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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…
Identification of 1.4 Million AGNs in the Mid-Infrared using WISE Data
Nathan Secrest, Rachel Dudik, Bryan Dorland +5
We present an all-sky sample of ~ 1.4 million AGNs meeting a two color infrared photometric selection criteria for AGNs as applied to sources from the Wide-Field Infrared Survey Ex…
UrHip Proper Motion Catalog
Julien Frouard, Bryan N. Dorland, Valeri V. Makarov +2
Proper motions are computed and collected in a catalog using the Hipparcos positions (epoch 1991.25) and URAT1 positions (epoch 2012.3 to 2014.6). The goal is to obtain a significa…
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…