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Rest \label{fig:spectrum}  \caption{Rest  wavelength spectrum of the central annulus of BCG 2039. The black line represents our data, the red line shows the best fitting stellar populations from STECKMAP. The green line shows the residuals of the fit. The shaded regions show the regions that were masked on the fit. The major features are marked with dotted vertical lines. The recovered stellar populations are $[$Fe/H$]_{[\alpha/Fe]=0}=0.13\pm0.01$ and Age~$=9.6\pm1.0$~Gyr. The fit is a good match to the data.   \label{fig:spectrum} data.}