1.2k citations · 3.1k across the 42 of their papers we have counts for
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astro-ph.SR2014★ 23 cited
UCAC4 Nearby Star Survey: A Search for Our Stellar Neighbors
Charlie Finch, Norbert Zacharias, John Subasavage +2
We use data from the U.S. Naval Observatory fourth CCD Astrograph Catalog (UCAC4) in combination with photometry from the AAVSO Photometric All-Sky Survey (APASS) and Two Micron Al…
astro-ph.IM2014★ 27 cited
Radio-Optical Reference Frame Link Using the US Naval Observatory Astrograph and Deep CCD Imaging
Norbert Zacharias, Marion I. Zacharias
Between 1997 and 2004 several observing runs were conducted mainly with the CTIO 0.9 m to image ICRF counterparts (mostly QSOs) in order to determine accurate optical positions. Co…