Common grid (indicated by the black lines) generated for the SPIRE FTS observation overlaid on the star formation rate (SFR) map of M 83. The displayed SFR map has an equivalent spatial resolution (FWHM = 6.43′′), the same as the MIPS 24 μm broad-band image. Each pixel (black box) has a size of 15′′ × 15′′, which is equivalent to 330 pc × 330 pc at the distance to M 83. The SFR map is constructed from the far-ultraviolet (FUV) and 24 μm photometry maps following the calibration given in Hao et al. (2011; see Sects. 2.2 and 4.1 for more description). The magenta and cyan crosses indicate the pointings of the SLW and SSW detectors from all jiggle positions. The pixels masked by semi-transparent cyan color are outside the coverage of the SPIRE FTS maps presented in this work. The pixels masked by the semi-transparent gray color are truncated after the maps for observed lines are convolved to 42′′. The spectral energy distributions (SEDs) of three colored pixels, in blue, green, and red, indicating the nuclear, arm, and inter-arm regions, are displayed in Fig. 6 (see Sect. 3.2). The thick black lines are present as a guide to the labeled coordinates in the J2000 epoch.
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