{"coeffs": [-1.6855260417022425e-07, 4.734391248831249e-09, -0.2968826546778609, 0.001401030553539896], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.155079238027044e-08, 1.3197107964768462e-08, 555524.3354204029, 194054.75203900348], "covariance": [[4.644366522175224e-16, -3.0212593851107457e-34, 5.706997622520936e-12, -7.810006429358654e-13], [0.0, 1.7416365863375517e-16, -2.2827990490083743e-11, 1.593580398289224e-11], [5.706997622520936e-12, -2.2827990490083743e-11, 308607287244.28033, -107802137161.63847], [0.0, 1.7120992867562806e-11, -107802137161.63847, 37657246788.91913]]}