{"coeffs": [-2.7201613477249016e-07, 4.6520965837745126e-09, -0.33465969763935643, 0.0010137185494956933], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.110678900546869e-08, 1.1446769387521692e-08, 139115.0005975917, 77428.35307568256], "covariance": [[4.45496542121374e-16, 1.9320332640908948e-33, 2.28094228253302e-12, 1.252128058560719e-13], [1.9320332640908948e-33, 1.3102852941110372e-16, 1.824753826026416e-11, -7.682700883550605e-12], [4.56188456506604e-12, 1.3685653695198118e-11, 19352983391.267933, -10771445384.394117], [0.0, -4.56188456506604e-12, -10771445384.394117, 5995149860.012561]]}