the northern galaxy has much weaker emission lines in H$\alpha$ and \[NII\], typical of a starburst or LINER [@Colina1991]. More recently HST imaging provided new evidence that a double nucleus may be present in both the north and southern components of the Superantennae [@Borne1999], suggesting a multiple merger origin of the system.

Based on the photometry of Table \[phot\], we present in Figures \[ir19254s\_spec\] and \[ir19254n\_spec\] the MIR spectral energy distribution for each galaxy, while the integrated MIR SED of the whole system is shown in Figure \[ir19254s\_phot\]. In the latter we also compare our data with the spectrum obtained with ISOPHOT-S, the beam of which spatially covered the full emission of IRAS19254-7245. The extreme difference in the MIR intensities between the southern and northern members are apparant as well as the constrasts in their spectral shape.

More than 95 $\%$ of the MIR emission of IRAS19254-7245 originates from the southern Seyfert 2 galaxy which displays a peculiar spectrum with a dominant thermal emission at 15$\mu$m (f$_{15\mu
m}$/f$_{6.7\mu m}$ $\sim$2.7) and weak UIBs (f$_{6.7\mu m}$/f$_{6\mu
m}$$\sim$1.2). This strong continuum relative to the UIB emission can be the consequence of a high radiation field density mainly produced in ionized regions close 