4 citations · 6 across the 3 of their papers we have counts for
3 papers
astro-ph.IM2026★ 1 cited
Astrometric properties of reference frame sources as a function of redshift
Zhiyun Zhang, N. Liu, Xiaxuan Zhang +8
Previous studies based on the latest realisation of the International Celestial Reference Frame (ICRF3) have suggested a correlation between astrometric properties (such as the rad…
astro-ph.IM2017★ 4 cited
Overall properties of the Gaia DR1 reference frame
N. Liu, Z. Zhu, J. -C. Liu +1
We compare quasar positions of the auxiliary quasar solution with ICRF2 sources using different samples and evaluate the influence on the {\it Gaia} DR1 reference frame owing to th…
astro-ph.GA2016★ 1 cited
Test of source selection for constructing a more stable and uniform celestial reference frame
N. Liu, J. -C. Liu, Z. Zhu
We aim to evaluate the possibility of improving the ICRS realization starting from the ICRF2 catalogue by investigating the coordinate time series of radio sources observed by VLBI…