Moment-zero maps of the SiC₂ ﹩{J}_{{K}_{a},{K}_{c}}={9}_{4,6}﹩–8_4,5 (left panel) and ﹩{J}_{{K}_{a},{K}_{c}}={9}_{4,5}﹩–8_4,4 (right panel) transitions. Crosses denote the phase center. The synthesized beam, shown in the bottom-left corner, has a size of 0﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩72 × 0﹩\mathop{.}\limits^{{\unicode{x02033}}}﹩41.