Journal Article

The XPM catalogue as a realization of the ICRS in optical and near-infrared ranges of wavelengths

P. N. Fedorov, V. S. Akhmetov, V. V. Bobylev and G. A. Gontcharov

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 415, issue 1, pages 665-672
Published in print July 2011 | ISSN: 0035-8711
Published online July 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.18738.x
The XPM catalogue as a realization of the ICRS in optical and near-infrared ranges of wavelengths

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The final version of the XPM catalogue, created by the authors, contains about 314 million stellar positions and absolute proper motions and covers the whole celestial sphere without gaps in the magnitude range 10m < B < 22m. The analysis of stellar positions and proper motions of the XPM catalogue is presented. The coordinate axes, defined by the XPM catalogue, were shown to have an ambiguity of rotation relative to the LQAC quasars and ICRF2 sources less than 0.2 mas yr−1. It is concluded that the XPM catalogue is the independent realization of the ICRS in the optical and near-infrared wavelengths in the sense of obtaining of proper motions. The absolute proper motions of XPM stars were compared with the similar data from the HCRF modern catalogues. The proper motions of stars in these catalogues were shown to have the appreciable random and systematic errors.

Keywords: catalogues; astrometry; reference systems

Journal Article.  4815 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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