{"coeffs": [-4.068880329049319e-08, 6.249262746082254e-06, 0.47552611661398014, 0.06979809233067949], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [1.555999780973267e-08, 7.957597025190061e-07, 0.015957140561197215, 0.0037694601153841654], "covariance": [[2.4211353183888556e-16, -8.472871853097563e-15, -1.704894660375522e-10, -4.687774883993911e-11], [-8.472871853097533e-15, 6.332335041531371e-13, 1.2681315415793105e-08, 2.8805505118810918e-09], [-1.7048946603755163e-10, 1.2681315415793109e-08, 0.00025463033488980533, 5.820898193298351e-05], [-4.68777488399391e-11, 2.880550511881096e-09, 5.820898193298357e-05, 1.4208829561472006e-05]]}