**Table 5:** Fit parameters for the spectral model HIGHECUT, Model A in Table 4. In the last line the fit parameters for the second phase interval are given for the same model, but multiplied by a cyclotron absorption^a. The uncertainties given are at 90% confidence level for single parameter errors ( $\chi ^2_{\rm min} + 2.7$ ). No systematic errors were considered.
$\begin{displaymath}\begin{tabular}{r @{--} l c c c c c c c} \hline \hline\noali... ...}^{+1.9}$ & $\rm 19.1_{-0.3}^{+0.5}$ \\ \hline \end{tabular}\end{displaymath}$ ^a The cyclotron line parameters (XSPEC model `cyclabs`) were: energy 49.3 keV, width 5.4 keV, depth 0.136. These parameters were fixed after fitting them to a spectral range of 20-60 keV, so that for the fit parameters shown in the last line also a d.o.f. value of 68 is valid.

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