Double Stars in the UCAC3 Catalog

Details Double Stars in the UCAC3 Catalog Double Stars in the UCAC3 Catalog

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541924h&link_type=abstract

American Astronomical Society, AAS Meeting #215, #419.24; Bulletin of the American Astronomical Society, Vol. 42, p.280

Astronomy and Astrophysics

Astronomy

Scientific paper

The astrometric standard for stellar positions in its magnitude range, the UCAC3 Catalog is the first full-sky realization of the UCAC project. Previous releases of the UCAC were not all-sky catalogs, and also lacked astrometric solutions for entries whose image profiles were not circularly symmetric due to the presence of "close" double stars.
Pairs identified as double for UCAC3 were examined by the secondary USNO speckle camera mounted on the 26-inch telescope in Washington. While the magnitude limit of the secondary camera restricted our observing sample, the separation regime of pairs detectable by the USNO Astrograph was in the sweet spot" of detection space for the secondary speckle camera.
We present the results of these observations and an investigation of UCAC3 false positives, as well as a summary of UCAC measures of known WDS pairs.

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