An X-ray Luminosity-dependent "Changing-look" Phenomenon in UGC 3223
  The nature of the rare "Changing-look" (CL) phenomenon in active galactic
nuclei (AGNs) is still under debate at current stage. We here present \it
Swift/\rm XRT and UVOT follow-up observations of UGC\,3223, a newly discovered
repeat CL-AGN with type transitions of $\mathrm{S1.5\rightarrow S2 \rightarrow
S1.8}$ occurring in a period of about 30 years. By comparing the values
previously reported in the \it ROSAT \rm All-sky Survey and in the second
Swift-XRT Point Source catalog, we clearly find that the X-ray flux tightly
follows the optical spectral transition, in which a spectral type closer to a
Seyfert 1 type is associated with a higher X-ray flux. An invariable X-ray
spectral shape is, however, found in the CL phenomenon of the object. An
extremely low Eddington ratio of $\sim2\times10^{-4}$ can be obtained from the
X-ray luminosity for its Seyfert 2 state, which suggests a favor of the
disk-wind broad-line region model in explaining the CL phenomenon. A variation
of the total UV emission is not revealed when compared to the previous \it
GALEX \rm NUV observation, since the UVOT images indicate that $\sim90$\% UV
emission comes from the intensive star formation in the host galaxy.
