308 citations · 1.2k across the 27 of their papers we have counts for
28 papers
On More than Two Decades of Celestial Reference Frame VLBI Observations in the Deep South: IVS-CRDS (1995-2021)
S. Weston, A. de Witt, Hana Krasna +13
The International VLBI Service for Geodesy & Astrometry (IVS) regularly provides high-quality data to produce Earth Orientation Parameters (EOP), and for the maintenance and realiz…
The third realization of the International Celestial Reference Frame by very long baseline interferometry
P. Charlot, C. S. Jacobs, D. Gordon +17
A new realization of the International Celestial Reference Frame (ICRF) is presented based on the work achieved by a working group of the International Astronomical Union (IAU) man…
The Next Generation Celestial Reference Frame
Megan Johnson, Frank Schinzel, Jeremy Darling +10
Astrometry, the measurement of positions and motions of the stars, is one of the oldest disciplines in Astronomy, extending back at least as far as Hipparchus' discovery of the pre…
The precious set of radio-optical reference frame objects in the light of Gaia DR2 data
Valeri V. Makarov, Ciprian T. Berghea, Julien Frouard +2
We investigate a sample of 3412 {\it International Celestial Reference Frame} (ICRF3) extragalactic radio-loud sources with accurate positions determined by VLBI in the S/X band, m…
Towards the ICRF3: astrometric comparison of the USNO 2016A VLBI solution with ICRF2 and Gaia DR1
Julien Frouard, Megan C. Johnson, Alan Fey +2
The VLBI USNO 2016A (U16A) solution is part of a work-in-progress effort by USNO towards the preparation of the ICRF3. Most of the astrometric improvement with respect to the ICRF2…
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…