353 citations · 381 across the 3 of their papers we have counts for
3 papers
astro-ph.IM2010★ 353 cited
The Third US Naval Observatory CCD Astrograph Catalog (UCAC3)
N. Zacharias, C. Finch, T. Girard +27
The third US Naval Observatory (USNO) CCD Astrograph Catalog, UCAC3 was released at the IAU General Assembly on 2009 August 10. It is the first all-sky release in this series and c…
astro-ph2008★ 13 cited
The StarScan plate measuring machine: overview and calibrations
Norbert Zacharias, Lars Winter, Ellis Holdenried +3
The StarScan machine at the U.S. Naval Observatory (USNO) completed measuring photographic astrograph plates to allow determination of proper motions for the USNO CCD Astrograph Ca…
astro-ph1995★ 15 cited
A Radio--Optical Reference Frame VIII. CCD observations from KPNO and CTIO: internal calibration and first results
N. Zacharias, C. de Vegt, L. Winter +1
In this pilot investigation, precise optical positions in the FK5 system are presented for a set of 16 compact extragalactic radio sources, which will be part of the future radio--…