UCAC3: ASTROMETRIC REDUCTIONS

@article{Finch2010UCAC3AR,
  title={UCAC3: ASTROMETRIC REDUCTIONS},
  author={Charlie T. Finch and Norbert Zacharias and Gary L. Wycoff},
  journal={The Astronomical Journal},
  year={2010},
  volume={139},
  pages={2200-2207}
}
Presented here are the details of the astrometric reductions from the x, y data to mean right ascension (R.A.), declination (decl.) coordinates of the third U.S. Naval Observatory CCD Astrograph Catalog (UCAC3). For these new reductions we used over 216,000 CCD exposures. The Two-Micron All-Sky Survey (2MASS) data are used extensively to probe for coordinate and coma-like systematic errors in UCAC data mainly caused by the poor charge transfer efficiency of the 4K CCD. Errors up to about 200… Expand

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