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We study the holographic description of ${\cal N}=2$ Super Conformal FieldTheories in four dimensions first given by Gaiotto and Maldacena. We presentnew expressions that holographically calculate characteristic numbers of theCFT and associated Hanany-Witten set-ups, or more dynamical observables, likethe central charge. A number of examples of varying complexity are studied andsome proofs for these new expressions are presented. We repeat this treatmentfor the case of the marginally deformed Gaiotto-Maldacena theories, presentingan infinite family of new solutions and compute some of its observables. Thesenew backgrounds rely on the solution of a Laplace equation and a boundarycondition, encoding the kinematics of the original conformal field theory.

Holographic Aspects of Four Dimensional ${\cal N }=2$ SCFTs and their Marginal Deformations