{"coeffs": [-1.2772416385900202e-07, 2.1104867680176973e-09, -0.3335570178777422, 0.000972704203815426], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [5.7862202582783315e-08, 2.814152953271805e-08, 90423.62997376565, 125628.9277715416], "covariance": [[3.348034487731056e-15, 7.239426916102952e-19, 0.0023149570715607377, -0.0032162562810063946], [7.239427413538895e-19, 7.919456844408421e-16, 2.5569996396878834e-06, -3.552489158039576e-06], [0.0023149570729147388, 2.557000739274542e-06, 8176432857.632491, -11359823678.814772], [-0.0032162562808497335, -3.5524896019124143e-06, -11359823678.814772, 15782627493.027216]]}