**Table 8:** The radio values characterize the compact core at 5 GHz as discussed in Sect. 3.4. The turn-over properties are mean values of the model fits in Table 7. The cut-off frequency $\nu _2$ of the synchrotron spectrum is extrapolated from the optical-radio spectrum. The right column gives the calculated values.
Radio	X-ray	Results
$S_{\rm m}@\nu _{\rm m};~\nu_2$	$\alpha_{\rm X}^{(1~{\rm keV};5~{\rm keV})}~^{a}$	Doppler factor
$300\pm 15$ mJy@5 GHz; 2 THz	$-0.5\pm 0.2$	$\delta =0.5_{-0.3}^{+1.8}$
$\theta ^{\rm circ}_{\rm m}$	$S_{\rm obs}^{\rm X}(1~{\rm keV})~ ^{a}$	Magnetic field B₀
$(0.9\pm0.45)~{\rm mas}$	$0.1~{\rm\mu Jy}$	$(\rm0.15^{+0.2}_{-0.12})$ G

^a From Fiore et al. (2001; 5 keV) and Brinkmann et al. (1997; 1 keV).

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