Table 1: Best-fit spectral parameters for the phase-resolved spectroscopy of RX J0146.9+6121, in the case of the independent fit of the four spectra. Errors are at a 90% confidence level for a single interesting parameter. $N_{\rm H}$ and $kT_{\rm BB}$ are measured in units of 1021 cm-2 and keV, respectively.
Spectral Phase Interval
Parameter A B C D
$N_{\rm H}$ $\rm 4.8^{+0.4}_{-0.7}$ $\rm 5.4^{+0.4}_{-0.3}$ $\rm 5.0^{+0.8}_{-0.7}$ $\rm 3.6^{+0.6}_{-0.5}$
$\Gamma $ $\rm 1.47^{+0.19}_{-0.20}$ $\rm 1.39^{+0.09}_{-0.08}$ $\rm 1.31^{+0.35}_{-0.23}$ $\rm 1.06^{+0.11}_{-0.21}$
$kT_{\rm BB}$ $0\rm .98^{+0.08}_{-0.12}$ $\rm 1.05^{+0.10}_{-0.08}$ $\rm 1.34^{+0.17}_{-0.18}$ $\rm 1.21^{+0.21}_{-0.16}$
$f_{\rm TOT}^{a}$ 1.81 3.22 1.74 1.00
$f_{\rm PL}^{a}$ 1.34 2.52 1.10 0.70
  (74%) (78%) (63%) (70%)
$f_{\rm BB}^{a}$ 0.47 0.70 0.64 0.30
  (26%) (22%) (37%) (30%)
$\chi^{2}_{\nu}$/d.o.f. 0.972/308 1.021/992 1.085/352 1.131/328
a Unabsorbed flux in the energy range 0.3-10 keV,
in units of 10-11 erg cm-2 s-1.

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