Table 8: The variability parameters of B 2005+403 and the secondary calibrators at 1.67 GHz ( top) and 4.85 GHz ( bottom). Column 2 shows the mean flux density in Jy, Col. 3 its standard deviation, Col. 4 the modulation index, Col. 5 the noise-bias corrected variability amplitude and Col. 6 the reduced $\chi ^2$ .
Source name $\langle S\rangle {\rm ~(Jy)}$ $\sigma$ ${m (\%)}$ ${Y (\%)}$ ${\rm red.} \chi^2$

$\lambda=18$ cm, m₀=0.25%

B 2005+403 2.430 0.024 1.01 2.93 5.593

NGC 7027 1.906 0.004 0.19 0 0.197

B 2021+614 2.193 0.006 0.25 0 0.365

$\lambda=6$ cm, m₀=0.20%

B 2005+403 2.905 0.013 0.45 1.18 3.107

NGC 7027 5.489 0.011 0.20 0 0.621

**Table 8:** The variability parameters of B 2005+403 and the secondary calibrators at 1.67 GHz ( *top*) and 4.85 GHz ( *bottom*). Column 2 shows the mean flux density in Jy, Col. 3 its standard deviation, Col. 4 the modulation index, Col. 5 the noise-bias corrected variability amplitude and Col. 6 the reduced $\chi ^2$ .
Source name	$\langle S\rangle {\rm ~(Jy)}$	$\sigma$	${m (\%)}$	${Y (\%)}$	${\rm red.} \chi^2$
$\lambda=18$ cm, m₀=0.25%
B 2005+403	2.430	0.024	1.01	2.93	5.593
NGC 7027	1.906	0.004	0.19	0	0.197
B 2021+614	2.193	0.006	0.25	0	0.365
$\lambda=6$ cm, m₀=0.20%
B 2005+403	2.905	0.013	0.45	1.18	3.107
NGC 7027	5.489	0.011	0.20	0	0.621

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