\begin{table}%t1
\caption{\label{tab:IBIS-params}IBIS profile scan parameters.}
%\centering
\small
\begin{tabular}{lcc}
\hline \hline
  Line & \Halpha  & \CaIR \\
\hline 
  Nominal wavelength [nm]     & 656.281  & 854.214 \\
  Instrumental profile FWHM [pm]
                              & 2.2      & 4.4     \\
  Wavelength range [nm]       & 0.21     & 0.18    \\ 
  Core sampling interval [nm] & 0.01     & 0.008   \\
  Number of wavelength steps  & 22       & 20      \\
  Profile scan duration [s]   & 5.2      &  4.7    \\
\hline
\end{tabular}
\end{table}