  Simultaneous observations of X-rays and radio luminosities have been well
studied in accreting stellar-mass black holes. These observations are performed
in order to understand how mass accretion rates and jetted outflows are linked
in these individual systems. Such contemporaneous studies in supermassive black
holes (SMBH) are harder to perform, as viscous times scale linearly with mass.
However, as NGC 4395 is the lowest known mass Seyfert galaxy, we have used it
to examine the simultaneous X-ray (Swift) and radio (VLA) correlation in a SMBH
in a reasonably timed observing campaign. We find that the intrinsic X-ray
variability is stronger than the radio variability, and that the fluxes are
only weakly or tentatively coupled, similar to prior results obtained in NGC
4051. If the corona and the base of the jet are one and the same, this may
suggest that the corona in radio-quiet AGN filters disk variations, only
transferring the strongest and/or most sustained variations into the jet.
Further, when both NGC 4395 and NGC 4051 are placed on the stellar-mass L_X-L_R
plane, they appear to reside on the steeper L_X-L_R track. This suggests that
SMBHs also follow two distinct tracks just as stellar-mass black holes do, and
supports the idea that the same physical disk-jet mechanisms are at play across
the mass scale.
