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The Fundamental Reference AGN Monitoring Experiment (FRAMEx)
B. Dorland, N. Secrest, M. Johnson +6
The U.S. Naval Observatory (USNO), in collaboration with Paris Observatory (OP), is conducting the Fundamental Reference AGN Monitoring Experiment, or FRAMEx. FRAMEx will use USNO'…
UCAC5: New Proper Motions using Gaia DR1
Norbert Zacharias, Charlie Finch, Julien Frouard
New astrometric reductions of the US Naval Observatory CCD Astrograph Catalog (UCAC) all-sky observations were performed from first principles using the TGAS stars in the 8 to 11 m…
URAT Parallax Catalog (UPC)
Charlie Finch, Norbert Zacharias
The URAT Parallax Catalog (UPC) consists of 112,177 parallaxes. The catalog utilizes all Northern Hemisphere exposures from the United States Naval Observatory (USNO) Robotic Astro…
IAU Commission 8 Astrometry Transactions Report 2012-2015
Norbert Zacharias
Commission 8 has regularly published triennial reports in the past and the current OC therefore voted to adopt a traditional format also for this special Legacy issue of the IAU Tr…
Bright Star Astrometry with URAT
Norbert Zacharias
The U.S. Naval Observatory Robotic Astrometric Telescope (URAT) is observing the northern sky since April 2012 for an astrometric survey. Multiple overlaps per year are performed i…
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…