Direction of Parsec-Scales Jets for 9220 Active Galactic Nuclei
  The direction of parsec-scale jets in active galactic nuclei (AGNs) is
essential information for many astrophysical and astrometric studies, including
linear polarization and magnetic field structure, frequency-dependent
synchrotron opacity, proper motion, and reference frame alignment. We developed
a rigorous, simple, and completely automated method to measure the directions
from calibrated interferometric visibility data at frequencies ranging from 1.4
GHz to 86 GHz. We publish the results for 9220 AGNs with the typical accuracy
below 10 degrees. An internal check of the method comparing the directions
between different observing frequencies as well as with previous publications
verifies the robustness of the measured values.
