Table 10: Electron temperature indicators in NGC 6153.
Ion Ioniz. Lines Observed $T_{{\rm e}}$
  pot. (eV) used ratio (K)
[N II] 14.5 5755/6584 0.017 9600
  23.3 6312/18.7 0.016 8000
  27.6 7136/8.99 0.342 $\leq$7000
  35.1 4363/5007 0.0047 9030
  35.1 5007/52 3.6 7800
  35.1 1663/5007 $\leq$0.00159 $\leq$7900
  41.0 3868/15.5 0.290 8200


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