PACS spectrum of WRAY 15-751, integrated over the nine central spaxels. Indicated are the lines [Niii], [Oi], [Oiii], [Nii] and [Cii]. The continuum shape below 55 μm results from a yet-imperfect spectral response function correction, while above 190 μm it results from a light leak, from the second diffraction order of the grating in the first one. The different bands are indicated with different colors.