{"coeffs": [-7.564467669025438e-08, 2.966905902152275e-06, 0.3981651617191452, 0.09484448350921598], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [1.2815579157042892e-07, 8.78722853105228e-07, 0.052643028394739604, 0.02832430418756014], "covariance": [[1.642390691304322e-14, -8.953069812440498e-14, -4.919560473019022e-09, -3.3002286829101903e-09], [-8.95306981244049e-14, 7.721538525693921e-13, 4.5883973113159926e-08, 2.3768489708268915e-08], [-4.919560473019016e-09, 4.5883973113159926e-08, 0.0027712884385693603, 0.001384536664015387], [-3.3002286829101887e-09, 2.3768489708268925e-08, 0.0013845366640153874, 0.0008022662077094368]]}