\begin{table}%t1
    \caption{Fit results for different spectral models for the whole
      emission region within an integration radius of 0.8\degr\ around
      the best fit position and the background derived from
      off-data. The differential flux normalisation $I_0$ is given in
      units of $10^{-12} ~ {\rm cm}^{-2} ~ {\rm s}^{-1} ~
      {\rm TeV}^{-1}$. $E$, $E_{{\rm B}}$, and $E_{{\rm c}}$
      are given in units of TeV. The last column gives the integrated
      flux above the spectral analysis threshold of 270~GeV in units
      of $10^{-11}~ {\rm cm}^{-2} ~ {\rm s}^{-1}$. The
      power-law fit provides a rather poor description of the
      data. Thus fits of a power law with an exponential cutoff (row
      2), a power law with an energy dependent photon index (row~3),
      and a broken power law (row 4; in the formula, the parameter $S
      = 0.1$ describes the sharpness of the transition from $\Gamma_1$
      to $\Gamma_2$ and is fixed in the fit) are also given. Note that
      some of the fit parameters are highly correlated.
    \label{tab::fits}}
    %\centering
\par
    \begin{tabular}{l l l l l  l  l }
      \hline\hline
      \noalign{\smallskip}
      Fit formula for $\frac{{\rm d} N}{{\rm d} E}$& 
      \multicolumn{3}{c}{Fit parameters}  & & $\chi^2$~(ndf) &
      Flux$_{> 270~{\rm GeV}}$\\
\noalign{\smallskip}
            \hline
            \noalign{\smallskip}
      $\displaystyle{I_0\ E ^ {-\Gamma}}$ & $I_0 = 19.8 
      \pm 0.4$ & $\Gamma = 2.38 \pm 0.02$ & & &
      40.4 (15) & $87.4 \pm 2.0$ \\
      $\displaystyle{I_0\ E ^ {-\Gamma}\ \exp (-E / E_{{\rm c}})}$ & $I_0 = 21.0
      \pm 0.5$ & $\Gamma = 2.26 \pm 0.03$ & $E_{{\rm c}} = 24.8 \pm
      7.2 $ & & 16.9 (14) & $86.7 \pm 2.5$\\
      $\displaystyle{I_0\ E ^ {-\Gamma + ~ \beta\ \log E}}$ & $I_0 = 21.0
      \pm 0.4$ & $\Gamma = 2.29 \pm 0.02$ & $\beta = -0.17 \pm
      0.04 $ & & 14.5 (14) & $82.8 \pm 2.2$ \\
      $\displaystyle{I_0\ \left( E / E_{{\rm B}} \right) ^ {-\Gamma_1}\ \left( 1 + \left(E /
      E_{{\rm B}}\right) ^ {1 / S } \right) ^ {~ S ~ (\Gamma_1
      - \Gamma_2)}}$ & $I_0 = 2.2 \pm 1.0$ & $\Gamma_1
      = 2.26 \pm 0.03$ & $\Gamma_2 = 2.63 \pm 0.07$ & $ E_{{\rm B}} =
      2.7 \pm 0.5 $ & 15.1 (13) & $84.6 \pm 38.5 $\\[0.15cm]
      \hline
    \end{tabular}
\end{table}