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We extract the leading-order entropy of a four-dimensional extremal blackhole in ${\cal N}{=}2$ ungauged supergravity by formulating the CFT$_1$ that isholographically dual to its near-horizon AdS$_2$ geometry, in terms of arational Calogero model with a known counting formula for the degeneracy ofstates in its Hilbert space.

A Calogero formulation for four-dimensional black-hole micro states