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We present Multi-Unit Spectroscopic Explorer (MUSE) integral-fieldspectroscopy of ESO 253$-$G003, which hosts a known Active Galactic Nucleus(AGN) and the periodic nuclear transient ASASSN-14ko, observed as part of theAll-weather MUse Supernova Integral-field of Nearby Galaxies (AMUSING) survey.The MUSE observations reveal that the inner region hosts two AGN separated by$1.4\pm0.1~\rm{kpc}$ ($\approx 1.\!\!^{\prime\prime}7$). The brighter nucleushas asymmetric broad, permitted emission-line profiles and is associated withthe archival AGN designation. The fainter nucleus does not have a broademission-line component but exhibits other AGN characteristics, including$v_{\rm{FWHM}}\approx 700~\rm{km}~\rm{s}^{-1}$ forbidden line emission,$\log_{10}(\rm{[OIII]}/\rm{H}\beta) \approx 1.1$, and high excitation potentialemission lines such as [Fe$~$VII]$~\lambda6086$ and He$~$II$~\lambda4686$. Thehost galaxy exhibits a disturbed morphology with large kpc-scale tidalfeatures, potential outflows from both nuclei, and a likely superbubble. Acircular relativistic disk model cannot reproduce the asymmetric broademission-line profiles in the brighter nucleus, but two non-axisymmetric diskmodels provide good fits to the broad emission-line profiles: an ellipticaldisk model and a circular disk + spiral arm model. Implications for theperiodic nuclear transient ASASSN-14ko are discussed.

An Amusing Look at the Host of the Periodic Nuclear Transient ASASSN-14ko Reveals a Second AGN