353 citations · 795 across the 11 of their papers we have counts for
12 papers
Correlated and zonal errors of global astrometric missions: a spherical harmonic solution
V. V. Makarov, B. N. Dorland, R. A. Gaume +4
We propose a computer-efficient and accurate method of estimation of spatially correlated errors in astrometric positions, parallaxes and proper motions obtained by space and groun…
Quasometry, Its Use and Purpose
Valeri Makarov, Ciprian Berghea, David Boboltz +8
Quasometry is precision measurement of celestial positions and apparent motion of very distant extragalactic objects, such as quasars, galactic nuclei, and QSOs. We use this term t…
TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry I. First-Epoch 8.4 GHz Images
Roopesh Ojha, Matthias Kadler, Moritz Böck +24
We introduce the TANAMI program (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry) which is monitoring an initial sample of 43 extragalactic jets located…
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…
TANAMI: Milliarcsecond Resolution Observations of Extragalactic Gamma-ray Sources
Roopesh Ojha, M. Kadler, M. Böck +24
The TANAMI (Tracking AGN with Austral Milliarcsecond Interferometry) and associated programs provide comprehensive radio monitoring of extragalactic gamma-ray sources south of decl…
Photometric observations of selected, optically bright quasars for Space Interferometry Mission and other future celestial reference frames
Roopesh Ojha, Norbert Zacharias, Gregory S. Hennessey +2
Photometric observations of 235 extragalactic objects that are potential targets for the Space Interferometry Mission (SIM) are presented. Mean B, V, R, I magnitudes at the 5% leve…