362 and NGC 6752
K. Z l o c z e w s k i, J. K a l u z n y, M. R o z y c z k a, W. K r z e m i n s k i, B. M a z u r, and I. B. T h o m p s o n
Description of the tables
The data The reference image (FITS)
M4
M12
M22
NGC3201
NGC6362
NGC6752