Table 2: Fits of the observed SO2 emission with elliptical models. G stands for elliptical Gaussian model, D for elliptical disk. The synthesized beam orientation is -20$^{\circ }$ on the leading side and -15$^{\circ }$ on the trailing side.
Fit type Ellipse orientation ($^{\circ }$) Total flux (Jy) Resolved size ('') $\Delta$RA ('') $\Delta$Dec ('')
Leading side          
D -15.6 $\pm$ 3.5 1.14 $\pm$ 0.11 0.91 $\pm$ 0.08 0.18 $\pm$ 0.10 -0.03 $\pm$ 0.29
G -15.9 $\pm$ 5.7 1.16 $\pm$ 0.11 0.65 $\pm$ 0.10 0.20 $\pm$ 0.10 -0.02 $\pm$ 0.27
Trailing side          
D -5.0 $\pm$ 6.9 0.52 $\pm$ 0.08 0.66 $\pm$ 0.16 0.017 $\pm$ 0.05 0.29 $\pm$ 0.18
G -4.9 $\pm$ 7.6 0.54 $\pm$ 0.09 0.44 $\pm$ 0.13 0.026 $\pm$ 0.05 0.24 $\pm$ 0.19

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