Accurate equatorial positions for the centers of six X-ray globular clusters

Details Accurate equatorial positions for the centers of six X-ray globular clusters Accurate equatorial positions for the centers of six X-ray globular clusters

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239l..61s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 239, July 15, 1980, p. L61-L63.

Astronomy and Astrophysics

Astrophysics

14

Galactic Structure, Globular Clusters, X Ray Sources, Astronomical Coordinates, Astronomical Photography, Photographic Plates, Position (Location)

Scientific paper

The central positions of the blue photographic image of six X-ray globular clusters, NGC 1851, 6440, 6441, 6624, 6712, and 7078 (M 15), have been determined in the equatorial coordinate system to an accuracy on the order of + or - 1 arcmin. This two-orders-of-magnitude improvement in cluster central positions is a by-product of a larger program to determine axial ratios and orientations for 120 galactic globular clusters.

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