{"coeffs": [-1.467340747275031e-07, -8.988243730319755e-09, -0.2615735956367755, 0.0007200951503797206], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [6.53045548748503e-08, 4.461149824734269e-08, 613103.0263708103, 470913.5230208936], "covariance": [[4.264684887402334e-15, -1.2946585576076337e-31, 2.4455408716826594e-10, -1.5101278258204664e-10], [-1.424124413368397e-31, 1.9901857758726597e-15, -1.2227704358413297e-10, 1.5709820849733046e-10], [2.4455408716826594e-10, -1.2227704358413297e-10, 375895320945.04663, -288718506123.0502], [-1.5284630448016623e-10, 1.5284630448016623e-10, -288718506123.0502, 221759546163.94974]]}