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Generalizing the scaling limit of Martelli and Sparks [hep-th/0505027] intoan arbitrary number of spacetime dimensions we re-obtain the (most generalexplicitly known) Einstein-Sasaki spaces constructed by Chen, Lu, and Pope[hep-th/0604125]. We demonstrate that this limit has a well-defined geometricalmeaning which links together the principal conformal Killing-Yano tensor of theoriginal Kerr-NUT-(A)dS spacetime, the Kahler 2-form of the resultingEinstein-Kahler base, and the Sasakian 1-form of the final Einstein-Sasakispace. The obtained Einstein-Sasaki space possesses the tower of Killing-Yanotensors of increasing rank, underlined by the existence of Killing spinors. Asimilar tower of hidden symmetries is observed in the original(odd-dimensional) Kerr-NUT-(A)dS spacetime. This rises an interesting questionwhether also these symmetries can be related to the existence of some"generalized" Killing spinor.

On the supersymmetric limit of Kerr-NUT-AdS metrics