Precision spectral estimation at sub-Hz frequencies: Closed-form posteriors and Bayesian noise projection

Author(s): Lorenzo Sala and Stefano VitaleWe consider the problem of estimating cross-spectral quantities in the low-frequency regime, where long observation times limit averaging over large ensembles of periodograms, thereby preventing the use of approximate Gaussian statistics. This case is relevant for precision low-frequency gravitation…[Phys. Rev. D 114, 062005] Published Wed Sep 09, 2026