Fig. 5
Residual plot after adjustment of the first two-degree VSH for the group “All”. Top left: the right ascension component of “ICRF2 −Gaia DR1”. Top right: the declination component of “ICRF2 −Gaia DR1”. Bottom left: the right ascension component of “gsf2016a −Gaia DR1”. Bottom right: the declination component of “gsf2016a −Gaia DR1”. Symbols show defining sources as blue circles and non-defining sources as red crosses.
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