An analytic Fisher-based formula computes the covariance between parameters from two correlated data sets; applied to SPTpol TE and EE spectra, it shows the constraints are weakly positively correlated and that ignoring this correlation biases consistency tests.
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Analytic Calculation of Covariance between Cosmological Parameters from Correlated Data Sets, with an Application to SPTpol
An analytic Fisher-based formula computes the covariance between parameters from two correlated data sets; applied to SPTpol TE and EE spectra, it shows the constraints are weakly positively correlated and that ignoring this correlation biases consistency tests.