Observations on holographic aspects of four-dimensional asymptotically flat ${\cal N}=2$ black holes

In this note, we recast four-dimensional near-extremal Reissner-Nordstrom black hole solutions in ungauged ${\cal N}=2$ supergravity theories as a specific first-order deformation, associated with an infinitesimal Harrison transformation, of black holes in an AdS$_2$ space-time. Subsequently, we exhibit how bulk properties of the four-dimensional black holes, such as mass and entropy, are holographically encoded in the one-dimensional boundary theory dual to gravity in an infinitesimally deformed AdS$_2$ space-time.