Fig. 2: Consistency of the inferred strain amplitude of the gravitational wave background with theoretical expectations.
From: Reading signatures of supermassive binary black holes in pulsar timing array observations
Bottom panels show the predicted log-10 strain amplitude lgA from 26 studies. The top panels show posteriors on lgA marginalised over γ. Red lines correspond to the original noise model, and blue lines correspond to our revised model. Solid lines correspond to the 10-year data, and dashed lines correspond to the 25-year data. Blue bands correspond to 1σ credible levels for 10-year data and our improved noise model. Panel (a) shows the characteristic strain amplitude at yr−1, lgA. Panel (b) shows the strain amplitude at the frequency of (10yr)−1.
