Table 2: The intrinsic magnetic field strength of total $B_{\rm {tot}}$ and regular  $B_{\rm {reg}}$ components as well as the field regularity in different regions of NGC 4254, denoted in Fig. 5 (top-right). The given uncertainties express random noise in the maps used. The errors, including possible systematic uncertainties due to applied assumptions, can reach 25% of the values obtained. The presented magnetic fields strengths are taken directly from magnetic maps described in Sect. 2.3.
  $B_{\rm {tot}}$ $B_{\rm {reg}}$ ${B_{{\rm reg}}}/{B_{{\rm ran}}}$
  [$\mu $G] [$\mu $G]  
Total $16\pm1$ $7 \pm 0.2$ n.a.
1) Southern outer magnetic arm $19.7 \pm 0.5$ $12.6 \pm 0.3$ $0.83 \pm 0.03$
2) Western outer magnetic arm $18.9 \pm 0.8$ $12.3 \pm 0.4$ $0.86 \pm 0.09$
3) Northern inner magnetic arm $16.9 \pm 0.2$ $ 7.8 \pm 0.3$ $0.52 \pm 0.02$
4) Central part $24.3 \pm 0.5$ $ 4.8 \pm 0.7$ $0.20 \pm 0.03$
5) SW optical spiral arm $22.2 \pm 0.3$ $ 7.4 \pm 0.2$ $0.35 \pm 0.02$
6) NE optical spiral arm $20.3 \pm 0.7$ $ 6.5 \pm 0.8$ $0.34 \pm 0.05$


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