{"coeffs": [-7.566634955944555e-07, -9.223332629788699e-09, -0.21055214441909254, 0.09647419579995585], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [8.619273614117704e-08, 4.20756038470478e-08, 0.035585350512972534, 0.03229643782721483], "covariance": [[7.429187763502567e-15, -1.3233041891600058e-15, 2.2336850276859035e-09, -2.1342473826512794e-09], [-1.3233041891600052e-15, 1.7703564390937036e-15, 1.9019835076334806e-10, 8.358647096343645e-10], [2.2336850276859035e-09, 1.9019835076334793e-10, 0.0012663171711311146, -0.0004696971987976562], [-2.134247382651279e-09, 8.358647096343645e-10, -0.00046969719879765617, 0.001043059896327153]]}