NGC1068 interferometric mid-IR measurements

We expect the infrared emission of the dusty torus to react on the intrinsic changes of the accretion disk. We aim to investigate the origin of the X-ray variation by investigating the response of the mid-infrared environment.

We obtained single-aperture and interferometric mid-infrared measurements and directly compared the measurements observed before and immediately after the X-ray variations. The average correlated and single-aperture fluxes as well as the differential phases were directly compared to detect a possible change in the structure of the nuclear emission on scales of ~2pc. The flux densities and differential phases of the observations before and during the X-ray variation show no significant change over a period of ten years.