Table 3: Phase-resolved spectral analysis. We used the CTT model. All continuum and normalisation parameters were left free. A few parameters were fixed as for the average spectrum (see Table 2): $N_{\textrm{\tiny H}}^{\textrm{\tiny gal}}=1.5\times10^{22}\ \textrm{cm}^{-2}$, $kT_{{\rm soft}}=0.5\ {\rm keV}$, $kT_{0}=0.1\ {\rm keV}$. Only pn data were used for the phase-resolved spectral analysis.
Parameters Low intensity Pulse wings Pulse core Unit
$C_{\textrm{\tiny ISGRI}}$ 2.6 1.4 0.9  
$F_{1-2 \textrm{\tiny keV}}$ 1.4 4.2 2.8 $10^{-14}\ \textrm{erg}~\textrm{cm}^{-2}~\textrm{s}^{-1}$
$N_{\textrm{\tiny H}}$ $\rm 15.2_{-2.2}^{+2.0}$ $\rm 13.7_{-2.6}^{+2.9}$ $\rm 15.1_{-1.8}^{+1.8}$ $10^{22}\ \textrm{cm}^{-2}$
$Z_{{\rm Fe}}$ $\rm 1.2_{-0.5}^{+0.6}$ $\rm 2.0_{-0.8}^{+1.2}$ $\rm 1.6_{-0.4}^{+0.5}$ $Z_{\odot}$
$kT_{\textrm{\tiny e}}$ $\rm 5.5_{-0.2}^{+0.2}$ $\rm 5.4_{-0.2}^{+0.2}$ $\rm 5.5_{-0.2}^{+0.2}$ keV
$\tau$ $\rm 8.0_{-0.8}^{+1.0}$ $\rm 8.7_{-1.2}^{+1.5}$ $\rm 7.8_{-0.7}^{+0.8}$  
$E_{\textrm{\tiny line}}$ $\rm 6.40_{-0.02}^{+0.01}$ $\rm 6.42_{-0.03}^{+0.04}$ $\rm 6.40_{-0.05}^{+0.04}$ keV
$F_{\textrm{\tiny line}}$ $\rm 2.2_{-0.3}^{+0.3}$ $\rm 1.6_{-0.6}^{+0.6}$ $\rm 1.4_{-0.6}^{+0.7}$ $10^{-4}\ \textrm{ph}~\textrm{cm}^{-2}~\textrm{s}^{-1}$
unabs $F_{2-12 \textrm{\tiny keV}}$ 1.2 2.0 3.4 $10^{-10}\ \textrm{erg}~\textrm{cm}^{-2}~\textrm{s}^{-1}$
$\chi ^{2}$/d.o.f. 145/160 208/217 180/197  


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