{"coeffs": [-2.0584243571922456e-07, 7.387033169637989e-09, -0.33130520273765823, 0.0008778213332950851], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [4.476920208208394e-08, 2.4279682465573364e-08, 289857.9917164902, 167187.22064908032], "covariance": [[2.004281455066469e-15, 3.896624498249697e-26, 1.231430526041411e-10, 1.6687044108378776e-11], [2.734325046474886e-26, 5.895029806290707e-16, 2.6585771799990824e-05, 1.5334407209158692e-05], [1.231430526041411e-10, 2.6585771799990824e-05, 84017655361.9169, 48460552018.00413], [0.0, 1.533440658389251e-05, 48460552018.00413, 27951566748.364265]]}