{"coeffs": [-1.0109157917120066e-07, 4.4868943930668313e-10, -0.26022372090042295, 0.0005566720861657626], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.2865315917635576e-08, 1.5619996792688596e-08, 155853.76280522672, 188135.62818853717], "covariance": [[5.228226720132788e-16, -1.587167347045768e-33, -1.03635843046708e-12, -1.499037176478814e-11], [0.0, 2.43984299803602e-16, -7.847912743484318e-13, -3.747592941197035e-12], [0.0, -1.8737964705985174e-12, 24290395380.547874, 29321645570.908596], [-1.499037176478814e-11, -7.49518588239407e-12, 29321645570.908596, 35395014593.8955]]}