Correlation matrix associated with the likelihood fit. Each entry corresponds to one free parameter of the model. The names isodiff and galdiff correspond to the isotropic and galactic diffuse backgrounds, Coma corresponds to the ICM cluster model, and all the other names to the 4FGL sources. The labels of the parameters are as follows: Norm stands for the spectrum normalization; PL index stands for the spectral index of sources described by a power law spectrum; LP α and LP β stand for the spectral parameters of the sources described by a log-parabola spectrum. This correlation matrix corresponds to the case that includes 4FGL J1256.9+2736, and for the MINOT cluster model with .