**Table 1:** Least squares fits to the magnetic field strength B, the optical depth normalization coefficient ${\cal T}_{\rm norm}$ , the scattering probability $c_{\rm sc}$ , the temperature of the isothermal CN layer $T_{\rm eff}$ and cosine of the heliocentic angle $\mu$ in three considered regions of spectrum
Region	B, [G]	${\cal T}_{\rm norm}$	$c_{\rm cs}$	$T_{\rm eff},$ K	$\mu$
1	$27\pm 5$	2.0	0.375	4620	0.1
2	$25 \pm 5$	3.5	0.240	4620	0.12
3	$11\pm2$	2.3	0.142	4460	0.11

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