as M82 display higher $\sim$100L$_{\sun}$M$_{\sun}$$^{-1}$ values [see @Sanders1986; @Wild1992].

[lccccc]{}Target & L$_{\rm LW2}$ & L$_{\rm LW3}$ & & &\
IRAS name & (10$^9$L$_{\sun}$) &(10$^9$L$_{\sun}$)& L$_{\rm IR}$ & L$_{\rm IR}$ & M$_{\rm H_2}$\

19254-7245(S) & 53.8 & 42.9 & – & – & –\
19254-7245(N) & 1.1 & 0.9 & – & – & –\
19254-7245 & 54.9 & 43.8 & 0.05 & 0.04 & 34.1\
\
23128-5919(S) & 17.7 & 19.2 & – & – & –\
23128-5919(N) & 9.6 & 7.5 & – & – & –\
23128-5919 & 27.3 & 26.7 & 0.03 & 0.03 & 70.2\
\
14348-1447(S) & 18.9 & 21.6 & – & – & –\
14348-1447(N) & 9.8 & 6.7 & – & – & –\
14348-1447 & 28.7 & 28.3 & 0.02 & 0.02 & 31.0\

Let us now review the MIR properties of each system in detail.

IRAS19254-7245
--------------

The ultraluminous infrared galaxy IRAS19254-7245, also known as the “Superantennae” is the result of a collision between two gas-rich spiral galaxies separated by 10 kpc (8.5) in projection and displays extremely long tidal tails extending to 350kpc [@Mirabel1990]. Only the MIR emission originating from the nuclear regions of the galaxies is detected in 