Table 5: The standard deviations of the radial velocities corresponding to the $N_{\rm e}$ different exposures of the $N_{\rm s} = 5$ suitable standard stars for all combinations of the different object exposures and suitable standard stars of the stars HD 24970 (A0; cf. Table 4; top part) and HD 23268 (A0; bottom part). The distance-weighted mean radial velocities with their errors are listed in the final column (in km s-1); time-averaged values, denoted $\overline {v}_{\rm rad}$, are provided in Table 3. The quantity $\sigma _{\rm r}$ denotes the repeatability error (Sect. 4.3).
HD 10982 196724 196821 27638 58142 $v_{\rm rad}$
SpT B9V A0V A0III B9V A1V  
d= 1.00 0.00 1.00 1.00 1.00  
w= 0.50 1.00 0.50 0.50 0.50  
N= 2 5 3 2 4  
$\sigma_{\rm r}=$ 3.4 2.3 0.9 0.2 2.0  
Exposure 1* 1.8 3.4 0.4 0.2 2.7 $+25.3 \pm 3.3$
Exposure 2 2.3 3.5 0.9 0.6 2.7 $+23.2 \pm 3.5$
Exposure 3 2.3 3.5 0.9 0.7 2.6 $+21.0 \pm 3.5$
Exposure 1 2.1 3.5 0.8 0.1 2.6 $+3.8 \pm 3.6$
Exposure 2 2.2 3.5 1.0 0.6 2.6 $+3.7 \pm 3.6$
Exposure 3 2.3 3.6 1.0 0.6 2.6 $+4.8 \pm 3.6$


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