090086

A substantial fraction of accreting IMBHs show suppressed X-ray emission compared to the expectation from the active galactic nuclei (AGNs) accretion disk-corona connection. They also show unusally strong X-ray variability. We propose a systematic XMM-Newton survey (8-25 ks exposures) of the 14 extremely X-ray weak (by factors of and amp amp amp gt 10) accreting IMBHs selected from previous Chandra snapshot coverage. We aim to identify large-amplitude X-ray variability and characterize X-ray spectral properties. We will determine whether absorption from clumpy disk wind associated with super-Eddington accretion is responsible for the extreme X-ray weakness and X-ray variability and thus to unify these IMBHs and super-Eddington accreting AGNs under the same physical scenario. [truncated! Please see actual data for full text]