\begin{table}%t1
%\centering
\par
  \caption{Previously identified GPS sources.}
  \label{gpssources}
\par
\begin{tabular}{lllllllllll}
  \hline
  \hline
  \noalign{\smallskip}
 Source  &  ID   & $z$ &  Original & Ref.  & $ \nu_{\rm peak}$ & $\alpha_{\rm below}$  & $\alpha_{\rm above}$ & $Var_{\Delta S,\max}$  & $\nu_{Var_{\Delta S}\max}$ & Proposed   \\
  B1950  &     &  &     class  &        &GHz  &             &               & max  &GHz    &    class    \\
  \noalign{\smallskip}
  \hline
  \noalign{\smallskip}
  \object{0048$-$097}& BLO&$\ge $0.2&GPS& 9 &20.4 & 0.09 &--0.22 &7.59 &8  & idb\\ 
  \object{0153+744}  & LPQ &2.338& GPS & 4 &2.1 &0.70 & --0.76 & 5.33 &37 & c\\ 
  \object{0215+015}  & BLO &1.72& HFP & 1 & 12.4&0.40 &--0.40 & 24.33 &14.5 & idb\\ 
  \object{0218+357}  & BLO & 0.936&GPS & 4 & ... &... &--0.16 & 1.71 &8 & f\\ 
  \object{0238$-$084}& GAL &0.0049& GPS & 2 & ... &...&--0.02 & 6.78 &37 & idb\\ 
  \object{0248+430}  & LPQ &1.316& GPS & 5 & 4.9 &0.28 &--0.40 & 6.95 &37 & f\\ 
  \object{0252$-$549}& QSO &0.539& inv & 9 & 37.4 &0.51 &--0.89 & 0.76 &90 & c\\ 
  \object{0332$-$403}& HPQ &1.445& GPS & 9 & 10.6 &0.17 &--0.17 & 1.69 &90 & f\\ 
  \object{0402$-$362}& LPQ &1.417& inv & 9 & 46.8 &0.22 &--0.40 & 3.83 &90 & f\\ 
  \object{0454$-$234}& HPQ &1.003& GPS & 9 & 9.2 &0.10 &--0.28 & 3.05 &90 & f\\ 
  \object{0528+134}  & BLO &2.060& GPS & 4 & 27.8 &0.30 &--0.31 & 13.09 &8 & idb\\ 
  \object{0537$-$441}& BLO &0.896&GPS & 9 & ... &... &--0.01 & 4.33 &90 & f\\ 
  \object{0539$-$057}& HPQ &0.839& inv & 9 & 5.8 &0.20 &--0.31 & 0.66 &37 & f\\ 
  \object{0552+398}  & QSO &2.36& GPS & 4 & 8.9 &1.46 &--0.39 & 3.09 &37 & c\\ 
  \object{0642+449}  & LPQ &3.4& HFP & 1 &18.6 &0.61 &--0.51 & 4.35 &90 & c\\ 
  \object{0738+313}  & QSO &0.631& GPS & 4 & 2.6 &0.26 &--0.30 & 2.94 &37 & f\\ 
  \textbf{\object{0741$-$063}}& N/A &N/A& GPS & 3 & 0.6 &0.83 &--0.86 & 2.17 &37 & gps\\ 
 \textbf{\object{0742+103}}  & GAL &2.624&GPS & 4 & 2.7 &0.55 &--0.53 & 1.27 &8 & gps\\ 
 \textbf{\object{0743$-$006}}& LPQ &0.994&GPS & 10& 7.9 &0.62 &--0.44 & 1.05 &90 & gps\\ 
  \object{0906+430}  & HPQ & 0.668& CSS & 11& ... &... &--0.77 & 3.61 &37 & s\\ 
  \object{0923+392 } & QSO &0.698& HFP & 1 & 11.0 &0.49 &--0.32 & 7.33 &8 & c\\ 
  \object{1057$-$797}& QSO &N/A&GPS & 9 & 17.6 &0.32 &--0.43 & 2.38 &90 & f\\ 
  \object{1145$-$071}& QSO & 1.342&inv & 9 & 3.7 &0.24 &--0.34 & 0.62 &90 & f\\ 
  \object{1334$-$127}& HPQ &0.54&GPS & 9 &37.0 &0.33 &--0.54 & 3.64 &14.5 & c\\ 
  \object{1349$-$439}& BLO &0.05&GPS & 9 & 10.9&0.32 &--0.21 & 3.03 &90 & f\\ 
  \object{1546+027  }& HPQ &0.413&inv & 9 &35.6 &0.18 &--0.17 & 4.16 &90 & f\\ 
  \object{1637+574 } & LPQ &0.75&conv& 6&...&... &--0.03 & 5.62 &37 & f\\ 
  \object{1749+096 } & BLO & 0.32&HFP & 1 &37.1 &0.36 &--0.60 & 18.16 &90& idb\\ 
 \object{1828+487 } & LPQ &0.692&CSS & 7 & ... &... &--0.7 & 2.37 &90 & s\\ 
  \object{1936$-$155}& HPQ &1.657&GPS & 8 &11.9 &0.21 &--0.23 & 4.58 &90 & f\\ 
  \object{1954$-$388}& HPQ &0.63&GPS & 9 &22.1 &0.29 &--0.30 & 2.81 &90 & f\\ 
  \object{2008$-$159}& LPQ &1.181&GPS & 8 & 17.3&0.45 &--0.49 & 4.00 &90 & c\\ 
  \textbf{\object{2021+614}}  & GAL &0.2266&GPS & 4 &5.66 &0.96 &--0.39 & 2.00 & 37& gps\\
  \object{2022+171}  & LPQ &1.05&HFP & 1 &17.8 &0.44 &--0.77 & 0.41 &90 & c\\
  \object{2121+053}  & QSO &1.878&HFP & 1 &6.0 &0.21 &--0.03 & 11.35 &22 & idb\\
  \object{2128$-$123}& LPQ &0.501&GPS & 9 &9.9 &0.24 &--0.53 & 1.03 &90 & c\\ 
  \textbf{\object{2134+004}}&LPQ&1.932&GPS,HFP & 5,1 &4.9 &1.1 &--0.51 & 2.62 &90 & gps\\ 
  \object{2136+141}  & LPQ &2.427&GPS & 9 &10.2&0.33 &--0.39 & 2.49 &8 & f\\ 
  \object{2145+067}  & LPQ &0.99&inv & 9 &21.9&0.39 &--0.39 & 6.16 &22 & idb\\ 
  \object{2216$-$038}& LPQ &0.901&inv & 9 &7.4&0.30 &--0.72 & 3.34 &$\approx$5 & c\\ 
  \object{2230+114}  & HPQ &1.037& CSS & 7 &...&... &--0.22 & 5.06 &90 & f\\ 
  \object{2243$-$123}& HPQ & 0.63&inv & 9 &8.8&0.12 &--0.17 & 1.77 &90 & f\\ 
  \object{2254$-$204}& BLO &N/A&GPS & 9 &27.9& 0.41&--0.92 & 1.71 &90 & c\\ 
  \object{2255$-$282}& LPQ &0.926&GPS & 9 &28.1& 0.74&--0.47 & 7.21 &90 & idb\\ 
\hline
\end{tabular}
 \end{table}