Table 1: Best-fit values of the 5 fits for each TDG. i is the inclination, and the EFE estimates refer to Sect. 3. The 1-$\sigma $ uncertainties in the fitted inclinations are based on the $\chi ^2$ statistics.

TDG name		 $\chi ^2$ i Note
NGC 5291N 0.60 45 deg no EFE
  0.16 $\rm 50^{+10}_{-7}$ deg no EFE
  0.30 $\rm 57^{+17}_{-9}$ deg first EFE estimate
  0.17 $\rm 50^{+10}_{-8}$ deg second EFE estimate
  3.60 $\rm 90^{+0}_{-16}$ deg baryons + Newt. gravity

NGC 5291S		 5.42 45 deg no EFE
  1.36 $34\pm4$ deg no EFE
  2.70 $\rm 39^{+6}_{-5} $ deg first EFE estimate
  1.70 $35\pm4$ deg second EFE estimate
  3.25 $\rm 90^{+0}_{-30}$ deg baryons + Newt. gravity

NGC 5291SW		 0.45 45 deg no EFE
  0.09 $\rm 39^{+11}_{-7}$ deg no EFE
  0.19 $\rm 44^{+16}_{-9}$ deg first EFE estimate
  0.09 $\rm 39^{+11}_{-7}$ deg second EFE estimate
  0.42 $\rm 90^{+0}_{-33}$ deg baryons + Newt. gravity


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