Investigation of USNO-A2.0 Catalog Positions

Details Investigation of USNO-A2.0 Catalog Positions Investigation of USNO-A2.0 Catalog Positions

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...552..380a&link_type=abstract

The Astrophysical Journal, Volume 552, Issue 1, pp. 380-385.

Astronomy and Astrophysics

Astronomy

30

Astrometry, Catalogs, Reference Systems

Scientific paper

We present an investigation of the USNO-A2.0 Catalog positions. We have compared USNO-A2.0 positions with the Astrographic Catalogue-Tycho, with improved HST Guide Star Catalog positions in the ACT frame, and with International Celestial Reference Frame source positions and observational data from Valinhos CCD Meridian Circle, covering all the USNO-A2.0 magnitude range within 7<=V<=22. We report striking, peculiar features first found for the USNO-A2.0 catalog positions, which are different for its northern and southern parts.

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