\begin{table}%t2
\caption{\label{table:spectra}Parameters of the spectral fit of Cyg X-1. $\chi^2_{\rm r}$ is
the reduced chi square, the uncertainties are at 90\% confidence level and include a 5\% systematic error.}                  
%\centering
  \small                        
\begin{tabular}{c c c c c}       
\hline\hline \noalign{\smallskip}                 
%& & & & \\
Normalized rate & Photon index & Flux & $\chi^2_{\rm r}$ & Degrees of freedom \\    
$[{\rm cts \; cm^{-2} \; s^{-1}}]$ & & $[{\rm erg \; cm^{-2} \; s^{-1}}]$ & &\\
\hline \noalign{\smallskip}                       
$0.12$ & $\rm 1.63^{+0.09}_{-0.08}$ & $(7.6 \pm 0.3) \times 10^{-9}$ & 1.159 & 31 \\
$0.17$ & $1.60 \pm 0.11$ & $(8.3 \pm 0.4) \times 10^{-9}$ & 1.113 & 32\\
$0.08$ & $1.74 \pm 0.09$ & $(4.6 \pm 0.4) \times 10^{-9}$ & 0.986 & 29 \\
\hline                                   
\end{tabular}
\end{table}