We report on Mid-Infrared ( MIR ) observations of the Seyfert 2 galaxy NGC 1068 , obtained with ISOCAM in low-resolution spectro-imaging mode .
The spatial resolution ( \sim 5 ″ ) allows us to disentangle the circumnuclear starburst regions from the emission of the active galactic nucleus ( AGN ) .
The global spatial distribution of the Unidentified Infrared Bands ( UIBs ) is similar to the cold dust component , traced by the 450 \mu m emission and the gaseous component obtained from the ^ { 12 } CO ( 1-0 ) map .
However , a shift between the maximum of the UIB and 450 \mu m emission is clearly seen in our maps .
The UIBs in the MIR ( 5-16 \mu m ) originate almost exclusively from the starburst regions in the galactic disk with an emission peaking at the extremity of the stellar/gaseous bar at a distance of 1 kpc from the AGN .
The spectrum of the nucleus is characterized over the whole 5-16 \mu m range by a strong continuum which can be fitted with a power law of index \alpha = -1.7 .
Moreover , the high [ NeIII ] / [ NeII ] ratio ( \mathrel { \hbox { \raise 1.29 pt \hbox { $ > $ } \kern - 8.0 pt \lower 3.44 pt \hbox { $ \sim$ } } } 2.5 ) in the nuclear region argues for a hard radiation field from the AGN .
Observations indicate that the AGN in NGC 1068 contributes less than \sim 5 % to the total integrated UIB emission even though its hot dust continuum contributes as much as 75 % to the total MIR flux .
On the contrary , the nuclear contribution to the cold dust emission decreases considerably at submillimeter wavelengths and does not represent more than 25 % of the total integrated emission at 450 \mu m .