Millimeter-band variability of the radio-quiet nucleus of NGC7469
  We report short-cadence monitoring of a radio-quiet Active Galactic Nuclei
(AGN), NGC7469, at 95 GHz (3 mm) over a period of 70 days with the CARMA
telescope. The AGN varies significantly ($\pm3\sigma$ from the mean) by a
factor of two within 4-5 days. The intrinsic 95 GHz variability amplitude in
excess of the measurement noise (10%) and relative to the mean flux is
comparable to that in the X-rays, and much higher than at 8.4 GHz. The mm-band
variability and its similarity to the X-ray variability adds to the evidence
that the mm and X-ray emission have the same physical origin, and are
associated with the accretion disk corona.
