Bayesian evidence for different model fits over the three observation dates (rows) and two scan directions (columns). Each panel has the marginal Bayesian evidence for the specified model (“1comp,” “2comp,” and “3comp) relative to the reference (2comp), which is highlighted in green. Triangles show Bayesian evidences that represent models with >5σ preference against, demonstrating a poor fit. The 2comp model is preferred over all observation dates and scan directions; it provides a significant increase in the marginal Bayesian evidence over the 1comp model, while the additional complexity of the 3comp model does not provide a similar improvement.