N=4 supergravity with antisymmetric tenser in central charge superspace

A concise geometrical formulation of N = 4 supergravity containing an antis ymmetric tenser gauge field is given in central charge superspace: gravipho tons are identified in the super-vielbein on the same footing as the vierbe in and the Rarita-Schwinger fields. As a consequence of superspace solderin g, Chern-Simons terms in the field strength of the antisymmetric tenser ari se as an intrinsic property of superspace with central charge coordinates.