{"coeffs": [-2.1748134599875078e-07, 6.356188318736694e-09, -0.33147609741933626, 0.001961794165577031], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [2.1371012946137738e-08, 1.1590058748982607e-08, 101690.8091896806, 148612.35955849453], "covariance": [[4.567201943439867e-16, -3.7304257961080825e-24, 1.446079759663863e-11, 9.3536295811258e-12], [-3.7304257966032595e-24, 1.3432946180486827e-16, 3.5960740864911656e-12, 3.507611092922175e-12], [9.3536295811258e-12, 2.33840739528145e-12, 10341020673.652029, 15112511099.091072], [9.3536295811258e-12, 2.33840739528145e-12, 15112511099.091072, 22085633413.54326]]}