Absolute proper motions and the colour-magnitude diagram of the globular cluster NGC 4147

Details Absolute proper motions and the colour-magnitude diagram of the globular cluster NGC 4147 Absolute proper motions and the colour-magnitude diagram of the globular cluster NGC 4147

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998cha%26a..22..352w&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 22, Issue 3, p. 352-360.

Astronomy and Astrophysics

Astrophysics

Scientific paper

Astrometry and photometry of 115 stars down to B=17.6 in a 11' × 11' region around NGC 4147 were made. The astrometry was based on three plates taken at Shanghai in 1958, four CCD frames taken at Kavalur, India, in 1996, and some data given by Brosche et al. in 1985. The central overlap principle was used in the reduction. The membership probabilities of the stars were calculated using the proper motions obtained. Colour-magnitude diagrams were constructed using the CCD photometry of the Vainu Bappu Telescope. An absolute proper motion of -2.82 +/- 0.49 mas/yr in right ascension and 2.37 +/- 0.43 mas/yr in declination was obtained for the cluster.

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