Left panel: the three main regions (D1, T1, and UT1; Sect. 3), along with the two “faint” regions discussed in Sect. 3.5, on top of the sum of all SW and LW filters’ observations. Right panel: All the micro regions discussed in Sect. 4, on top of the sum of the SW filters’ observations. The ellipses marking the extent of the main regions are kept, in transparency. In both panels the FoV of the IFU is shown as a black contour. All the IFU masks used in this work are shown in Appendix G.