Table 2: $\Delta \mu $ binary parameters with the old and new Hipparcos data reduction.
Quantity Old red. New red.
$\Delta \mu _{{\rm FH},\alpha}$ [mas/yr] $1.70 \pm 1.08$ $0.43 \pm 0.50$
$\Delta \mu _{{\rm FH},\delta}$ [mas/yr] $3.31 \pm 1.05$ $1.80 \pm 0.56$
$F_{\rm FH}$ 3.26 3.40
$\Delta \mu _{{\rm0H},\alpha}$ [mas/yr] $1.76 \pm 1.02$ $0.49 \pm 0.37$
$\Delta \mu _{{\rm0H},\delta}$ [mas/yr] $2.49 \pm 0.96$ $0.98 \pm 0.35$
$F_{\rm0H}$ 2.78 3.28
$\Delta \mu _{{\rm0F},\alpha}$ [mas/yr] $0.06 \pm 0.54$ $0.06 \pm 0.54$
$\Delta \mu _{{\rm0F},\delta}$ [mas/yr] $-0.82 \pm 0.60$ $-0.82 \pm 0.60$
$F_{\rm0F}$ 1.39 1.39

$\Delta \mu _{{\rm0(GC)H},\alpha}$ [mas/yr]		 $1.40 \pm 1.03$ $0.13 \pm 0.39$
$\Delta \mu _{{\rm0(GC)H},\delta}$ [mas/yr] $3.82 \pm 0.96$ $2.31 \pm 0.38$
$F_{\rm0(GC)H}$ 3.96 6.22
 
Note: $\Delta \mu $ is the difference between different proper motion values identified by the indices, where ``F'' denotes FK5 proper motion, ``H'' denotes Hipparcos proper motion, and ``0'' the change in position over baseline for FK5 and Hipparcos. 0(GC) is the same as the latter, but for GC instead of FK5. $F_{\rm FH}$, $F_{\rm0H}$, $F_{\rm0F}$ and $F_{\rm0(GC)H}$ are the corresponding significance parameters, where $F_{\rm FH} = 3.44$ corresponds to a 99.7% significance.


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