The total spectrum (black) of the [C II]_{158 μm} line, extracted in r = 3″ apertures, using residual scaling, in the previous PdBI data (left) and the new NOEMA data (right). The single-Gaussian (+continuum) fits to both data sets are shown in orange, and the parameters are given in the upper left corners. The best-fit continuum (constant) and single-Gaussian model parameters are consistent between the two data sets. We note that the increases in noise (shown as the red lines) in the PdBI data at low (<254.7 GHz) and high (>258 GHz) frequencies are due to the way in which the data were frequency-stitched at the time.