Spectrum of the main lensing galaxy in SDSS J1339+1310. The observed spectrum (see Fig. 4) is smoothed by a 5-point filter and represented by a green line, while the template spectrum for an elliptical galaxy is properly red-shifted (z_l = 0.609) and drawn with a magenta line. Grey highlighted regions and vertical dashed lines are associated with sky absorption/emission and galaxy absorption lines, respectively (see main text).