Last update: 2018.02.19 by Wojtek Pych
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A proper motion study of the globular clusters M4, M12, M22, NGC 3201, NGC 6362 and NGC 6752

K. Zloczewski, J. Kaluzny, M. Rozyczka, W. Krzeminski, B. Mazur, and I. B. Thompson

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.

DOWNLOADS:
The paper (PDF) "A proper motion study of the globular clusters M4, M12, M22, NGC 3201, NGC 6362 and NGC 6752"
Zloczewski, K.; Kaluzny, J.; Rozyczka, M.; Krzeminski, W.; Mazur, B.; and Thompson, I. B., 2012, Acta Astronomica, vol 62, no 4, p. 357-375
Description of the tables ReadMe
The data The reference image (FITS)
M4
M12
M22
NGC3201
NGC6362
NGC6752