Type I AGN - dust and ionized gas around the nuclei

In this work we want to determine if type 1 AGN are indeed unobscured. To reach the goal we make use of optical HST and IR VLT (K-band) images. This combination provides the accurate positions of the nuclei (IR peaks) down to 10 mas. Moreover, we are able to construct dust extinction maps as IR-optical color images. These provide the morphology of the dusty absorber. Using narrow HST filters we also create Hα and O[iii] ionized gas maps. The dust (which is present in all of the examined objects) is in some cases able to obscure the nucleus, either partially or totally, which is supported by the finding of a shift between the IR and optical peaks. We conclude that the dusty torus is not the only cause of the obscuration. Therefore, we discuss if the torus is indeed necessary to explain the type 1 and 2 dichotomy.