Point-source calibrated spectra from two central detectors, SLWC3 (red) and SSWD4 (blue). These spectra are from the first jiggle position of the Obs. ID = 1342219550, and the locations of the two detectors are shown as the yellow and orange crosses in Fig. 3. Additionally, the spectral lines observed with the SPIRE FTS are indicated by the blackdashed lines. We note that no further data processing (e.g., baseline subtraction and smoothing) was done for the spectral lines here, which are at their original angular resolutions (e.g., Table 1).