1320015

The structure and energetics of the innermost regions of black holes are still matter of debate. In particular a lot of the attention is given to the understanding of the radiative mechanisms in coronal plasma around the black hole as well as its connection to the accretion disk and the outflowing material in winds and jets. We have identified the NLSy1 Mkn 110 as an ideal laboratory to investigate both issues through its multi wavelength variability. On one hand an energy-dependent delay between the hard and the soft X-ray emission on few minutes to one hour scale has been discovered in this source and it has been modeled in terms of Comptonization in a hot plasma within 10 R_S from the black hole. On the other hand this source is one of the most variable X-ray AGN in the RXTE sample on time scales of months to years with similar variability also observed in the 8.4 GHz VLA radio light curve (with a peak to peak variability amplitude of ~ 60%) suggesting a connection between the inflow and the outflow. Here we propose to observe Mkn 110 with INTEGRAL for 980 ks followed-up by Swift(XRT) and VLBA observations with the main aim of looking for possible multi frequency time lags. [truncated! Please see actual data for full text]