Description
In flat space the S-matrix is a gauge-independent observable in perturbative quantum gravity. The gauge-independence owes to the source and observer corrections that need to be included. I will discuss the generalization of this procedure to de Sitter space, without taking the asymptotic limits of the S-matrix, and recent work demonstrating gauge-independence of the construction. This is a step towards constructing renormalized one-loop quantum-gravitational observables in de Sitter.