{"coeffs": [-1.1384502904901158e-06, -2.3420294849799865e-08, -0.18553702604418315, 0.033814931637661506], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [9.785943685042123e-08, 7.373099410155165e-08, 0.02223754623637197, 0.019317815753905447], "covariance": [[9.57646938068158e-15, -5.002098262017164e-16, 8.259595001312822e-10, -7.106951167626275e-10], [-5.002098262017163e-16, 5.436259491203043e-15, 4.4884436756640496e-10, 4.185578778810233e-10], [8.259595001312821e-10, 4.4884436756640486e-10, 0.0004945084626147813, -2.6804974134576585e-05], [-7.106951167626274e-10, 4.1855787788102333e-10, -2.6804974134576575e-05, 0.0003731780055018375]]}