Positional reference stars in the Magellanic Clouds

Details Positional reference stars in the Magellanic Clouds Positional reference stars in the Magellanic Clouds

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...90....1p&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 90, no. 1, Oct. 1991, p. 1-17.

Astronomy and Astrophysics

Astrophysics

3

Astrometry, Astronomical Coordinates, Magellanic Clouds, Reference Stars, Accuracy, Astronomical Catalogs, Astronomical Photography, Position (Location), Schmidt Telescopes

Scientific paper

The equatorial coordinates are determined of 926 stars (mainly of galactic origin) in the direction of the Magellanic Clouds at the mean epoch T = 1978.4 with an overall accuracy characterized by the mean values of the O-C coordinates, Sa = 0.35 arcsec and Sd = 0.38 arcsec, calculated from the coordinates of the Perth reference stars. These values are larger than the accuracy expected for primary standard stars. They allow the new positions to be considered as those of reliable secondary standard stars. The published positions correspond to an unquestionable improvement of the quality of the coordinates provided in the current catalogs. This study represents an 'astrometric step' in the starting of a 'Durchmusterung' of the Magellanic Clouds organized by de Boer (1988, 1989).

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