Table 2: Intensities and ratio of the [Ne II]12.8 $\mu $m and [Ne III]15.6 $\mu $m for Arp 299. The values of [Ne II] were measured by Dudley (1999) and should be considered as upper limits as they may be contaminated by the 12.7 $\mu $m PAH feature (see text).
  I([Ne II]) I([Ne III])  
Source ( $10^{-15}~{\rm W~m}^{-2}$) ( $10^{-15}~{\rm W~m}^{-2}$) $\frac{I([{\rm NeIII}])}{I([{\rm NeII}])}$
A <2 - -
B1 0.7 >1.3 $\geq$1.8
C 2.0 1.3 $\geq$0.65
C$^\prime $ <0.9 0.5 >0.55


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