{"coeffs": [-1.9495287337836316e-07, 1.1328717598150743e-08, -0.2752016492135983, 0.0103421183435899], "function": "lambda x, A, B, C, D: (D + ((C - D) / (1 + numpy.exp((B - x) / A))))", "log_ftol": 1e-08, "errors": [4.42171183742931e-08, 2.7859305898008514e-08, 0.03716876542388237, 0.022224393835611308], "covariance": [[1.9551535573262486e-15, -8.791982903042546e-18, 5.485046317293108e-10, -3.074777885047227e-10], [-8.791982903042556e-18, 7.761409251188121e-16, 1.3543420075122955e-10, 5.513619901924662e-11], [5.485046317293108e-10, 1.3543420075122955e-10, 0.0013815171231355938, -0.000402564579146142], [-3.074777885047227e-10, 5.5136199019246605e-11, -0.000402564579146142, 0.000493923681360358]]}