\begin{table}%t2
\caption{UV-bump parameters analogous to those introduced by Fitzpatrick \& 
Massa (\cite{FIT90}).}
\label{tab_fmpar}
%\centering
\par
\begin{tabular}{@{ \ } l l c @{ \ \ \ } c @{ \ \ \ } c @{ \ \ } c @{ \ } c 
@{ \ }}
\hline\hline
\noalign{\smallskip}
Sample$^{a}$ & Selection & $E_{B-V}$ & $x_0$ [$\mu$m$^{-1}$] & 
$\lambda_0$ [\AA{}] & $\gamma$ [$\mu$m$^{-1}$] & {\it FWHM} [\AA{}] \\
%\noalign{\smallskip}
\hline
%\noalign{\smallskip}
(a) gm\_wbb &
GMASS, $1.5 < z < 2.5$, $\gamma_{34} > -2$, $\beta_{\rm b} < -1.5$ &
$0.164 \pm 0.069$ & $4.493 \pm 0.024$ & $2226 \pm 12$ &  $0.498 \pm 0.113$ & 
$247 \pm 56$ \\ 
(b) gm\_wbr &
GMASS, $1.5 < z < 2.5$, $\gamma_{34} > -2$, $\beta_{\rm b} > -1.5$ &
$0.286 \pm 0.071$ & $4.558 \pm 0.024$ & $2194 \pm 11$ & $0.682 \pm 0.052$ & 
$328 \pm 25$ \\
(c) gm\_sb &
GMASS, $1.5 < z < 2.5$, $\gamma_{34} < -2$ & $0.296 \pm 0.069$ &
$4.572 \pm 0.010$ & $2187 \pm 05$ & $0.573 \pm 0.021$ & $274 \pm 10$ \\
(d) n07\_sb &
FDF/K20, $1.0 < z < 1.5$, $\gamma_{34} < -2$ & $0.344 \pm 0.078$ & 
$4.570 \pm 0.019$ & $2188 \pm 09$ & $0.583 \pm 0.083$ & $279 \pm 38$ \\
(e) LMC2\_low$\gamma$ & LMC~2 supershell ($\gamma < 1$) & 
$0.188 \pm 0.009$ & $4.540 \pm 0.053$ & $2203 \pm 26$ & $0.684 \pm 0.042$ & 
$332 \pm 21$ \\
%\noalign{\smallskip}
\hline
\noalign{\smallskip}
Sample$^{a}$ & Selection & $c_3$ [$\mu$m$^{-2}$] & $E_{\rm bump}$ & 
$A_{\rm bump}$ [$\mu$m$^{-1}$] & & \\
%\noalign{\smallskip}
\hline
%\noalign{\smallskip}
(a) gm\_wbb & 
GMASS, $1.5 < z < 2.5$, $\gamma_{34} > -2$, $\beta_{\rm b} < -1.5$ &
$0.116 \pm 0.055$ & $0.467 \pm 0.267$ & $0.366 \pm 0.192$ & & \\ 
(b) gm\_wbr & 
GMASS, $1.5 < z < 2.5$, $\gamma_{34} > -2$, $\beta_{\rm b} > -1.5$ &
$0.262 \pm 0.040$ & $0.562 \pm 0.106$ & $0.602 \pm 0.104$ & & \\
(c) gm\_sb & 
GMASS, $1.5 < z < 2.5$, $\gamma_{34} < -2$ & $0.305 \pm 0.020$ & 
$0.928 \pm 0.077$ & $0.835 \pm 0.062$ & & \\
(d) n07\_sb & 
FDF/K20, $1.0 < z < 1.5$, $\gamma_{34} < -2$ & $0.359 \pm 0.121$ & 
$1.056 \pm 0.186$ & $0.968 \pm 0.251$ & & \\
(e) LMC2\_low$\gamma$ & LMC~2 supershell ($\gamma < 1$) & 
$0.890 \pm 0.128$ & $1.903 \pm 0.320$ & $2.044 \pm 0.320$ & & \\
%\noalign{\smallskip}
\hline
\end{tabular}
\begin{list}{}{}
\item[$^{a}$] For the samples at high redshift, the given errors are 
based on the uncertainties in the continuum of the mean spectrum without the 
2175~\AA{} feature, $E_{B-V}$, and the FM-like parameter fit. For the LMC, 
they represent the sample variance.
\end{list}
\end{table}